core/builtins: Simplify vector of None creation [nfc]

For readability of the codebase, I chose ndarray for the name of the
type, while [numpy.]array() is the name of the most commonly used
constructor.

flake.nix

@@ -5,9 +5,9 @@
 
   outputs = { self, nixpkgs }:
     let
-      pkgs = import nixpkgs { system = "x86_64-linux"; };
+      pkgs = import nixpkgs { system = "aarch64-darwin"; };
     in rec {
-      packages.x86_64-linux = rec {
+      packages.aarch64-darwin = rec {
         llvm-nac3 = pkgs.callPackage ./nix/llvm {};
         nac3artiq = pkgs.python3Packages.toPythonModule (
           pkgs.rustPlatform.buildRustPackage rec {
@@ -142,25 +142,26 @@
 
       packages.x86_64-w64-mingw32 = import ./nix/windows { inherit pkgs; };
 
-      devShell.x86_64-linux = pkgs.mkShell {
+      devShell.aarch64-darwin = pkgs.mkShell {
         name = "nac3-dev-shell";
         buildInputs = with pkgs; [
           # build dependencies
-          packages.x86_64-linux.llvm-nac3
+          packages.aarch64-darwin.llvm-nac3
           llvmPackages_13.clang-unwrapped  # IRRT
           pkgs.llvmPackages_13.llvm.out    # IRRT
+          libiconv
           cargo
           rustc
           # runtime dependencies
           lld_13
-          (packages.x86_64-linux.python3-mimalloc.withPackages(ps: [ ps.numpy ]))
+          (packages.aarch64-darwin.python3-mimalloc.withPackages(ps: [ ps.numpy ]))
           # development tools
           cargo-insta
           clippy
           rustfmt
         ];
       };
-      devShells.x86_64-linux.msys2 = pkgs.mkShell {
+      devShells.aarch64-darwin.msys2 = pkgs.mkShell {
         name = "nac3-dev-shell-msys2";
         buildInputs = with pkgs; [
           curl
@@ -171,7 +172,7 @@
       };
 
       hydraJobs = {
-        inherit (packages.x86_64-linux) llvm-nac3 nac3artiq nac3artiq-pgo;
+        inherit (packages.aarch64-darwin) llvm-nac3 nac3artiq nac3artiq-pgo;
         llvm-nac3-msys2 = packages.x86_64-w64-mingw32.llvm-nac3;
         nac3artiq-msys2 = packages.x86_64-w64-mingw32.nac3artiq;
         nac3artiq-msys2-pkg = packages.x86_64-w64-mingw32.nac3artiq-pkg;

nac3artiq/Cargo.toml

@@ -19,7 +19,7 @@ nac3core = { path = "../nac3core" }
 git = "https://github.com/nbaksalyar/inkwell.git"
 branch = "llvm14"
 default-features = false
-features = ["llvm14-0", "target-x86", "target-arm", "target-riscv", "no-libffi-linking"]
+features = ["llvm14-0", "target-aarch64", "target-arm", "target-riscv", "no-libffi-linking"]
 
 [features]
 init-llvm-profile = []

nac3artiq/src/codegen.rs

@@ -6,7 +6,7 @@ use nac3core::{
     },
     symbol_resolver::ValueEnum,
     toplevel::{DefinitionId, GenCall},
-    typecheck::typedef::{FunSignature, FuncArg, Type, TypeEnum}
+    typecheck::typedef::{FunSignature, FuncArg, Type, TypeEnum},
 };
 
 use nac3parser::ast::{Expr, ExprKind, Located, Stmt, StmtKind, StrRef};
@@ -15,7 +15,10 @@ use inkwell::{
     context::Context, module::Linkage, types::IntType, values::BasicValueEnum, AddressSpace,
 };
 
-use pyo3::{PyObject, PyResult, Python, types::{PyDict, PyList}};
+use pyo3::{
+    types::{PyDict, PyList},
+    PyObject, PyResult, Python,
+};
 
 use crate::{symbol_resolver::InnerResolver, timeline::TimeFns};
 
@@ -68,7 +71,11 @@ impl<'b> CodeGenerator for ArtiqCodeGenerator<'b> {
     ) -> Result<Option<BasicValueEnum<'ctx>>, String> {
         let result = gen_call(self, ctx, obj, fun, params)?;
         if let Some(end) = self.end.clone() {
-            let old_end = self.gen_expr(ctx, &end)?.unwrap().to_basic_value_enum(ctx, self, end.custom.unwrap())?;
+            let old_end = self.gen_expr(ctx, &end)?.unwrap().to_basic_value_enum(
+                ctx,
+                self,
+                end.custom.unwrap(),
+            )?;
             let now = self.timeline.emit_now_mu(ctx);
             let smax = ctx.module.get_function("llvm.smax.i64").unwrap_or_else(|| {
                 let i64 = ctx.ctx.i64_type();
@@ -88,7 +95,11 @@ impl<'b> CodeGenerator for ArtiqCodeGenerator<'b> {
             ctx.builder.build_store(end_store, max);
         }
         if let Some(start) = self.start.clone() {
-            let start_val = self.gen_expr(ctx, &start)?.unwrap().to_basic_value_enum(ctx, self, start.custom.unwrap())?;
+            let start_val = self.gen_expr(ctx, &start)?.unwrap().to_basic_value_enum(
+                ctx,
+                self,
+                start.custom.unwrap(),
+            )?;
             self.timeline.emit_at_mu(ctx, start_val);
         }
         Ok(result)
@@ -120,7 +131,11 @@ impl<'b> CodeGenerator for ArtiqCodeGenerator<'b> {
                         let old_start = self.start.take();
                         let old_end = self.end.take();
                         let now = if let Some(old_start) = &old_start {
-                            self.gen_expr(ctx, old_start)?.unwrap().to_basic_value_enum(ctx, self, old_start.custom.unwrap())?
+                            self.gen_expr(ctx, old_start)?.unwrap().to_basic_value_enum(
+                                ctx,
+                                self,
+                                old_start.custom.unwrap(),
+                            )?
                         } else {
                             self.timeline.emit_now_mu(ctx)
                         };
@@ -174,10 +189,11 @@ impl<'b> CodeGenerator for ArtiqCodeGenerator<'b> {
                         };
                         // set duration
                         let end_expr = self.end.take().unwrap();
-                        let end_val = self
-                            .gen_expr(ctx, &end_expr)?
-                            .unwrap()
-                            .to_basic_value_enum(ctx, self, end_expr.custom.unwrap())?;
+                        let end_val = self.gen_expr(ctx, &end_expr)?.unwrap().to_basic_value_enum(
+                            ctx,
+                            self,
+                            end_expr.custom.unwrap(),
+                        )?;
 
                         // inside a sequential block
                         if old_start.is_none() {
@@ -363,10 +379,8 @@ fn rpc_codegen_callback_fn<'ctx, 'a>(
     }
     // default value handling
     for k in keys.into_iter() {
-        mapping.insert(
-            k.name,
-            ctx.gen_symbol_val(generator, &k.default_value.unwrap(), k.ty).into()
-        );
+        mapping
+            .insert(k.name, ctx.gen_symbol_val(generator, &k.default_value.unwrap(), k.ty).into());
     }
     // reorder the parameters
     let mut real_params = fun
@@ -507,9 +521,15 @@ pub fn attributes_writeback<'ctx, 'a>(
         let mut scratch_buffer = Vec::new();
         for (_, val) in globals.iter() {
             let val = val.as_ref(py);
-            let ty = inner_resolver.get_obj_type(py, val, &mut ctx.unifier, &top_levels, &ctx.primitives)?;
+            let ty = inner_resolver.get_obj_type(
+                py,
+                val,
+                &mut ctx.unifier,
+                &top_levels,
+                &ctx.primitives,
+            )?;
             if let Err(ty) = ty {
-                return Ok(Err(ty))
+                return Ok(Err(ty));
             }
             let ty = ty.unwrap();
             match &*ctx.unifier.get_ty(ty) {
@@ -522,14 +542,18 @@ pub fn attributes_writeback<'ctx, 'a>(
                     let obj = inner_resolver.get_obj_value(py, val, ctx, generator, ty)?.unwrap();
                     for (name, (field_ty, is_mutable)) in fields.iter() {
                         if !is_mutable {
-                            continue
+                            continue;
                         }
                         if gen_rpc_tag(ctx, *field_ty, &mut scratch_buffer).is_ok() {
                             attributes.push(name.to_string());
                             let index = ctx.get_attr_index(ty, *name);
-                            values.push((*field_ty, ctx.build_gep_and_load(
+                            values.push((
+                                *field_ty,
+                                ctx.build_gep_and_load(
                                     obj.into_pointer_value(),
-                                            &[zero, int32.const_int(index as u64, false)])));
+                                    &[zero, int32.const_int(index as u64, false)],
+                                ),
+                            ));
                         }
                     }
                     if !attributes.is_empty() {
@@ -538,33 +562,43 @@ pub fn attributes_writeback<'ctx, 'a>(
                         pydict.set_item("fields", attributes)?;
                         host_attributes.append(pydict)?;
                     }
-                },
+                }
                 TypeEnum::TList { ty: elem_ty } => {
                     if gen_rpc_tag(ctx, *elem_ty, &mut scratch_buffer).is_ok() {
                         let pydict = PyDict::new(py);
                         pydict.set_item("obj", val)?;
                         host_attributes.append(pydict)?;
-                        values.push((ty, inner_resolver.get_obj_value(py, val, ctx, generator, ty)?.unwrap()));
+                        values.push((
+                            ty,
+                            inner_resolver.get_obj_value(py, val, ctx, generator, ty)?.unwrap(),
+                        ));
+                    }
                 }
-                },
                 _ => {}
             }
         }
         let fun = FunSignature {
-            args: values.iter().enumerate().map(|(i, (ty, _))| FuncArg {
+            args: values
+                .iter()
+                .enumerate()
+                .map(|(i, (ty, _))| FuncArg {
                     name: i.to_string().into(),
                     ty: *ty,
-                default_value: None
-            }).collect(),
+                    default_value: None,
+                })
+                .collect(),
             ret: ctx.primitives.none,
-            vars: Default::default()
+            vars: Default::default(),
         };
-        let args: Vec<_> = values.into_iter().map(|(_, val)| (None, ValueEnum::Dynamic(val))).collect();
-        if let Err(e) = rpc_codegen_callback_fn(ctx, None, (&fun, DefinitionId(0)), args, generator) {
+        let args: Vec<_> =
+            values.into_iter().map(|(_, val)| (None, ValueEnum::Dynamic(val))).collect();
+        if let Err(e) = rpc_codegen_callback_fn(ctx, None, (&fun, DefinitionId(0)), args, generator)
+        {
             return Ok(Err(e));
         }
         Ok(Ok(()))
-    }).unwrap()?;
+    })
+    .unwrap()?;
     Ok(())
 }
 

nac3artiq/src/lib.rs

@@ -17,9 +17,9 @@ use nac3parser::{
     ast::{self, ExprKind, Stmt, StmtKind, StrRef},
     parser::{self, parse_program},
 };
+use pyo3::create_exception;
 use pyo3::prelude::*;
 use pyo3::{exceptions, types::PyBytes, types::PyDict, types::PySet};
-use pyo3::create_exception;
 
 use parking_lot::{Mutex, RwLock};
 
@@ -40,7 +40,7 @@ use tempfile::{self, TempDir};
 use crate::codegen::attributes_writeback;
 use crate::{
     codegen::{rpc_codegen_callback, ArtiqCodeGenerator},
-    symbol_resolver::{InnerResolver, PythonHelper, Resolver, DeferredEvaluationStore},
+    symbol_resolver::{DeferredEvaluationStore, InnerResolver, PythonHelper, Resolver},
 };
 
 mod codegen;
@@ -93,7 +93,7 @@ struct Nac3 {
     top_levels: Vec<TopLevelComponent>,
     string_store: Arc<RwLock<HashMap<String, i32>>>,
     exception_ids: Arc<RwLock<HashMap<usize, usize>>>,
-    deferred_eval_store: DeferredEvaluationStore
+    deferred_eval_store: DeferredEvaluationStore,
 }
 
 create_exception!(nac3artiq, CompileError, exceptions::PyException);
@@ -268,7 +268,7 @@ fn add_exceptions(
     composer: &mut TopLevelComposer,
     builtin_def: &mut HashMap<StrRef, DefinitionId>,
     builtin_ty: &mut HashMap<StrRef, Type>,
-    error_names: &[&str]
+    error_names: &[&str],
 ) -> Vec<Type> {
     let mut types = Vec::new();
     // note: this is only for builtin exceptions, i.e. the exception name is "0:{exn}"
@@ -281,7 +281,7 @@ fn add_exceptions(
             // constructor id
             def_id + 1,
             &mut composer.unifier,
-            &composer.primitives_ty
+            &composer.primitives_ty,
         );
         composer.definition_ast_list.push((Arc::new(RwLock::new(exception_class)), None));
         composer.definition_ast_list.push((Arc::new(RwLock::new(exception_fn)), None));
@@ -331,7 +331,8 @@ impl Nac3 {
                 },
                 Arc::new(GenCall::new(Box::new(move |ctx, _, fun, args, generator| {
                     let arg_ty = fun.0.args[0].ty;
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, arg_ty).unwrap();
+                    let arg =
+                        args[0].1.clone().to_basic_value_enum(ctx, generator, arg_ty).unwrap();
                     time_fns.emit_at_mu(ctx, arg);
                     Ok(None)
                 }))),
@@ -349,7 +350,8 @@ impl Nac3 {
                 },
                 Arc::new(GenCall::new(Box::new(move |ctx, _, fun, args, generator| {
                     let arg_ty = fun.0.args[0].ty;
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, arg_ty).unwrap();
+                    let arg =
+                        args[0].1.clone().to_basic_value_enum(ctx, generator, arg_ty).unwrap();
                     time_fns.emit_delay_mu(ctx, arg);
                     Ok(None)
                 }))),
@@ -363,8 +365,9 @@ impl Nac3 {
         let types_mod = PyModule::import(py, "types").unwrap();
 
         let get_id = |x| id_fn.call1((x,)).unwrap().extract().unwrap();
-        let get_attr_id = |obj: &PyModule, attr| id_fn.call1((obj.getattr(attr).unwrap(),))
-            .unwrap().extract().unwrap();
+        let get_attr_id = |obj: &PyModule, attr| {
+            id_fn.call1((obj.getattr(attr).unwrap(),)).unwrap().extract().unwrap()
+        };
         let primitive_ids = PrimitivePythonId {
             virtual_id: get_id(
                 builtins_mod
@@ -373,8 +376,8 @@ impl Nac3 {
                     .call0()
                     .unwrap()
                     .get_item("virtual")
-                            .unwrap(
-                        )),
+                    .unwrap(),
+            ),
             generic_alias: (
                 get_attr_id(typing_mod, "_GenericAlias"),
                 get_attr_id(types_mod, "GenericAlias"),
@@ -519,8 +522,9 @@ impl Nac3 {
             let class_obj;
             if let StmtKind::ClassDef { name, .. } = &stmt.node {
                 let class = py_module.getattr(name.to_string()).unwrap();
-                if issubclass.call1((class, exn_class)).unwrap().extract().unwrap() &&
-                    class.getattr("artiq_builtin").is_err() {
+                if issubclass.call1((class, exn_class)).unwrap().extract().unwrap()
+                    && class.getattr("artiq_builtin").is_err()
+                {
                     class_obj = Some(class);
                 } else {
                     class_obj = None;
@@ -566,13 +570,12 @@ impl Nac3 {
             let (name, def_id, ty) = composer
                 .register_top_level(stmt.clone(), Some(resolver.clone()), path.clone())
                 .map_err(|e| {
-                    CompileError::new_err(format!(
-                        "compilation failed\n----------\n{}",
-                        e
-                    ))
+                    CompileError::new_err(format!("compilation failed\n----------\n{}", e))
                 })?;
             if let Some(class_obj) = class_obj {
-                self.exception_ids.write().insert(def_id.0, store_obj.call1(py, (class_obj, ))?.extract(py)?);
+                self.exception_ids
+                    .write()
+                    .insert(def_id.0, store_obj.call1(py, (class_obj,))?.extract(py)?);
             }
 
             match &stmt.node {
@@ -642,7 +645,8 @@ impl Nac3 {
             exception_ids: self.exception_ids.clone(),
             deferred_eval_store: self.deferred_eval_store.clone(),
         });
-        let resolver = Arc::new(Resolver(inner_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
+        let resolver =
+            Arc::new(Resolver(inner_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
         let (_, def_id, _) = composer
             .register_top_level(synthesized.pop().unwrap(), Some(resolver.clone()), "".into())
             .unwrap();
@@ -651,8 +655,12 @@ impl Nac3 {
             FunSignature { args: vec![], ret: self.primitive.none, vars: HashMap::new() };
         let mut store = ConcreteTypeStore::new();
         let mut cache = HashMap::new();
-        let signature =
-            store.from_signature(&mut composer.unifier, &self.primitive, &fun_signature, &mut cache);
+        let signature = store.from_signature(
+            &mut composer.unifier,
+            &self.primitive,
+            &fun_signature,
+            &mut cache,
+        );
         let signature = store.add_cty(signature);
 
         if let Err(e) = composer.start_analysis(true) {
@@ -738,8 +746,12 @@ impl Nac3 {
 
         let mut store = ConcreteTypeStore::new();
         let mut cache = HashMap::new();
-        let signature =
-            store.from_signature(&mut composer.unifier, &self.primitive, &fun_signature, &mut cache);
+        let signature = store.from_signature(
+            &mut composer.unifier,
+            &self.primitive,
+            &fun_signature,
+            &mut cache,
+        );
         let signature = store.add_cty(signature);
         let attributes_writeback_task = CodeGenTask {
             subst: Default::default(),
@@ -777,14 +789,23 @@ impl Nac3 {
             registry.add_task(task);
             registry.wait_tasks_complete(handles);
 
-            let mut generator = ArtiqCodeGenerator::new("attributes_writeback".to_string(), size_t, self.time_fns);
+            let mut generator =
+                ArtiqCodeGenerator::new("attributes_writeback".to_string(), size_t, self.time_fns);
             let context = inkwell::context::Context::create();
             let module = context.create_module("attributes_writeback");
             let builder = context.create_builder();
-            let (_, module, _) = gen_func_impl(&context, &mut generator, &registry, builder, module,
-                attributes_writeback_task, |generator, ctx| {
+            let (_, module, _) = gen_func_impl(
+                &context,
+                &mut generator,
+                &registry,
+                builder,
+                module,
+                attributes_writeback_task,
+                |generator, ctx| {
                     attributes_writeback(ctx, generator, inner_resolver.as_ref(), host_attributes)
-                }).unwrap();
+                },
+            )
+            .unwrap();
             let buffer = module.write_bitcode_to_memory();
             let buffer = buffer.as_slice().into();
             membuffer.lock().push(buffer);
@@ -800,13 +821,22 @@ impl Nac3 {
                 .create_module_from_ir(MemoryBuffer::create_from_memory_range(buffer, "main"))
                 .unwrap();
 
-            main.link_in_module(other)
-                .map_err(|err| CompileError::new_err(err.to_string()))?;
+            main.link_in_module(other).map_err(|err| CompileError::new_err(err.to_string()))?;
         }
         let builder = context.create_builder();
-        let modinit_return = main.get_function("__modinit__").unwrap().get_last_basic_block().unwrap().get_terminator().unwrap();
+        let modinit_return = main
+            .get_function("__modinit__")
+            .unwrap()
+            .get_last_basic_block()
+            .unwrap()
+            .get_terminator()
+            .unwrap();
         builder.position_before(&modinit_return);
-        builder.build_call(main.get_function("attributes_writeback").unwrap(), &[], "attributes_writeback");
+        builder.build_call(
+            main.get_function("attributes_writeback").unwrap(),
+            &[],
+            "attributes_writeback",
+        );
 
         main.link_in_module(load_irrt(&context))
             .map_err(|err| CompileError::new_err(err.to_string()))?;
@@ -880,9 +910,7 @@ impl Nac3 {
                 return Err(CompileError::new_err("failed to start linker"));
             }
         } else {
-            return Err(CompileError::new_err(
-                "linker returned non-zero status code",
-            ));
+            return Err(CompileError::new_err("linker returned non-zero status code"));
         }
 
         Ok(())

nac3artiq/src/symbol_resolver.rs

@@ -17,9 +17,9 @@ use pyo3::{
 use std::{
     collections::HashMap,
     sync::{
+        atomic::{AtomicBool, Ordering::Relaxed},
         Arc,
-        atomic::{AtomicBool, Ordering::Relaxed}
-    }
+    },
 };
 
 use crate::PrimitivePythonId;
@@ -153,7 +153,8 @@ impl StaticValue for PythonValue {
             self.resolver
                 .get_obj_value(py, self.value.as_ref(py), ctx, generator, expected_ty)
                 .map(Option::unwrap)
-        }).map_err(|e| e.to_string())
+        })
+        .map_err(|e| e.to_string())
     }
 
     fn get_field<'ctx, 'a>(
@@ -175,9 +176,9 @@ impl StaticValue for PythonValue {
                     let obj = self.value.getattr(py, &name.to_string())?;
                     let id = self.resolver.helper.id_fn.call1(py, (&obj,))?.extract(py)?;
                     if self.id == self.resolver.primitive_ids.none {
-                        return Ok(None)
+                        return Ok(None);
                     } else {
-                        return Ok(Some((id, obj)))
+                        return Ok(Some((id, obj)));
                     }
                 }
                 let def_id = { *self.resolver.pyid_to_def.read().get(&ty_id).unwrap() };
@@ -384,10 +385,10 @@ impl InnerResolver {
                     }
                 }
                 if needs_defer {
-                    self.deferred_eval_store.store.write()
-                        .push((result.clone(),
+                    self.deferred_eval_store.store.write().push((
+                        result.clone(),
                         constraints.extract()?,
-                               pyty.getattr("__name__")?.extract::<String>()?
+                        pyty.getattr("__name__")?.extract::<String>()?,
                     ))
                 }
                 result
@@ -531,10 +532,7 @@ impl InnerResolver {
             let str_fn =
                 pyo3::types::PyModule::import(py, "builtins").unwrap().getattr("repr").unwrap();
             let str_repr: String = str_fn.call1((pyty,)).unwrap().extract().unwrap();
-            Ok(Err(format!(
-                "{} is not registered with NAC3 (@nac3 decorator missing?)",
-                str_repr
-            )))
+            Ok(Err(format!("{} is not registered with NAC3 (@nac3 decorator missing?)", str_repr)))
         }
     }
 
@@ -549,7 +547,7 @@ impl InnerResolver {
         let ty = self.helper.type_fn.call1(py, (obj,)).unwrap();
         let py_obj_id: u64 = self.helper.id_fn.call1(py, (obj,))?.extract(py)?;
         if let Some(ty) = self.pyid_to_type.read().get(&py_obj_id) {
-            return Ok(Ok(*ty))
+            return Ok(Ok(*ty));
         }
         let (extracted_ty, inst_check) = match self.get_pyty_obj_type(
             py,
@@ -616,7 +614,7 @@ impl InnerResolver {
                 let field_data = match obj.getattr("_nac3_option") {
                     Ok(d) => d,
                     // we use `none = Option(None)`, so the obj always have attr `_nac3_option`
-                    Err(_) => unreachable!("cannot be None")
+                    Err(_) => unreachable!("cannot be None"),
                 };
                 // if is `none`
                 let zelf_id: u64 = self.helper.id_fn.call1(py, (obj,))?.extract(py)?;
@@ -627,7 +625,9 @@ impl InnerResolver {
                         let var_map = params
                             .iter()
                             .map(|(id_var, ty)| {
-                                if let TypeEnum::TVar { id, range, name, loc, .. } = &*unifier.get_ty(*ty) {
+                                if let TypeEnum::TVar { id, range, name, loc, .. } =
+                                    &*unifier.get_ty(*ty)
+                                {
                                     assert_eq!(*id, *id_var);
                                     (*id, unifier.get_fresh_var_with_range(range, *name, *loc).0)
                                 } else {
@@ -635,7 +635,7 @@ impl InnerResolver {
                                 }
                             })
                             .collect::<HashMap<_, _>>();
-                        return Ok(Ok(unifier.subst(primitives.option, &var_map).unwrap()))
+                        return Ok(Ok(unifier.subst(primitives.option, &var_map).unwrap()));
                     } else {
                         unreachable!("must be tobj")
                     }
@@ -659,9 +659,7 @@ impl InnerResolver {
                 let var_map = params
                     .iter()
                     .map(|(id_var, ty)| {
-                        if let TypeEnum::TVar { id, range, name, loc, .. } =
-                            &*unifier.get_ty(*ty)
-                        {
+                        if let TypeEnum::TVar { id, range, name, loc, .. } = &*unifier.get_ty(*ty) {
                             assert_eq!(*id, *id_var);
                             (*id, unifier.get_fresh_var_with_range(range, *name, *loc).0)
                         } else {
@@ -706,14 +704,15 @@ impl InnerResolver {
                             return Ok(Err("object is not of concrete type".into()));
                         }
                     }
-                    let extracted_ty = unifier.subst(extracted_ty, &var_map).unwrap_or(extracted_ty);
+                    let extracted_ty =
+                        unifier.subst(extracted_ty, &var_map).unwrap_or(extracted_ty);
                     Ok(Ok(extracted_ty))
                 };
                 let result = instantiate_obj();
                 // update/remove the cache according to the result
                 match result {
                     Ok(Ok(ty)) => self.pyid_to_type.write().insert(py_obj_id, ty),
-                    _ => self.pyid_to_type.write().remove(&py_obj_id)
+                    _ => self.pyid_to_type.write().remove(&py_obj_id),
                 };
                 result
             }
@@ -722,32 +721,32 @@ impl InnerResolver {
                 if unifier.unioned(extracted_ty, primitives.int32) {
                     obj.extract::<i32>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of int32", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else if unifier.unioned(extracted_ty, primitives.int64) {
                     obj.extract::<i64>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of int64", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else if unifier.unioned(extracted_ty, primitives.uint32) {
                     obj.extract::<u32>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of uint32", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else if unifier.unioned(extracted_ty, primitives.uint64) {
                     obj.extract::<u64>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of uint64", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else if unifier.unioned(extracted_ty, primitives.bool) {
                     obj.extract::<bool>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of bool", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else if unifier.unioned(extracted_ty, primitives.float) {
                     obj.extract::<f64>().map_or_else(
                         |_| Ok(Err(format!("{} is not in the range of float64", obj))),
-                        |_| Ok(Ok(extracted_ty))
+                        |_| Ok(Ok(extracted_ty)),
                     )
                 } else {
                     Ok(Ok(extracted_ty))
@@ -799,8 +798,8 @@ impl InnerResolver {
             }
 
             let len: usize = self.helper.len_fn.call1(py, (obj,))?.extract(py)?;
-            let elem_ty =
-                if let TypeEnum::TList { ty } = ctx.unifier.get_ty_immutable(expected_ty).as_ref()
+            let elem_ty = if let TypeEnum::TList { ty } =
+                ctx.unifier.get_ty_immutable(expected_ty).as_ref()
             {
                 *ty
             } else {
@@ -825,14 +824,15 @@ impl InnerResolver {
 
             let arr: Result<Option<Vec<_>>, _> = (0..len)
                 .map(|i| {
-                    obj
-                        .get_item(i)
-                        .and_then(|elem| self.get_obj_value(py, elem, ctx, generator, elem_ty)
-                        .map_err(
-                            |e| super::CompileError::new_err(
-                                format!("Error getting element {}: {}", i, e))
+                    obj.get_item(i).and_then(|elem| {
+                        self.get_obj_value(py, elem, ctx, generator, elem_ty).map_err(|e| {
+                            super::CompileError::new_err(format!(
+                                "Error getting element {}: {}",
+                                i, e
                             ))
                         })
+                    })
+                })
                 .collect();
             let arr = arr?.unwrap();
 
@@ -876,18 +876,19 @@ impl InnerResolver {
                 let tup_tys = ty.iter();
                 let elements: &PyTuple = obj.cast_as()?;
                 assert_eq!(elements.len(), tup_tys.len());
-                let val: Result<Option<Vec<_>>, _> =
-                    elements
+                let val: Result<Option<Vec<_>>, _> = elements
                     .iter()
                     .enumerate()
                     .zip(tup_tys)
-                        .map(|((i, elem), ty)| self
-                            .get_obj_value(py, elem, ctx, generator, *ty).map_err(|e|
-                                super::CompileError::new_err(
-                                    format!("Error getting element {}: {}", i, e)
-                                )
-                            )
-                        ).collect();
+                    .map(|((i, elem), ty)| {
+                        self.get_obj_value(py, elem, ctx, generator, *ty).map_err(|e| {
+                            super::CompileError::new_err(format!(
+                                "Error getting element {}: {}",
+                                i, e
+                            ))
+                        })
+                    })
+                    .collect();
                 let val = val?.unwrap();
                 let val = ctx.ctx.const_struct(&val, false);
                 Ok(Some(val.into()))
@@ -901,7 +902,7 @@ impl InnerResolver {
                 {
                     *params.iter().next().unwrap().1
                 }
-                _ => unreachable!("must be option type")
+                _ => unreachable!("must be option type"),
             };
             if id == self.primitive_ids.none {
                 // for option type, just a null ptr
@@ -913,7 +914,13 @@ impl InnerResolver {
                 ))
             } else {
                 match self
-                    .get_obj_value(py, obj.getattr("_nac3_option").unwrap(), ctx, generator, option_val_ty)
+                    .get_obj_value(
+                        py,
+                        obj.getattr("_nac3_option").unwrap(),
+                        ctx,
+                        generator,
+                        option_val_ty,
+                    )
                     .map_err(|e| {
                         super::CompileError::new_err(format!(
                             "Error getting value of Option object: {}",
@@ -924,18 +931,27 @@ impl InnerResolver {
                         let global_str = format!("{}_option", id);
                         {
                             if self.global_value_ids.read().contains_key(&id) {
-                                let global = ctx.module.get_global(&global_str).unwrap_or_else(|| {
-                                    ctx.module.add_global(v.get_type(), Some(AddressSpace::Generic), &global_str)
+                                let global =
+                                    ctx.module.get_global(&global_str).unwrap_or_else(|| {
+                                        ctx.module.add_global(
+                                            v.get_type(),
+                                            Some(AddressSpace::Generic),
+                                            &global_str,
+                                        )
                                     });
                                 return Ok(Some(global.as_pointer_value().into()));
                             } else {
                                 self.global_value_ids.write().insert(id, obj.into());
                             }
                         }
-                        let global = ctx.module.add_global(v.get_type(), Some(AddressSpace::Generic), &global_str);
+                        let global = ctx.module.add_global(
+                            v.get_type(),
+                            Some(AddressSpace::Generic),
+                            &global_str,
+                        );
                         global.set_initializer(&v);
                         Ok(Some(global.as_pointer_value().into()))
-                    },
+                    }
                     None => Ok(None),
                 }
             }
@@ -973,7 +989,12 @@ impl InnerResolver {
                     .iter()
                     .map(|(name, ty, _)| {
                         self.get_obj_value(py, obj.getattr(&name.to_string())?, ctx, generator, *ty)
-                            .map_err(|e| super::CompileError::new_err(format!("Error getting field {}: {}", name, e)))
+                            .map_err(|e| {
+                                super::CompileError::new_err(format!(
+                                    "Error getting field {}: {}",
+                                    name, e
+                                ))
+                            })
                     })
                     .collect();
                 let values = values?;
@@ -1028,8 +1049,7 @@ impl InnerResolver {
             if id == self.primitive_ids.none {
                 Ok(SymbolValue::OptionNone)
             } else {
-                self
-                    .get_default_param_obj_value(py, obj.getattr("_nac3_option").unwrap())?
+                self.get_default_param_obj_value(py, obj.getattr("_nac3_option").unwrap())?
                     .map(|v| SymbolValue::OptionSome(Box::new(v)))
             }
         } else {
@@ -1184,7 +1204,7 @@ impl SymbolResolver for Resolver {
         &self,
         unifier: &mut Unifier,
         defs: &[Arc<RwLock<TopLevelDef>>],
-        primitives: &PrimitiveStore
+        primitives: &PrimitiveStore,
     ) -> Result<(), String> {
         // we don't need a lock because this will only be run in a single thread
         if self.0.deferred_eval_store.needs_defer.load(Relaxed) {
@@ -1214,7 +1234,8 @@ impl SymbolResolver for Resolver {
                     }
                 }
                 Ok(Ok(()))
-            }).unwrap()?
+            })
+            .unwrap()?
         }
         Ok(())
     }

nac3ast/src/constant.rs

@@ -85,14 +85,10 @@ impl<U> crate::fold::Fold<U> for ConstantOptimizer {
     fn fold_expr(&mut self, node: crate::Expr<U>) -> Result<crate::Expr<U>, Self::Error> {
         match node.node {
             crate::ExprKind::Tuple { elts, ctx } => {
-                let elts = elts
-                    .into_iter()
-                    .map(|x| self.fold_expr(x))
-                    .collect::<Result<Vec<_>, _>>()?;
-                let expr = if elts
-                    .iter()
-                    .all(|e| matches!(e.node, crate::ExprKind::Constant { .. }))
-                {
+                let elts =
+                    elts.into_iter().map(|x| self.fold_expr(x)).collect::<Result<Vec<_>, _>>()?;
+                let expr =
+                    if elts.iter().all(|e| matches!(e.node, crate::ExprKind::Constant { .. })) {
                         let tuple = elts
                             .into_iter()
                             .map(|e| match e.node {
@@ -100,18 +96,11 @@ impl<U> crate::fold::Fold<U> for ConstantOptimizer {
                                 _ => unreachable!(),
                             })
                             .collect();
-                    crate::ExprKind::Constant {
-                        value: Constant::Tuple(tuple),
-                        kind: None,
-                    }
+                        crate::ExprKind::Constant { value: Constant::Tuple(tuple), kind: None }
                     } else {
                         crate::ExprKind::Tuple { elts, ctx }
                     };
-                Ok(crate::Expr {
-                    node: expr,
-                    custom: node.custom,
-                    location: node.location,
-                })
+                Ok(crate::Expr { node: expr, custom: node.custom, location: node.location })
             }
             _ => crate::fold::fold_expr(self, node),
         }
@@ -138,18 +127,12 @@ mod tests {
                     Located {
                         location,
                         custom,
-                        node: ExprKind::Constant {
-                            value: 1.into(),
-                            kind: None,
-                        },
+                        node: ExprKind::Constant { value: 1.into(), kind: None },
                     },
                     Located {
                         location,
                         custom,
-                        node: ExprKind::Constant {
-                            value: 2.into(),
-                            kind: None,
-                        },
+                        node: ExprKind::Constant { value: 2.into(), kind: None },
                     },
                     Located {
                         location,
@@ -160,26 +143,17 @@ mod tests {
                                 Located {
                                     location,
                                     custom,
-                                    node: ExprKind::Constant {
-                                        value: 3.into(),
-                                        kind: None,
-                                    },
+                                    node: ExprKind::Constant { value: 3.into(), kind: None },
                                 },
                                 Located {
                                     location,
                                     custom,
-                                    node: ExprKind::Constant {
-                                        value: 4.into(),
-                                        kind: None,
-                                    },
+                                    node: ExprKind::Constant { value: 4.into(), kind: None },
                                 },
                                 Located {
                                     location,
                                     custom,
-                                    node: ExprKind::Constant {
-                                        value: 5.into(),
-                                        kind: None,
-                                    },
+                                    node: ExprKind::Constant { value: 5.into(), kind: None },
                                 },
                             ],
                         },
@@ -187,9 +161,7 @@ mod tests {
                 ],
             },
         };
-        let new_ast = ConstantOptimizer::new()
-            .fold_expr(ast)
-            .unwrap_or_else(|e| match e {});
+        let new_ast = ConstantOptimizer::new().fold_expr(ast).unwrap_or_else(|e| match e {});
         assert_eq!(
             new_ast,
             Located {
@@ -199,11 +171,7 @@ mod tests {
                     value: Constant::Tuple(vec![
                         1.into(),
                         2.into(),
-                        Constant::Tuple(vec![
-                            3.into(),
-                            4.into(),
-                            5.into(),
-                        ])
+                        Constant::Tuple(vec![3.into(), 4.into(), 5.into(),])
                     ]),
                     kind: None
                 },

nac3ast/src/fold_helpers.rs

@@ -64,11 +64,4 @@ macro_rules! simple_fold {
     };
 }
 
-simple_fold!(
-    usize,
-    String,
-    bool,
-    StrRef,
-    constant::Constant,
-    constant::ConversionFlag
-);
+simple_fold!(usize, String, bool, StrRef, constant::Constant, constant::ConversionFlag);

nac3ast/src/impls.rs

@@ -34,10 +34,7 @@ impl<U> ExprKind<U> {
             ExprKind::Starred { .. } => "starred",
             ExprKind::Slice { .. } => "slice",
             ExprKind::JoinedStr { values } => {
-                if values
-                    .iter()
-                    .any(|e| matches!(e.node, ExprKind::JoinedStr { .. }))
-                {
+                if values.iter().any(|e| matches!(e.node, ExprKind::JoinedStr { .. })) {
                     "f-string expression"
                 } else {
                     "literal"

nac3ast/src/lib.rs

@@ -9,6 +9,6 @@ mod impls;
 mod location;
 
 pub use ast_gen::*;
-pub use location::{Location, FileName};
+pub use location::{FileName, Location};
 
 pub type Suite<U = ()> = Vec<Stmt<U>>;

nac3ast/src/location.rs

@@ -21,7 +21,7 @@ impl From<String> for FileName {
 pub struct Location {
     pub row: usize,
     pub column: usize,
-    pub file: FileName
+    pub file: FileName,
 }
 
 impl fmt::Display for Location {
@@ -53,11 +53,7 @@ impl Location {
                 )
             }
         }
-        Visualize {
-            loc: *self,
-            line,
-            desc,
-        }
+        Visualize { loc: *self, line, desc }
     }
 }
 

nac3core/Cargo.toml

@@ -15,7 +15,7 @@ nac3parser = { path = "../nac3parser" }
 git = "https://github.com/nbaksalyar/inkwell.git"
 branch = "llvm14"
 default-features = false
-features = ["llvm14-0", "target-x86", "target-arm", "target-riscv", "no-libffi-linking"]
+features = ["llvm14-0", "target-aarch64", "target-arm", "target-riscv", "no-libffi-linking"]
 
 [dev-dependencies]
 test-case = "1.2.0"

nac3core/build.rs

@@ -18,17 +18,8 @@ fn main() {
      * Compiling for WASM32 and filtering the output with regex is the closest we can get.
      */
 
-    const FLAG: &[&str] = &[
-        "--target=wasm32",
-        FILE,
-        "-O3",
-        "-emit-llvm",
-        "-S",
-        "-Wall",
-        "-Wextra",
-        "-o",
-        "-",
-    ];
+    const FLAG: &[&str] =
+        &["--target=wasm32", FILE, "-O3", "-emit-llvm", "-S", "-Wall", "-Wextra", "-o", "-"];
     let output = Command::new("clang")
         .args(FLAG)
         .output()

nac3core/src/codegen/expr.rs

@@ -11,22 +11,22 @@ use crate::{
     symbol_resolver::{SymbolValue, ValueEnum},
     toplevel::{DefinitionId, TopLevelDef},
     typecheck::{
+        magic_methods::{binop_assign_name, binop_name},
         typedef::{FunSignature, FuncArg, Type, TypeEnum, Unifier},
-        magic_methods::{binop_name, binop_assign_name},
     },
 };
 use inkwell::{
-    AddressSpace,
     attributes::{Attribute, AttributeLoc},
     types::{AnyType, BasicType, BasicTypeEnum},
-    values::{BasicValueEnum, FunctionValue, IntValue, PointerValue}
+    values::{BasicValueEnum, FunctionValue, IntValue, PointerValue},
+    AddressSpace,
 };
 use itertools::{chain, izip, zip, Itertools};
 use nac3parser::ast::{
     self, Boolop, Comprehension, Constant, Expr, ExprKind, Location, Operator, StrRef,
 };
 
-use super::{CodeGenerator, need_sret};
+use super::{need_sret, CodeGenerator};
 
 pub fn get_subst_key(
     unifier: &mut Unifier,
@@ -241,7 +241,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
         op: &Operator,
         lhs: BasicValueEnum<'ctx>,
         rhs: BasicValueEnum<'ctx>,
-        signed: bool
+        signed: bool,
     ) -> BasicValueEnum<'ctx> {
         let (lhs, rhs) =
             if let (BasicValueEnum::IntValue(lhs), BasicValueEnum::IntValue(rhs)) = (lhs, rhs) {
@@ -270,9 +270,15 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
             (Operator::BitXor, _) => self.builder.build_xor(lhs, rhs, "xor").into(),
             (Operator::BitAnd, _) => self.builder.build_and(lhs, rhs, "and").into(),
             (Operator::LShift, _) => self.builder.build_left_shift(lhs, rhs, "lshift").into(),
-            (Operator::RShift, _) => self.builder.build_right_shift(lhs, rhs, true, "rshift").into(),
-            (Operator::FloorDiv, true) => self.builder.build_int_signed_div(lhs, rhs, "floordiv").into(),
-            (Operator::FloorDiv, false) => self.builder.build_int_unsigned_div(lhs, rhs, "floordiv").into(),
+            (Operator::RShift, _) => {
+                self.builder.build_right_shift(lhs, rhs, true, "rshift").into()
+            }
+            (Operator::FloorDiv, true) => {
+                self.builder.build_int_signed_div(lhs, rhs, "floordiv").into()
+            }
+            (Operator::FloorDiv, false) => {
+                self.builder.build_int_unsigned_div(lhs, rhs, "floordiv").into()
+            }
             (Operator::Pow, s) => integer_power(generator, self, lhs, rhs, s).into(),
             // special implementation?
             (Operator::MatMult, _) => unreachable!(),
@@ -340,15 +346,25 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
             let byval_id = Attribute::get_named_enum_kind_id("byval");
 
             let offset = if fun.get_enum_attribute(AttributeLoc::Param(0), sret_id).is_some() {
-                return_slot = Some(self.builder.build_alloca(fun.get_type().get_param_types()[0]
-                        .into_pointer_type().get_element_type().into_struct_type(), call_name));
+                return_slot = Some(
+                    self.builder.build_alloca(
+                        fun.get_type().get_param_types()[0]
+                            .into_pointer_type()
+                            .get_element_type()
+                            .into_struct_type(),
+                        call_name,
+                    ),
+                );
                 loc_params.push((*return_slot.as_ref().unwrap()).into());
                 1
             } else {
                 0
             };
             for (i, param) in params.iter().enumerate() {
-                if fun.get_enum_attribute(AttributeLoc::Param((i + offset) as u32), byval_id).is_some() {
+                if fun
+                    .get_enum_attribute(AttributeLoc::Param((i + offset) as u32), byval_id)
+                    .is_some()
+                {
                     // lazy update
                     if loc_params.is_empty() {
                         loc_params.extend(params[0..i + offset].iter().copied());
@@ -361,11 +377,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
                 }
             }
         }
-        let params = if loc_params.is_empty() {
-            params
-        } else {
-            &loc_params
-        };
+        let params = if loc_params.is_empty() { params } else { &loc_params };
         let result = if let Some(target) = self.unwind_target {
             let current = self.builder.get_insert_block().unwrap().get_parent().unwrap();
             let then_block = self.ctx.append_basic_block(current, &format!("after.{}", call_name));
@@ -496,7 +508,10 @@ pub fn gen_constructor<'ctx, 'a, G: CodeGenerator>(
     match def {
         TopLevelDef::Class { methods, .. } => {
             // TODO: what about other fields that require alloca?
-            let fun_id = methods.iter().find(|method| method.0 == "__init__".into()).and_then(|method| Some(method.2));
+            let fun_id = methods
+                .iter()
+                .find(|method| method.0 == "__init__".into())
+                .and_then(|method| Some(method.2));
             let ty = ctx.get_llvm_type(generator, signature.ret).into_pointer_type();
             let zelf_ty: BasicTypeEnum = ty.get_element_type().try_into().unwrap();
             let zelf: BasicValueEnum<'ctx> = ctx.builder.build_alloca(zelf_ty, "alloca").into();
@@ -636,8 +651,12 @@ pub fn gen_call<'ctx, 'a, G: CodeGenerator>(
                     );
                 }
                 // reorder the parameters
-                let mut real_params =
-                    fun.0.args.iter().map(|arg| (mapping.remove(&arg.name).unwrap(), arg.ty)).collect_vec();
+                let mut real_params = fun
+                    .0
+                    .args
+                    .iter()
+                    .map(|arg| (mapping.remove(&arg.name).unwrap(), arg.ty))
+                    .collect_vec();
                 if let Some(obj) = &obj {
                     real_params.insert(0, (obj.1.clone(), obj.0));
                 }
@@ -700,32 +719,48 @@ pub fn gen_call<'ctx, 'a, G: CodeGenerator>(
         };
         let has_sret = ret_type.map_or(false, |ret_type| need_sret(ctx.ctx, ret_type));
         let mut byvals = Vec::new();
-        let mut params =
-            args.iter().enumerate().map(|(i, arg)| match ctx.get_llvm_type(generator, arg.ty) {
+        let mut params = args
+            .iter()
+            .enumerate()
+            .map(|(i, arg)| {
+                match ctx.get_llvm_type(generator, arg.ty) {
                     BasicTypeEnum::StructType(ty) if is_extern => {
                         byvals.push((i, ty));
                         ty.ptr_type(AddressSpace::Generic).into()
-                },
-                x => x
-            }.into()).collect_vec();
+                    }
+                    x => x,
+                }
+                .into()
+            })
+            .collect_vec();
         if has_sret {
             params.insert(0, ret_type.unwrap().ptr_type(AddressSpace::Generic).into());
         }
         let fun_ty = match ret_type {
             Some(ret_type) if !has_sret => ret_type.fn_type(&params, false),
-            _ => ctx.ctx.void_type().fn_type(&params, false)
+            _ => ctx.ctx.void_type().fn_type(&params, false),
         };
         let fun_val = ctx.module.add_function(&symbol, fun_ty, None);
         let offset = if has_sret {
-            fun_val.add_attribute(AttributeLoc::Param(0),
-                ctx.ctx.create_type_attribute(Attribute::get_named_enum_kind_id("sret"), ret_type.unwrap().as_any_type_enum()));
+            fun_val.add_attribute(
+                AttributeLoc::Param(0),
+                ctx.ctx.create_type_attribute(
+                    Attribute::get_named_enum_kind_id("sret"),
+                    ret_type.unwrap().as_any_type_enum(),
+                ),
+            );
             1
         } else {
             0
         };
         for (i, ty) in byvals {
-            fun_val.add_attribute(AttributeLoc::Param((i as u32) + offset),
-                ctx.ctx.create_type_attribute(Attribute::get_named_enum_kind_id("byval"), ty.as_any_type_enum()));
+            fun_val.add_attribute(
+                AttributeLoc::Param((i as u32) + offset),
+                ctx.ctx.create_type_attribute(
+                    Attribute::get_named_enum_kind_id("byval"),
+                    ty.as_any_type_enum(),
+                ),
+            );
         }
         fun_val
     });
@@ -789,7 +824,11 @@ pub fn gen_comprehension<'ctx, 'a, G: CodeGenerator>(
         let cont_bb = ctx.ctx.append_basic_block(current, "cont");
 
         let Comprehension { target, iter, ifs, .. } = &generators[0];
-        let iter_val = generator.gen_expr(ctx, iter)?.unwrap().to_basic_value_enum(ctx, generator, iter.custom.unwrap())?;
+        let iter_val = generator.gen_expr(ctx, iter)?.unwrap().to_basic_value_enum(
+            ctx,
+            generator,
+            iter.custom.unwrap(),
+        )?;
         let int32 = ctx.ctx.i32_type();
         let size_t = generator.get_size_type(ctx.ctx);
         let zero_size_t = size_t.const_zero();
@@ -930,14 +969,16 @@ pub fn gen_binop_expr<'ctx, 'a, G: CodeGenerator>(
 ) -> Result<Option<ValueEnum<'ctx>>, String> {
     let ty1 = ctx.unifier.get_representative(left.custom.unwrap());
     let ty2 = ctx.unifier.get_representative(right.custom.unwrap());
-    let left_val = generator
-        .gen_expr(ctx, left)?
-        .unwrap()
-        .to_basic_value_enum(ctx, generator, left.custom.unwrap())?;
-    let right_val = generator
-        .gen_expr(ctx, right)?
-        .unwrap()
-        .to_basic_value_enum(ctx, generator, right.custom.unwrap())?;
+    let left_val = generator.gen_expr(ctx, left)?.unwrap().to_basic_value_enum(
+        ctx,
+        generator,
+        left.custom.unwrap(),
+    )?;
+    let right_val = generator.gen_expr(ctx, right)?.unwrap().to_basic_value_enum(
+        ctx,
+        generator,
+        right.custom.unwrap(),
+    )?;
 
     // we can directly compare the types, because we've got their representatives
     // which would be unchanged until further unification, which we would never do
@@ -957,7 +998,8 @@ pub fn gen_binop_expr<'ctx, 'a, G: CodeGenerator>(
             let ty = f64_t.fn_type(&[f64_t.into(), i32_t.into()], false);
             ctx.module.add_function("llvm.powi.f64.i32", ty, None)
         });
-        let res = ctx.builder
+        let res = ctx
+            .builder
             .build_call(pow_intr, &[left_val.into(), right_val.into()], "f_pow_i")
             .try_as_basic_value()
             .unwrap_left();
@@ -966,10 +1008,8 @@ pub fn gen_binop_expr<'ctx, 'a, G: CodeGenerator>(
         let (op_name, id) = if let TypeEnum::TObj { fields, obj_id, .. } =
             ctx.unifier.get_ty_immutable(left.custom.unwrap()).as_ref()
         {
-            let (binop_name, binop_assign_name) = (
-                binop_name(op).into(),
-                binop_assign_name(op).into()
-            );
+            let (binop_name, binop_assign_name) =
+                (binop_name(op).into(), binop_assign_name(op).into());
             // if is aug_assign, try aug_assign operator first
             if is_aug_assign && fields.contains_key(&binop_assign_name) {
                 (binop_assign_name, *obj_id)
@@ -994,7 +1034,7 @@ pub fn gen_binop_expr<'ctx, 'a, G: CodeGenerator>(
                 } else {
                     unreachable!("must be tobj")
                 }
-            },
+            }
         };
         let fun_id = {
             let defs = ctx.top_level.definitions.read();
@@ -1011,7 +1051,8 @@ pub fn gen_binop_expr<'ctx, 'a, G: CodeGenerator>(
                 Some((left.custom.unwrap(), left_val.into())),
                 (&signature, fun_id),
                 vec![(None, right_val.into())],
-            ).map(|f| f.map(|f| f.into()))
+            )
+            .map(|f| f.map(|f| f.into()))
     }
 }
 
@@ -1033,14 +1074,14 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                 ctx.unifier.get_ty(expr.custom.unwrap()).as_ref(),
                 ctx.unifier.get_ty(ctx.primitives.option).as_ref(),
             ) {
-                (
-                    TypeEnum::TObj { obj_id, params, .. },
-                    TypeEnum::TObj { obj_id: opt_id, .. },
-                ) if *obj_id == *opt_id => ctx
-                    .get_llvm_type(generator, *params.iter().next().unwrap().1)
+                (TypeEnum::TObj { obj_id, params, .. }, TypeEnum::TObj { obj_id: opt_id, .. })
+                    if *obj_id == *opt_id =>
+                {
+                    ctx.get_llvm_type(generator, *params.iter().next().unwrap().1)
                         .ptr_type(AddressSpace::Generic)
                         .const_null()
-                    .into(),
+                        .into()
+                }
                 _ => unreachable!("must be option type"),
             }
         }
@@ -1058,12 +1099,9 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
             let elements = elts
                 .iter()
                 .map(|x| {
-                    generator
-                        .gen_expr(ctx, x)
-                        .map_or_else(
-                            Err,
-                            |v| v.unwrap().to_basic_value_enum(ctx, generator, x.custom.unwrap())
-                        )
+                    generator.gen_expr(ctx, x).map_or_else(Err, |v| {
+                        v.unwrap().to_basic_value_enum(ctx, generator, x.custom.unwrap())
+                    })
                 })
                 .collect::<Result<Vec<_>, _>>()?;
             let ty = if elements.is_empty() {
@@ -1094,9 +1132,9 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
             let element_val = elts
                 .iter()
                 .map(|x| {
-                    generator
-                        .gen_expr(ctx, x)
-                        .map_or_else(Err, |v| v.unwrap().to_basic_value_enum(ctx, generator, x.custom.unwrap()))
+                    generator.gen_expr(ctx, x).map_or_else(Err, |v| {
+                        v.unwrap().to_basic_value_enum(ctx, generator, x.custom.unwrap())
+                    })
                 })
                 .collect::<Result<Vec<_>, _>>()?;
             let element_ty = element_val.iter().map(BasicValueEnum::get_type).collect_vec();
@@ -1117,14 +1155,17 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
         ExprKind::Attribute { value, attr, .. } => {
             // note that we would handle class methods directly in calls
             match generator.gen_expr(ctx, value)?.unwrap() {
-                ValueEnum::Static(v) => v.get_field(*attr, ctx).map_or_else(|| {
+                ValueEnum::Static(v) => v.get_field(*attr, ctx).map_or_else(
+                    || {
                         let v = v.to_basic_value_enum(ctx, generator, value.custom.unwrap())?;
                         let index = ctx.get_attr_index(value.custom.unwrap(), *attr);
                         Ok(ValueEnum::Dynamic(ctx.build_gep_and_load(
                             v.into_pointer_value(),
                             &[zero, int32.const_int(index as u64, false)],
                         ))) as Result<_, String>
-                }, Ok)?,
+                    },
+                    Ok,
+                )?,
                 ValueEnum::Dynamic(v) => {
                     let index = ctx.get_attr_index(value.custom.unwrap(), *attr);
                     ValueEnum::Dynamic(ctx.build_gep_and_load(
@@ -1184,10 +1225,11 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
         }
         ExprKind::UnaryOp { op, operand } => {
             let ty = ctx.unifier.get_representative(operand.custom.unwrap());
-            let val =
-                generator.gen_expr(ctx, operand)?
-                .unwrap()
-                .to_basic_value_enum(ctx, generator, operand.custom.unwrap())?;
+            let val = generator.gen_expr(ctx, operand)?.unwrap().to_basic_value_enum(
+                ctx,
+                generator,
+                operand.custom.unwrap(),
+            )?;
             if ty == ctx.primitives.bool {
                 let val = val.into_int_value();
                 match op {
@@ -1244,14 +1286,16 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                 BasicValueEnum::IntValue(lhs),
                                 BasicValueEnum::IntValue(rhs),
                             ) = (
-                                generator
-                                    .gen_expr(ctx, lhs)?
-                                    .unwrap()
-                                    .to_basic_value_enum(ctx, generator, lhs.custom.unwrap())?,
-                                generator
-                                    .gen_expr(ctx, rhs)?
-                                    .unwrap()
-                                    .to_basic_value_enum(ctx, generator, rhs.custom.unwrap())?,
+                                generator.gen_expr(ctx, lhs)?.unwrap().to_basic_value_enum(
+                                    ctx,
+                                    generator,
+                                    lhs.custom.unwrap(),
+                                )?,
+                                generator.gen_expr(ctx, rhs)?.unwrap().to_basic_value_enum(
+                                    ctx,
+                                    generator,
+                                    rhs.custom.unwrap(),
+                                )?,
                             ) {
                                 (lhs, rhs)
                             } else {
@@ -1272,14 +1316,16 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                 BasicValueEnum::FloatValue(lhs),
                                 BasicValueEnum::FloatValue(rhs),
                             ) = (
-                                generator
-                                    .gen_expr(ctx, lhs)?
-                                    .unwrap()
-                                    .to_basic_value_enum(ctx, generator, lhs.custom.unwrap())?,
-                                generator
-                                    .gen_expr(ctx, rhs)?
-                                    .unwrap()
-                                    .to_basic_value_enum(ctx, generator, rhs.custom.unwrap())?,
+                                generator.gen_expr(ctx, lhs)?.unwrap().to_basic_value_enum(
+                                    ctx,
+                                    generator,
+                                    lhs.custom.unwrap(),
+                                )?,
+                                generator.gen_expr(ctx, rhs)?.unwrap().to_basic_value_enum(
+                                    ctx,
+                                    generator,
+                                    rhs.custom.unwrap(),
+                                )?,
                             ) {
                                 (lhs, rhs)
                             } else {
@@ -1337,7 +1383,8 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
             match result {
                 None => None,
                 Some(v) => {
-                    let b = b.unwrap().to_basic_value_enum(ctx, generator, orelse.custom.unwrap())?;
+                    let b =
+                        b.unwrap().to_basic_value_enum(ctx, generator, orelse.custom.unwrap())?;
                     Some(ctx.builder.build_store(v, b))
                 }
             };
@@ -1345,7 +1392,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
             ctx.builder.position_at_end(cont_bb);
             match result {
                 None => return Ok(None),
-                Some(v) => return Ok(Some(ctx.builder.build_load(v, "if_exp_val_load").into()))
+                Some(v) => return Ok(Some(ctx.builder.build_load(v, "if_exp_val_load").into())),
             }
         }
         ExprKind::Call { func, args, keywords } => {
@@ -1419,14 +1466,12 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                         .unwrap()
                                         .get_parent()
                                         .unwrap();
-                                    let unreachable_block = ctx.ctx.append_basic_block(
-                                        current_fun,
-                                        "unwrap_none_unreachable"
-                                    );
-                                    let exn_block = ctx.ctx.append_basic_block(
-                                        current_fun,
-                                        "unwrap_none_exception"
-                                    );
+                                    let unreachable_block = ctx
+                                        .ctx
+                                        .append_basic_block(current_fun, "unwrap_none_unreachable");
+                                    let exn_block = ctx
+                                        .ctx
+                                        .append_basic_block(current_fun, "unwrap_none_exception");
                                     ctx.builder.build_unconditional_branch(exn_block);
                                     ctx.builder.position_at_end(exn_block);
                                     ctx.raise_exn(
@@ -1434,22 +1479,24 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                         "0:UnwrapNoneError",
                                         err_msg,
                                         [None, None, None],
-                                        ctx.current_loc
+                                        ctx.current_loc,
                                     );
                                     ctx.builder.position_at_end(unreachable_block);
                                     let ptr = ctx
                                         .get_llvm_type(generator, value.custom.unwrap())
                                         .into_pointer_type()
                                         .const_null();
-                                    return Ok(Some(ctx.builder.build_load(
-                                        ptr,
-                                        "unwrap_none_unreachable_load"
-                                    ).into()));
+                                    return Ok(Some(
+                                        ctx.builder
+                                            .build_load(ptr, "unwrap_none_unreachable_load")
+                                            .into(),
+                                    ));
                                 }
                                 Some(v) => return Ok(Some(v)),
-                            }
+                            },
                             ValueEnum::Dynamic(BasicValueEnum::PointerValue(ptr)) => {
-                                let not_null = ctx.builder.build_is_not_null(ptr, "unwrap_not_null");
+                                let not_null =
+                                    ctx.builder.build_is_not_null(ptr, "unwrap_not_null");
                                 ctx.make_assert(
                                     generator,
                                     not_null,
@@ -1458,12 +1505,11 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                     [None, None, None],
                                     expr.location,
                                 );
-                                return Ok(Some(ctx.builder.build_load(
-                                    ptr,
-                                    "unwrap_some_load"
-                                ).into()))
+                                return Ok(Some(
+                                    ctx.builder.build_load(ptr, "unwrap_some_load").into(),
+                                ));
                             }
-                            _ => unreachable!("option must be static or ptr")
+                            _ => unreachable!("option must be static or ptr"),
                         }
                     }
                     return Ok(generator
@@ -1574,16 +1620,13 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                     } else {
                         unreachable!("tuple subscript must be const int after type check");
                     };
-                let v = generator
-                    .gen_expr(ctx, value)?
-                    .unwrap();
+                let v = generator.gen_expr(ctx, value)?.unwrap();
                 match v {
                     ValueEnum::Dynamic(v) => {
                         let v = v.into_struct_value();
                         ctx.builder.build_extract_value(v, index, "tup_elem").unwrap().into()
                     }
-                    ValueEnum::Static(v) => {
-                        match v.get_tuple_element(index) {
+                    ValueEnum::Static(v) => match v.get_tuple_element(index) {
                         Some(v) => v,
                         None => {
                             let tup = v
@@ -1591,13 +1634,12 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
                                 .into_struct_value();
                             ctx.builder.build_extract_value(tup, index, "tup_elem").unwrap().into()
                         }
-                        }
-                    }
+                    },
                 }
             } else {
                 unreachable!("should not be other subscriptable types after type check");
             }
-        },
+        }
         ExprKind::ListComp { .. } => gen_comprehension(generator, ctx, expr)?.into(),
         _ => unimplemented!(),
     }))

nac3core/src/codegen/irrt/irrt.c

@@ -1,9 +1,4 @@
-typedef _ExtInt(8) int8_t;
-typedef unsigned _ExtInt(8) uint8_t;
-typedef _ExtInt(32) int32_t;
-typedef unsigned _ExtInt(32) uint32_t;
-typedef _ExtInt(64) int64_t;
-typedef unsigned _ExtInt(64) uint64_t;
+#include "stdint.h"
 
 # define MAX(a, b) (a > b ? a : b)
 # define MIN(a, b) (a > b ? b : a)

nac3core/src/codegen/irrt/mod.rs

@@ -261,7 +261,11 @@ pub fn handle_slice_index_bound<'a, 'ctx, G: CodeGenerator>(
         ctx.module.add_function(SYMBOL, fn_t, None)
     });
 
-    let i = generator.gen_expr(ctx, i)?.unwrap().to_basic_value_enum(ctx, generator, i.custom.unwrap())?;
+    let i = generator.gen_expr(ctx, i)?.unwrap().to_basic_value_enum(
+        ctx,
+        generator,
+        i.custom.unwrap(),
+    )?;
     Ok(ctx
         .builder
         .build_call(func, &[i.into(), length.into()], "bounded_ind")
@@ -329,27 +333,19 @@ pub fn list_slice_assignment<'ctx, 'a>(
     // index in bound and positive should be done
     // assert if dest.step == 1 then len(src) <= len(dest) else len(src) == len(dest), and
     // throw exception if not satisfied
-    let src_end = ctx.builder
+    let src_end = ctx
+        .builder
         .build_select(
-            ctx.builder.build_int_compare(
-                inkwell::IntPredicate::SLT,
-                src_idx.2,
-                zero,
-                "is_neg",
-            ),
+            ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, src_idx.2, zero, "is_neg"),
             ctx.builder.build_int_sub(src_idx.1, one, "e_min_one"),
             ctx.builder.build_int_add(src_idx.1, one, "e_add_one"),
             "final_e",
         )
         .into_int_value();
-    let dest_end = ctx.builder
+    let dest_end = ctx
+        .builder
         .build_select(
-            ctx.builder.build_int_compare(
-                inkwell::IntPredicate::SLT,
-                dest_idx.2,
-                zero,
-                "is_neg",
-            ),
+            ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, dest_idx.2, zero, "is_neg"),
             ctx.builder.build_int_sub(dest_idx.1, one, "e_min_one"),
             ctx.builder.build_int_add(dest_idx.1, one, "e_add_one"),
             "final_e",

nac3core/src/codegen/mod.rs

@@ -8,8 +8,6 @@ use crate::{
 };
 use crossbeam::channel::{unbounded, Receiver, Sender};
 use inkwell::{
-    AddressSpace,
-    OptimizationLevel,
     attributes::{Attribute, AttributeLoc},
     basic_block::BasicBlock,
     builder::Builder,
@@ -17,10 +15,11 @@ use inkwell::{
     module::Module,
     passes::{PassManager, PassManagerBuilder},
     types::{AnyType, BasicType, BasicTypeEnum},
-    values::{BasicValueEnum, FunctionValue, PhiValue, PointerValue}
+    values::{BasicValueEnum, FunctionValue, PhiValue, PointerValue},
+    AddressSpace, OptimizationLevel,
 };
 use itertools::Itertools;
-use nac3parser::ast::{Stmt, StrRef, Location};
+use nac3parser::ast::{Location, Stmt, StrRef};
 use parking_lot::{Condvar, Mutex};
 use std::collections::{HashMap, HashSet};
 use std::sync::{
@@ -300,7 +299,10 @@ fn get_llvm_type<'ctx>(
                     &*definition.read()
                 {
                     let struct_type = ctx.opaque_struct_type(&name.to_string());
-                    type_cache.insert(unifier.get_representative(ty), struct_type.ptr_type(AddressSpace::Generic).into());
+                    type_cache.insert(
+                        unifier.get_representative(ty),
+                        struct_type.ptr_type(AddressSpace::Generic).into(),
+                    );
                     let fields = fields_list
                         .iter()
                         .map(|f| {
@@ -326,7 +328,11 @@ fn get_llvm_type<'ctx>(
                 // a struct with fields in the order present in the tuple
                 let fields = ty
                     .iter()
-                    .map(|ty| get_llvm_type(ctx, generator, unifier, top_level, type_cache, primitives, *ty))
+                    .map(|ty| {
+                        get_llvm_type(
+                            ctx, generator, unifier, top_level, type_cache, primitives, *ty,
+                        )
+                    })
                     .collect_vec();
                 ctx.struct_type(&fields, false).into()
             }
@@ -349,26 +355,35 @@ fn get_llvm_type<'ctx>(
 }
 
 fn need_sret<'ctx>(ctx: &'ctx Context, ty: BasicTypeEnum<'ctx>) -> bool {
-    fn need_sret_impl<'ctx>(ctx: &'ctx Context, ty: BasicTypeEnum<'ctx>, maybe_large: bool) -> bool {
+    fn need_sret_impl<'ctx>(
+        ctx: &'ctx Context,
+        ty: BasicTypeEnum<'ctx>,
+        maybe_large: bool,
+    ) -> bool {
         match ty {
             BasicTypeEnum::IntType(_) | BasicTypeEnum::PointerType(_) => false,
             BasicTypeEnum::FloatType(_) if maybe_large => false,
-            BasicTypeEnum::StructType(ty) if maybe_large && ty.count_fields() <= 2 =>
-                ty.get_field_types().iter().any(|ty| need_sret_impl(ctx, *ty, false)),
+            BasicTypeEnum::StructType(ty) if maybe_large && ty.count_fields() <= 2 => {
+                ty.get_field_types().iter().any(|ty| need_sret_impl(ctx, *ty, false))
+            }
             _ => true,
         }
     }
     need_sret_impl(ctx, ty, true)
 }
 
-pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenContext) -> Result<(), String>> (
+pub fn gen_func_impl<
+    'ctx,
+    G: CodeGenerator,
+    F: FnOnce(&mut G, &mut CodeGenContext) -> Result<(), String>,
+>(
     context: &'ctx Context,
     generator: &mut G,
     registry: &WorkerRegistry,
     builder: Builder<'ctx>,
     module: Module<'ctx>,
     task: CodeGenTask,
-    codegen_function: F
+    codegen_function: F,
 ) -> Result<(Builder<'ctx>, Module<'ctx>, FunctionValue<'ctx>), (Builder<'ctx>, String)> {
     let top_level_ctx = registry.top_level_ctx.clone();
     let static_value_store = registry.static_value_store.clone();
@@ -463,7 +478,15 @@ pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenConte
     let ret_type = if unifier.unioned(ret, primitives.none) {
         None
     } else {
-        Some(get_llvm_type(context, generator, &mut unifier, top_level_ctx.as_ref(), &mut type_cache, &primitives, ret))
+        Some(get_llvm_type(
+            context,
+            generator,
+            &mut unifier,
+            top_level_ctx.as_ref(),
+            &mut type_cache,
+            &primitives,
+            ret,
+        ))
     };
 
     let has_sret = ret_type.map_or(false, |ty| need_sret(context, ty));
@@ -489,7 +512,7 @@ pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenConte
 
     let fn_type = match ret_type {
         Some(ret_type) if !has_sret => ret_type.fn_type(&params, false),
-        _ => context.void_type().fn_type(&params, false)
+        _ => context.void_type().fn_type(&params, false),
     };
 
     let symbol = &task.symbol_name;
@@ -504,9 +527,13 @@ pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenConte
         fn_val.set_personality_function(personality);
     }
     if has_sret {
-        fn_val.add_attribute(AttributeLoc::Param(0),
-            context.create_type_attribute(Attribute::get_named_enum_kind_id("sret"),
-            ret_type.unwrap().as_any_type_enum()));
+        fn_val.add_attribute(
+            AttributeLoc::Param(0),
+            context.create_type_attribute(
+                Attribute::get_named_enum_kind_id("sret"),
+                ret_type.unwrap().as_any_type_enum(),
+            ),
+        );
     }
 
     let init_bb = context.append_basic_block(fn_val, "init");

nac3core/src/codegen/stmt.rs

@@ -87,19 +87,15 @@ pub fn gen_store_target<'ctx, 'a, G: CodeGenerator>(
                 .unwrap()
                 .to_basic_value_enum(ctx, generator, value.custom.unwrap())?
                 .into_pointer_value();
-            let len = ctx
-                .build_gep_and_load(v, &[zero, i32_type.const_int(1, false)])
-                .into_int_value();
+            let len =
+                ctx.build_gep_and_load(v, &[zero, i32_type.const_int(1, false)]).into_int_value();
             let raw_index = generator
                 .gen_expr(ctx, slice)?
                 .unwrap()
                 .to_basic_value_enum(ctx, generator, slice.custom.unwrap())?
                 .into_int_value();
-            let raw_index = ctx.builder.build_int_s_extend(
-                raw_index,
-                generator.get_size_type(ctx.ctx),
-                "sext",
-            );
+            let raw_index =
+                ctx.builder.build_int_s_extend(raw_index, generator.get_size_type(ctx.ctx), "sext");
             // handle negative index
             let is_negative = ctx.builder.build_int_compare(
                 inkwell::IntPredicate::SLT,
@@ -114,12 +110,8 @@ pub fn gen_store_target<'ctx, 'a, G: CodeGenerator>(
                 .into_int_value();
             // unsigned less than is enough, because negative index after adjustment is
             // bigger than the length (for unsigned cmp)
-            let bound_check = ctx.builder.build_int_compare(
-                inkwell::IntPredicate::ULT,
-                index,
-                len,
-                "inbound",
-            );
+            let bound_check =
+                ctx.builder.build_int_compare(inkwell::IntPredicate::ULT, index, len, "inbound");
             ctx.make_assert(
                 generator,
                 bound_check,
@@ -696,12 +688,15 @@ pub fn gen_try<'ctx, 'a, G: CodeGenerator>(
                     &mut ctx.unifier,
                     type_.custom.unwrap(),
                 );
-                let obj_id = if let TypeEnum::TObj { obj_id, .. } = &*ctx.unifier.get_ty(type_.custom.unwrap()) {
+                let obj_id = if let TypeEnum::TObj { obj_id, .. } =
+                    &*ctx.unifier.get_ty(type_.custom.unwrap())
+                {
                     *obj_id
                 } else {
                     unreachable!()
                 };
-                let exception_name = format!("{}:{}", ctx.resolver.get_exception_id(obj_id.0), exn_name);
+                let exception_name =
+                    format!("{}:{}", ctx.resolver.get_exception_id(obj_id.0), exn_name);
                 let exn_id = ctx.resolver.get_string_id(&exception_name);
                 let exn_id_global =
                     ctx.module.add_global(ctx.ctx.i32_type(), None, &format!("exn.{}", exn_id));
@@ -751,7 +746,9 @@ pub fn gen_try<'ctx, 'a, G: CodeGenerator>(
         let mut final_proxy_lambda =
             |ctx: &mut CodeGenContext<'ctx, 'a>,
              target: BasicBlock<'ctx>,
-             block: BasicBlock<'ctx>| final_proxy(ctx, target, block, final_data.as_mut().unwrap());
+             block: BasicBlock<'ctx>| {
+                final_proxy(ctx, target, block, final_data.as_mut().unwrap())
+            };
         let mut redirect_lambda = |ctx: &mut CodeGenContext<'ctx, 'a>,
                                    target: BasicBlock<'ctx>,
                                    block: BasicBlock<'ctx>| {
@@ -1059,7 +1056,7 @@ pub fn gen_stmt<'ctx, 'a, G: CodeGenerator>(
                 stmt.location,
             )
         }
-        _ => unimplemented!()
+        _ => unimplemented!(),
     };
     Ok(())
 }

nac3core/src/symbol_resolver.rs

@@ -160,7 +160,7 @@ pub trait SymbolResolver {
         &self,
         _unifier: &mut Unifier,
         _top_level_defs: &[Arc<RwLock<TopLevelDef>>],
-        _primitives: &PrimitiveStore
+        _primitives: &PrimitiveStore,
     ) -> Result<(), String> {
         Ok(())
     }

nac3core/src/toplevel/builtins.rs

@@ -14,7 +14,7 @@ pub fn get_exn_constructor(
     class_id: usize,
     cons_id: usize,
     unifier: &mut Unifier,
-    primitives: &PrimitiveStore
+    primitives: &PrimitiveStore,
 ) -> (TopLevelDef, TopLevelDef, Type, Type) {
     let int32 = primitives.int32;
     let int64 = primitives.int64;
@@ -225,11 +225,8 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, obj, _, _, generator| {
                     let expect_ty = obj.clone().unwrap().0;
-                    let obj_val = obj.unwrap().1.clone().to_basic_value_enum(
-                        ctx,
-                        generator,
-                        expect_ty,
-                    )?;
+                    let obj_val =
+                        obj.unwrap().1.clone().to_basic_value_enum(ctx, generator, expect_ty)?;
                     if let BasicValueEnum::PointerValue(ptr) = obj_val {
                         Ok(Some(ctx.builder.build_is_not_null(ptr, "is_some").into()))
                     } else {
@@ -250,11 +247,8 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, obj, _, _, generator| {
                     let expect_ty = obj.clone().unwrap().0;
-                    let obj_val = obj.unwrap().1.clone().to_basic_value_enum(
-                        ctx,
-                        generator,
-                        expect_ty,
-                    )?;
+                    let obj_val =
+                        obj.unwrap().1.clone().to_basic_value_enum(ctx, generator, expect_ty)?;
                     if let BasicValueEnum::PointerValue(ptr) = obj_val {
                         Ok(Some(ctx.builder.build_is_null(ptr, "is_none").into()))
                     } else {
@@ -272,11 +266,9 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             instance_to_symbol: Default::default(),
             instance_to_stmt: Default::default(),
             resolver: None,
-            codegen_callback: Some(Arc::new(GenCall::new(Box::new(
-                |_, _, _, _, _| {
+            codegen_callback: Some(Arc::new(GenCall::new(Box::new(|_, _, _, _, _| {
                 unreachable!("handled in gen_expr")
-                },
-            )))),
+            })))),
             loc: None,
         })),
         Arc::new(RwLock::new(TopLevelDef::Function {
@@ -567,7 +559,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let round_intrinsic =
                         ctx.module.get_function("llvm.round.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -607,7 +603,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let round_intrinsic =
                         ctx.module.get_function("llvm.round.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -668,13 +668,15 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
                     let ty_i32 = ctx.primitives.int32;
                     for (i, arg) in args.iter().enumerate() {
                         if arg.0 == Some("start".into()) {
-                            start = Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
+                            start =
+                                Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
                         } else if arg.0 == Some("stop".into()) {
                             stop = Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
                         } else if arg.0 == Some("step".into()) {
                             step = Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
                         } else if i == 0 {
-                            start = Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
+                            start =
+                                Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
                         } else if i == 1 {
                             stop = Some(arg.1.clone().to_basic_value_enum(ctx, generator, ty_i32)?);
                         } else if i == 2 {
@@ -829,7 +831,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let floor_intrinsic =
                         ctx.module.get_function("llvm.floor.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -869,7 +875,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let floor_intrinsic =
                         ctx.module.get_function("llvm.floor.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -909,7 +919,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let ceil_intrinsic =
                         ctx.module.get_function("llvm.ceil.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -949,7 +963,11 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
             resolver: None,
             codegen_callback: Some(Arc::new(GenCall::new(Box::new(
                 |ctx, _, _, args, generator| {
-                    let arg = args[0].1.clone().to_basic_value_enum(ctx, generator, ctx.primitives.float)?;
+                    let arg = args[0].1.clone().to_basic_value_enum(
+                        ctx,
+                        generator,
+                        ctx.primitives.float,
+                    )?;
                     let ceil_intrinsic =
                         ctx.module.get_function("llvm.ceil.f64").unwrap_or_else(|| {
                             let float = ctx.ctx.f64_type();
@@ -1005,7 +1023,10 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
                         Ok(if ctx.unifier.unioned(arg_ty, range_ty) {
                             let arg = arg.into_pointer_value();
                             let (start, end, step) = destructure_range(ctx, arg);
-                            Some(calculate_len_for_slice_range(generator, ctx, start, end, step).into())
+                            Some(
+                                calculate_len_for_slice_range(generator, ctx, start, end, step)
+                                    .into(),
+                            )
                         } else {
                             let int32 = ctx.ctx.i32_type();
                             let zero = int32.const_zero();
@@ -1244,30 +1265,12 @@ pub fn get_builtins(primitives: &mut (PrimitiveStore, Unifier)) -> BuiltinInfo {
         })),
     ];
 
-    let ast_list: Vec<Option<ast::Stmt<()>>> =
-        (0..top_level_def_list.len()).map(|_| None).collect();
+    let ast_list: Vec<Option<ast::Stmt<()>>> = vec![None; top_level_def_list.len()];
     (
         izip!(top_level_def_list, ast_list).collect_vec(),
         &[
-            "int32",
-            "int64",
-            "uint32",
-            "uint64",
-            "float",
-            "round",
-            "round64",
-            "range",
-            "str",
-            "bool",
-            "floor",
-            "floor64",
-            "ceil",
-            "ceil64",
-            "len",
-            "min",
-            "max",
-            "abs",
-            "Some",
+            "int32", "int64", "uint32", "uint64", "float", "round", "round64", "range", "str",
+            "bool", "floor", "floor64", "ceil", "ceil64", "len", "min", "max", "abs", "Some",
         ],
     )
 }

nac3core/src/toplevel/composer.rs

@@ -91,8 +91,7 @@ impl TopLevelComposer {
                 assert!(name == *simple_name);
                 builtin_ty.insert(name, *signature);
                 builtin_id.insert(name, DefinitionId(id));
-            } else if let TopLevelDef::Class { name, constructor, object_id, .. } = &*def
-            {
+            } else if let TopLevelDef::Class { name, constructor, object_id, .. } = &*def {
                 assert!(id == object_id.0);
                 if let Some(constructor) = constructor {
                     builtin_ty.insert(*name, *constructor);
@@ -739,8 +738,13 @@ impl TopLevelComposer {
         let mut subst_list = Some(Vec::new());
         // unification of previously assigned typevar
         let mut unification_helper = |ty, def| {
-            let target_ty =
-                get_type_from_type_annotation_kinds(&temp_def_list, unifier, primitives, &def, &mut subst_list)?;
+            let target_ty = get_type_from_type_annotation_kinds(
+                &temp_def_list,
+                unifier,
+                primitives,
+                &def,
+                &mut subst_list,
+            )?;
             unifier.unify(ty, target_ty).map_err(|e| e.to_display(unifier).to_string())?;
             Ok(()) as Result<(), String>
         };
@@ -780,7 +784,9 @@ impl TopLevelComposer {
             match &*def.read() {
                 TopLevelDef::Class { resolver: Some(resolver), .. }
                 | TopLevelDef::Function { resolver: Some(resolver), .. } => {
-                    if let Err(e) = resolver.handle_deferred_eval(unifier, &temp_def_list, primitives) {
+                    if let Err(e) =
+                        resolver.handle_deferred_eval(unifier, &temp_def_list, primitives)
+                    {
                         errors.insert(e);
                     }
                 }
@@ -904,7 +910,7 @@ impl TopLevelComposer {
                                     unifier,
                                     primitives_store,
                                     &type_annotation,
-                                    &mut None
+                                    &mut None,
                                 )?;
 
                                 Ok(FuncArg {
@@ -972,7 +978,7 @@ impl TopLevelComposer {
                                 unifier,
                                 primitives_store,
                                 &return_ty_annotation,
-                                &mut None
+                                &mut None,
                             )?
                         } else {
                             primitives_store.none
@@ -1334,7 +1340,7 @@ impl TopLevelComposer {
                         ));
                     }
                 }
-                ast::StmtKind::Assign { .. } => {}, // we don't class attributes
+                ast::StmtKind::Assign { .. } => {} // we don't class attributes
                 ast::StmtKind::Pass { .. } => {}
                 ast::StmtKind::Expr { value: _, .. } => {} // typically a docstring; ignoring all expressions matches CPython behavior
                 _ => {
@@ -1483,24 +1489,30 @@ impl TopLevelComposer {
         // first, fix function typevar ids
         // they may be changed with our use of placeholders
         for (def, _) in definition_ast_list.iter().skip(self.builtin_num) {
-            if let TopLevelDef::Function {
-                signature,
-                var_id,
-                ..
-            } = &mut *def.write() {
+            if let TopLevelDef::Function { signature, var_id, .. } = &mut *def.write() {
                 if let TypeEnum::TFunc(FunSignature { args, ret, vars }) =
-                        unifier.get_ty(*signature).as_ref() {
-                    let new_var_ids = vars.values().map(|v| match &*unifier.get_ty(*v) {
+                    unifier.get_ty(*signature).as_ref()
+                {
+                    let new_var_ids = vars
+                        .values()
+                        .map(|v| match &*unifier.get_ty(*v) {
                             TypeEnum::TVar { id, .. } => *id,
                             _ => unreachable!(),
-                    }).collect_vec();
+                        })
+                        .collect_vec();
                     if new_var_ids != *var_id {
                         let new_signature = FunSignature {
                             args: args.clone(),
                             ret: *ret,
-                            vars: new_var_ids.iter().zip(vars.values()).map(|(id, v)| (*id, *v)).collect(),
+                            vars: new_var_ids
+                                .iter()
+                                .zip(vars.values())
+                                .map(|(id, v)| (*id, *v))
+                                .collect(),
                         };
-                        unifier.unification_table.set_value(*signature, Rc::new(TypeEnum::TFunc(new_signature)));
+                        unifier
+                            .unification_table
+                            .set_value(*signature, Rc::new(TypeEnum::TFunc(new_signature)));
                         *var_id = new_var_ids;
                     }
                 }
@@ -1527,7 +1539,7 @@ impl TopLevelComposer {
                     unifier,
                     primitives_ty,
                     &make_self_type_annotation(type_vars, *object_id),
-                    &mut None
+                    &mut None,
                 )?;
                 if ancestors
                     .iter()
@@ -1696,13 +1708,14 @@ impl TopLevelComposer {
                                     unifier,
                                     primitives_ty,
                                     &ty_ann,
-                                    &mut None
+                                    &mut None,
                                 )?;
-                                vars.extend(type_vars.iter().map(|ty|
+                                vars.extend(type_vars.iter().map(|ty| {
                                     if let TypeEnum::TVar { id, .. } = &*unifier.get_ty(*ty) {
                                         (*id, *ty)
                                     } else {
                                         unreachable!()
+                                    }
                                 }));
                                 Some((self_ty, type_vars.clone()))
                             } else {
@@ -1918,7 +1931,12 @@ impl TopLevelComposer {
                         }
 
                         instance_to_stmt.insert(
-                            get_subst_key(unifier, self_type, &subst, Some(&vars.keys().cloned().collect())),
+                            get_subst_key(
+                                unifier,
+                                self_type,
+                                &subst,
+                                Some(&vars.keys().cloned().collect()),
+                            ),
                             FunInstance {
                                 body: Arc::new(fun_body),
                                 unifier_id: 0,

nac3core/src/toplevel/helper.rs

@@ -521,65 +521,66 @@ pub fn parse_parameter_default_value(
     }
     match &default.node {
         ast::ExprKind::Constant { value, .. } => handle_constant(value, &default.location),
-        ast::ExprKind::Call { func, args, .. } if args.len() == 1 => {
-            match &func.node {
+        ast::ExprKind::Call { func, args, .. } if args.len() == 1 => match &func.node {
             ast::ExprKind::Name { id, .. } if *id == "int64".into() => match &args[0].node {
                 ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
                     let v: Result<i64, _> = (*v).try_into();
                     match v {
                         Ok(v) => Ok(SymbolValue::I64(v)),
-                            _ => Err(format!("default param value out of range at {}", default.location)),
+                        _ => {
+                            Err(format!("default param value out of range at {}", default.location))
                         }
                     }
-                    _ => Err(format!("only allow constant integer here at {}", default.location))
                 }
+                _ => Err(format!("only allow constant integer here at {}", default.location)),
+            },
             ast::ExprKind::Name { id, .. } if *id == "uint32".into() => match &args[0].node {
                 ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
                     let v: Result<u32, _> = (*v).try_into();
                     match v {
                         Ok(v) => Ok(SymbolValue::U32(v)),
-                            _ => Err(format!("default param value out of range at {}", default.location)),
+                        _ => {
+                            Err(format!("default param value out of range at {}", default.location))
                         }
                     }
-                    _ => Err(format!("only allow constant integer here at {}", default.location))
                 }
+                _ => Err(format!("only allow constant integer here at {}", default.location)),
+            },
             ast::ExprKind::Name { id, .. } if *id == "uint64".into() => match &args[0].node {
                 ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
                     let v: Result<u64, _> = (*v).try_into();
                     match v {
                         Ok(v) => Ok(SymbolValue::U64(v)),
-                            _ => Err(format!("default param value out of range at {}", default.location)),
+                        _ => {
+                            Err(format!("default param value out of range at {}", default.location))
                         }
                     }
-                    _ => Err(format!("only allow constant integer here at {}", default.location))
                 }
-                ast::ExprKind::Name { id, .. } if *id == "Some".into() => Ok(
-                    SymbolValue::OptionSome(
-                        Box::new(parse_parameter_default_value(&args[0], resolver)?)
-                    )
-                ),
+                _ => Err(format!("only allow constant integer here at {}", default.location)),
+            },
+            ast::ExprKind::Name { id, .. } if *id == "Some".into() => Ok(SymbolValue::OptionSome(
+                Box::new(parse_parameter_default_value(&args[0], resolver)?),
+            )),
             _ => Err(format!("unsupported default parameter at {}", default.location)),
-            }
-        }
-        ast::ExprKind::Tuple { elts, .. } => Ok(SymbolValue::Tuple(elts
-            .iter()
+        },
+        ast::ExprKind::Tuple { elts, .. } => Ok(SymbolValue::Tuple(
+            elts.iter()
                 .map(|x| parse_parameter_default_value(x, resolver))
-            .collect::<Result<Vec<_>, _>>()?
+                .collect::<Result<Vec<_>, _>>()?,
         )),
         ast::ExprKind::Name { id, .. } if id == &"none".into() => Ok(SymbolValue::OptionNone),
         ast::ExprKind::Name { id, .. } => {
-            resolver.get_default_param_value(default).ok_or_else(
-                || format!(
+            resolver.get_default_param_value(default).ok_or_else(|| {
+                format!(
                     "`{}` cannot be used as a default parameter at {} \
                     (not primitive type, option or tuple / not defined?)",
-                    id,
-                    default.location
-                )
+                    id, default.location
                 )
+            })
         }
         _ => Err(format!(
             "unsupported default parameter (not primitive type, option or tuple) at {}",
             default.location
-        ))
+        )),
     }
 }

nac3core/src/toplevel/type_annotation.rs

@@ -34,23 +34,23 @@ impl TypeAnnotation {
                     }
                     None => format!("class_def_{}", id.0),
                 };
-                format!(
-                    "{}{}",
-                    class_name,
-                    {
-                        let param_list = params.iter().map(|p| p.stringify(unifier)).collect_vec().join(", ");
+                format!("{}{}", class_name, {
+                    let param_list =
+                        params.iter().map(|p| p.stringify(unifier)).collect_vec().join(", ");
                     if param_list.is_empty() {
                         "".into()
                     } else {
                         format!("[{}]", param_list)
                     }
-                    }
-                )
+                })
             }
             Virtual(ty) => format!("virtual[{}]", ty.stringify(unifier)),
             List(ty) => format!("list[{}]", ty.stringify(unifier)),
             Tuple(types) => {
-                format!("tuple[{}]", types.iter().map(|p| p.stringify(unifier)).collect_vec().join(", "))
+                format!(
+                    "tuple[{}]",
+                    types.iter().map(|p| p.stringify(unifier)).collect_vec().join(", ")
+                )
             }
         }
     }
@@ -302,7 +302,7 @@ pub fn get_type_from_type_annotation_kinds(
     unifier: &mut Unifier,
     primitives: &PrimitiveStore,
     ann: &TypeAnnotation,
-    subst_list: &mut Option<Vec<Type>>
+    subst_list: &mut Option<Vec<Type>>,
 ) -> Result<Type, String> {
     match ann {
         TypeAnnotation::CustomClass { id: obj_id, params } => {
@@ -324,7 +324,7 @@ pub fn get_type_from_type_annotation_kinds(
                                 unifier,
                                 primitives,
                                 x,
-                                subst_list
+                                subst_list,
                             )
                         })
                         .collect::<Result<Vec<_>, _>>()?;
@@ -402,7 +402,7 @@ pub fn get_type_from_type_annotation_kinds(
                 unifier,
                 primitives,
                 ty.as_ref(),
-                subst_list
+                subst_list,
             )?;
             Ok(unifier.add_ty(TypeEnum::TVirtual { ty }))
         }
@@ -412,7 +412,7 @@ pub fn get_type_from_type_annotation_kinds(
                 unifier,
                 primitives,
                 ty.as_ref(),
-                subst_list
+                subst_list,
             )?;
             Ok(unifier.add_ty(TypeEnum::TList { ty }))
         }
@@ -420,7 +420,13 @@ pub fn get_type_from_type_annotation_kinds(
             let tys = tys
                 .iter()
                 .map(|x| {
-                    get_type_from_type_annotation_kinds(top_level_defs, unifier, primitives, x, subst_list)
+                    get_type_from_type_annotation_kinds(
+                        top_level_defs,
+                        unifier,
+                        primitives,
+                        x,
+                        subst_list,
+                    )
                 })
                 .collect::<Result<Vec<_>, _>>()?;
             Ok(unifier.add_ty(TypeEnum::TTuple { ty: tys }))

nac3core/src/typecheck/function_check.rs

@@ -20,8 +20,9 @@ impl<'a> Inferencer<'a> {
         defined_identifiers: &mut HashSet<StrRef>,
     ) -> Result<(), String> {
         match &pattern.node {
-            ast::ExprKind::Name { id, .. } if id == &"none".into() =>
-                Err(format!("cannot assign to a `none` (at {})", pattern.location)),
+            ast::ExprKind::Name { id, .. } if id == &"none".into() => {
+                Err(format!("cannot assign to a `none` (at {})", pattern.location))
+            }
             ExprKind::Name { id, .. } => {
                 if !defined_identifiers.contains(id) {
                     defined_identifiers.insert(*id);

nac3core/src/typecheck/type_inferencer/mod.rs

@@ -430,7 +430,7 @@ impl<'a> fold::Fold<()> for Inferencer<'a> {
                 self.unify(test.custom.unwrap(), self.primitives.bool, &test.location)?;
                 match msg {
                     Some(m) => self.unify(m.custom.unwrap(), self.primitives.str, &m.location)?,
-                    None => ()
+                    None => (),
                 }
             }
             _ => return report_error("Unsupported statement type", stmt.location),
@@ -464,9 +464,14 @@ impl<'a> fold::Fold<()> for Inferencer<'a> {
                         let var_map = params
                             .iter()
                             .map(|(id_var, ty)| {
-                                if let TypeEnum::TVar { id, range, name, loc, .. } = &*self.unifier.get_ty(*ty) {
+                                if let TypeEnum::TVar { id, range, name, loc, .. } =
+                                    &*self.unifier.get_ty(*ty)
+                                {
                                     assert_eq!(*id, *id_var);
-                                    (*id, self.unifier.get_fresh_var_with_range(range, *name, *loc).0)
+                                    (
+                                        *id,
+                                        self.unifier.get_fresh_var_with_range(range, *name, *loc).0,
+                                    )
                                 } else {
                                     unreachable!()
                                 }
@@ -822,7 +827,7 @@ impl<'a> Inferencer<'a> {
                                 },
                             });
                         } else {
-                            return report_error("Integer out of bound", args[0].location)
+                            return report_error("Integer out of bound", args[0].location);
                         }
                     }
                 }
@@ -842,7 +847,7 @@ impl<'a> Inferencer<'a> {
                                 },
                             });
                         } else {
-                            return report_error("Integer out of bound", args[0].location)
+                            return report_error("Integer out of bound", args[0].location);
                         }
                     }
                 }
@@ -862,10 +867,62 @@ impl<'a> Inferencer<'a> {
                                 },
                             });
                         } else {
-                            return report_error("Integer out of bound", args[0].location)
+                            return report_error("Integer out of bound", args[0].location);
                         }
                     }
                 }
+                // array() is a "magic" function call that determines the number of
+                // dimensions in the result from the nesting of the array argument type,
+                // to match the host Python NumPy API.
+                if id == "array".into() {
+                    if args.is_empty() {
+                        return report_error(
+                            "`array()` expects at least one argument (contents in list form)",
+                            func_location,
+                        );
+                    }
+
+                    if args.len() > 2 || !keywords.is_empty() {
+                        return report_error(
+                            "Additional `array()` arguments not yet implemented",
+                            func_location,
+                        );
+                        // TODO: Implement `dtype=` kwarg.
+                    }
+
+                    let list_arg = self.fold_expr(args.remove(0))?;
+                    // TODO: Implement special case for emtpy arrays (e.g. `array([[]]))`)
+                    // to match NumPy.
+
+                    let mut num_dims = 0;
+                    let mut elem_type = list_arg.custom.unwrap();
+                    while let TypeEnum::TList { ty } = &*self.unifier.get_ty(elem_type) {
+                        elem_type = *ty;
+                        num_dims += 1;
+                    }
+                    if num_dims == 0 {
+                        return report_error(
+                            "expected list argument to array(), not xxx",
+                            func_location,
+                        );
+                    }
+
+                    let custom =
+                        Some(self.unifier.add_ty(TypeEnum::TNDArray { ty: elem_type, num_dims }));
+                    return Ok(Located {
+                        location,
+                        custom,
+                        node: ExprKind::Call {
+                            func: Box::new(Located {
+                                custom: None,
+                                location: func.location,
+                                node: ExprKind::Name { id, ctx },
+                            }),
+                            args: vec![list_arg],
+                            keywords: vec![],
+                        },
+                    });
+                }
                 Located { location: func_location, custom, node: ExprKind::Name { id, ctx } }
             } else {
                 func
@@ -962,8 +1019,9 @@ impl<'a> Inferencer<'a> {
                 Ok(self.unifier.add_ty(TypeEnum::TTuple { ty: ty? }))
             }
             ast::Constant::Str(_) => Ok(self.primitives.str),
-            ast::Constant::None
-                => report_error("CPython `None` not supported (nac3 uses `none` instead)", *loc),
+            ast::Constant::None => {
+                report_error("CPython `None` not supported (nac3 uses `none` instead)", *loc)
+            }
             _ => report_error("not supported", *loc),
         }
     }
@@ -998,8 +1056,11 @@ impl<'a> Inferencer<'a> {
                 }
                 (None, _) => {
                     let t = self.unifier.stringify(ty);
-                    report_error(&format!("`{}::{}` field/method does not exist", t, attr), value.location)
-                },
+                    report_error(
+                        &format!("`{}::{}` field/method does not exist", t, attr),
+                        value.location,
+                    )
+                }
             }
         } else {
             let attr_ty = self.unifier.get_dummy_var().0;
@@ -1033,10 +1094,8 @@ impl<'a> Inferencer<'a> {
         let method = if let TypeEnum::TObj { fields, .. } =
             self.unifier.get_ty_immutable(left.custom.unwrap()).as_ref()
         {
-            let (binop_name, binop_assign_name) = (
-                binop_name(op).into(),
-                binop_assign_name(op).into()
-            );
+            let (binop_name, binop_assign_name) =
+                (binop_name(op).into(), binop_assign_name(op).into());
             // if is aug_assign, try aug_assign operator first
             if is_aug_assign && fields.contains_key(&binop_assign_name) {
                 binop_assign_name
@@ -1097,6 +1156,7 @@ impl<'a> Inferencer<'a> {
                 for v in [lower.as_ref(), upper.as_ref(), step.as_ref()].iter().flatten() {
                     self.constrain(v.custom.unwrap(), self.primitives.int32, &v.location)?;
                 }
+                // xxx: Support TNDArray.
                 let list = self.unifier.add_ty(TypeEnum::TList { ty });
                 self.constrain(value.custom.unwrap(), list, &value.location)?;
                 Ok(list)
@@ -1115,18 +1175,79 @@ impl<'a> Inferencer<'a> {
                 Ok(ty)
             }
             _ => {
-                if let TypeEnum::TTuple { .. } = &*self.unifier.get_ty(value.custom.unwrap())
-                {
-                    return report_error("Tuple index must be a constant (KernelInvariant is also not supported)", slice.location)
+                match &*self.unifier.get_ty(value.custom.unwrap()) {
+                    TypeEnum::TTuple { .. } => return report_error(
+                        "Tuple index must be a constant (KernelInvariant is also not supported)",
+                        slice.location,
+                    ),
+                    TypeEnum::TNDArray { ty: elem_ty, num_dims } => {
+                        let num_idxs = match &*self.unifier.get_ty(slice.custom.unwrap()) {
+                            TypeEnum::TTuple { ty: idx_tys } => {
+                                for idx_ty in idx_tys.iter() {
+                                    // xxx: NumPy supports a tuple of tuples for "advanced indexing"
+                                    // of multidimensional arrays (sequence index -> subset). We
+                                    // don't support this, but could give a better error message.
+                                    self.constrain(
+                                        *idx_ty,
+                                        self.primitives.int32,
+                                        &slice.location,
+                                    )?;
                                 }
+                                idx_tys.len()
+                            }
+                            TypeEnum::TList { .. } | TypeEnum::TNDArray { .. } => {
+                                return report_error(
+                                    concat!(
+                                        "ndarray index is list/array, but NumPy advanced (subset)",
+                                        "indexing is not supported yet"
+                                    ),
+                                    slice.location,
+                                );
+                            }
+                            _ => {
+                                // xxx: Could lead to suboptimal error message, as higher-dimensional indexing is not mentioned?!
+                                self.constrain(
+                                    slice.custom.unwrap(),
+                                    self.primitives.int32,
+                                    &slice.location,
+                                )?;
+                                1
+                            }
+                        };
+
+                        if *num_dims < num_idxs {
+                            report_error(
+                                &format!(
+                                    "ndarray has dimension {}, but {} indices supplied",
+                                    num_dims, num_idxs
+                                ),
+                                slice.location,
+                            )
+                        } else if *num_dims == num_idxs {
+                            Ok(*elem_ty)
+                        } else {
+                            Ok(self.unifier.add_ty(TypeEnum::TNDArray {
+                                ty: *elem_ty,
+                                num_dims: *num_dims - num_idxs,
+                            }))
+                        }
+                    }
+                    _ => {
                         // the index is not a constant, so value can only be a list
-                self.constrain(slice.custom.unwrap(), self.primitives.int32, &slice.location)?;
+                        // xxx: Or an ndarray now, so remove the constraint?
+                        self.constrain(
+                            slice.custom.unwrap(),
+                            self.primitives.int32,
+                            &slice.location,
+                        )?;
                         let list = self.unifier.add_ty(TypeEnum::TList { ty });
                         self.constrain(value.custom.unwrap(), list, &value.location)?;
                         Ok(ty)
                     }
                 }
             }
+        }
+    }
 
     fn infer_if_expr(
         &mut self,

nac3core/src/typecheck/type_inferencer/test.rs

@@ -513,6 +513,20 @@ impl TestEnvironment {
     [("a", "list[int32]"), ("b", "list[int32]")].iter().cloned().collect(),
     &[]
     ; "listcomp test")]
+#[test_case(
+    indoc! {"
+        a = array([1, 2])
+        a0 = a[0]
+        b = array([[1, 2], [3, 4]])
+        b0 = b[0]
+        b00 = b[0, 0]
+        c = 1
+        ac = a[c]
+    "},
+    [("a", "ndarray[int32, 1]"), ("a0", "int32"), ("b", "ndarray[int32, 2]"),
+     ("b0", "ndarray[int32, 1]"), ("b00", "int32"), ("ac", "int32")].iter().cloned().collect(),
+    &[]
+    ; "array test")]
 #[test_case(indoc! {"
         a = virtual(Bar(), Bar)
         b = a.b()
@@ -533,6 +547,7 @@ fn test_basic(source: &str, mapping: HashMap<&str, &str>, virtuals: &[(&str, &st
     let mut env = TestEnvironment::new();
     let id_to_name = std::mem::take(&mut env.id_to_name);
     let mut defined_identifiers: HashSet<_> = env.identifier_mapping.keys().cloned().collect();
+    defined_identifiers.insert("array".into());
     defined_identifiers.insert("virtual".into());
     let mut inferencer = env.get_inferencer();
     inferencer.defined_identifiers = defined_identifiers.clone();

nac3core/src/typecheck/typedef/mod.rs

@@ -137,6 +137,13 @@ pub enum TypeEnum {
     TList {
         ty: Type,
     },
+    TNDArray {
+        ty: Type,
+
+        // We could introduce a more sensible limit for the number of dimensions
+        // and make this e.g. u8; usize for now to avoid some casts.
+        num_dims: usize,
+    },
     TObj {
         obj_id: DefinitionId,
         fields: Mapping<StrRef, (Type, bool)>,
@@ -156,6 +163,7 @@ impl TypeEnum {
             TypeEnum::TVar { .. } => "TVar",
             TypeEnum::TTuple { .. } => "TTuple",
             TypeEnum::TList { .. } => "TList",
+            TypeEnum::TNDArray { .. } => "TNDArray",
             TypeEnum::TObj { .. } => "TObj",
             TypeEnum::TVirtual { .. } => "TVirtual",
             TypeEnum::TCall { .. } => "TCall",
@@ -173,7 +181,7 @@ pub struct Unifier {
     pub(crate) calls: Vec<Rc<Call>>,
     var_id: u32,
     unify_cache: HashSet<(Type, Type)>,
-    snapshot: Option<(usize, u32)>
+    snapshot: Option<(usize, u32)>,
 }
 
 impl Default for Unifier {
@@ -387,6 +395,7 @@ impl Unifier {
             TVar { .. } => allowed_typevars.iter().any(|b| self.unification_table.unioned(a, *b)),
             TCall { .. } => false,
             TList { ty } => self.is_concrete(*ty, allowed_typevars),
+            TNDArray { ty, .. } => self.is_concrete(*ty, allowed_typevars),
             TTuple { ty } => ty.iter().all(|ty| self.is_concrete(*ty, allowed_typevars)),
             TObj { params: vars, .. } => {
                 vars.values().all(|ty| self.is_concrete(*ty, allowed_typevars))
@@ -459,10 +468,7 @@ impl Unifier {
             if let Some(i) = required.iter().position(|v| v == k) {
                 required.remove(i);
             }
-            let i = all_names
-                .iter()
-                .position(|v| &v.0 == k)
-                .ok_or_else(|| {
+            let i = all_names.iter().position(|v| &v.0 == k).ok_or_else(|| {
                 self.restore_snapshot();
                 TypeError::new(TypeErrorKind::UnknownArgName(*k), *loc)
             })?;
@@ -652,6 +658,28 @@ impl Unifier {
                 self.unify_impl(x, b, false)?;
                 self.set_a_to_b(a, x);
             }
+            (TVar { fields: Some(fields), range, .. }, TNDArray { ty, num_dims }) => {
+                for (k, v) in fields.iter() {
+                    match *k {
+                        RecordKey::Int(_) => {
+                            // .<n> is generated during generic scalar indexing lowering.
+                            let indexed_ty = if *num_dims == 1 {
+                                *ty
+                            } else {
+                                self.add_ty(TNDArray { ty: *ty, num_dims: *num_dims - 1 })
+                            };
+                            self.unify_impl(v.ty, indexed_ty, false).map_err(|e| e.at(v.loc))?
+                        }
+                        RecordKey::Str(_) => {
+                            // xxx: Implement .shape here?
+                            return Err(TypeError::new(TypeErrorKind::NoSuchField(*k, b), v.loc));
+                        }
+                    }
+                }
+                let x = self.check_var_compatibility(b, range)?.unwrap_or(b);
+                self.unify_impl(x, b, false)?;
+                self.set_a_to_b(a, x);
+            }
             (TTuple { ty: ty1 }, TTuple { ty: ty2 }) => {
                 if ty1.len() != ty2.len() {
                     return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
@@ -907,6 +935,13 @@ impl Unifier {
             TypeEnum::TList { ty } => {
                 format!("list[{}]", self.internal_stringify(*ty, obj_to_name, var_to_name, notes))
             }
+            TypeEnum::TNDArray { ty, num_dims } => {
+                format!(
+                    "ndarray[{}, {}]",
+                    self.internal_stringify(*ty, obj_to_name, var_to_name, notes),
+                    num_dims
+                )
+            }
             TypeEnum::TVirtual { ty } => {
                 format!(
                     "virtual[{}]",

nac3core/src/typecheck/typedef/test.rs

@@ -479,7 +479,8 @@ fn test_typevar_range() {
     assert_eq!(
         env.unify(a_list, int_list),
         Err("Incompatible types: list[typevar22] and list[0]\
-            \n\nNotes:\n    typevar22 ∈ {1}".into())
+            \n\nNotes:\n    typevar22 ∈ {1}"
+            .into())
     );
 
     let a = env.unifier.get_fresh_var_with_range(&[int, float], None, None).0;
@@ -507,7 +508,10 @@ fn test_rigid_var() {
 
     assert_eq!(env.unify(a, b), Err("Incompatible types: typevar3 and typevar2".to_string()));
     env.unifier.unify(list_a, list_x).unwrap();
-    assert_eq!(env.unify(list_x, list_int), Err("Incompatible types: list[typevar2] and list[0]".to_string()));
+    assert_eq!(
+        env.unify(list_x, list_int),
+        Err("Incompatible types: list[typevar2] and list[0]".to_string())
+    );
 
     env.unifier.replace_rigid_var(a, int);
     env.unifier.unify(list_x, list_int).unwrap();

nac3core/src/typecheck/unification_table.rs

@@ -16,21 +16,10 @@ pub struct UnificationTable<V> {
 
 #[derive(Clone, Debug)]
 enum Action<V> {
-    Parent {
-        key: usize,
-        original_parent: usize,
-    },
-    Value {
-        key: usize,
-        original_value: Option<V>,
-    },
-    Rank {
-        key: usize,
-        original_rank: u32,
-    },
-    Marker {
-        generation: u32,
-    }
+    Parent { key: usize, original_parent: usize },
+    Value { key: usize, original_value: Option<V> },
+    Rank { key: usize, original_rank: u32 },
+    Marker { generation: u32 },
 }
 
 impl<V> Default for UnificationTable<V> {
@@ -41,7 +30,13 @@ impl<V> Default for UnificationTable<V> {
 
 impl<V> UnificationTable<V> {
     pub fn new() -> UnificationTable<V> {
-        UnificationTable { parents: Vec::new(), ranks: Vec::new(), values: Vec::new(), log: Vec::new(), generation: 0 }
+        UnificationTable {
+            parents: Vec::new(),
+            ranks: Vec::new(),
+            values: Vec::new(),
+            log: Vec::new(),
+            generation: 0,
+        }
     }
 
     pub fn new_key(&mut self, v: V) -> UnificationKey {
@@ -125,7 +120,10 @@ impl<V> UnificationTable<V> {
     pub fn restore_snapshot(&mut self, snapshot: (usize, u32)) {
         let (log_len, generation) = snapshot;
         assert!(self.log.len() >= log_len, "snapshot restoration error");
-        assert!(matches!(self.log[log_len - 1], Action::Marker { generation: gen } if gen == generation), "snapshot restoration error");
+        assert!(
+            matches!(self.log[log_len - 1], Action::Marker { generation: gen } if gen == generation),
+            "snapshot restoration error"
+        );
         for action in self.log.drain(log_len - 1..).rev() {
             match action {
                 Action::Parent { key, original_parent } => {
@@ -145,7 +143,10 @@ impl<V> UnificationTable<V> {
     pub fn discard_snapshot(&mut self, snapshot: (usize, u32)) {
         let (log_len, generation) = snapshot;
         assert!(self.log.len() >= log_len, "snapshot discard error");
-        assert!(matches!(self.log[log_len - 1], Action::Marker { generation: gen } if gen == generation), "snapshot discard error");
+        assert!(
+            matches!(self.log[log_len - 1], Action::Marker { generation: gen } if gen == generation),
+            "snapshot discard error"
+        );
         self.log.clear();
     }
 }
@@ -159,11 +160,23 @@ where
             .enumerate()
             .map(|(i, (v, p))| if *p == i { v.as_ref().map(|v| v.as_ref().clone()) } else { None })
             .collect();
-        UnificationTable { parents: self.parents.clone(), ranks: self.ranks.clone(), values, log: Vec::new(), generation: 0 }
+        UnificationTable {
+            parents: self.parents.clone(),
+            ranks: self.ranks.clone(),
+            values,
+            log: Vec::new(),
+            generation: 0,
+        }
     }
 
     pub fn from_send(table: &UnificationTable<V>) -> UnificationTable<Rc<V>> {
         let values = table.values.iter().cloned().map(|v| v.map(Rc::new)).collect();
-        UnificationTable { parents: table.parents.clone(), ranks: table.ranks.clone(), values, log: Vec::new(), generation: 0 }
+        UnificationTable {
+            parents: table.parents.clone(),
+            ranks: table.ranks.clone(),
+            values,
+            log: Vec::new(),
+            generation: 0,
+        }
     }
 }

nac3parser/src/config_comment_helper.rs

@@ -1,15 +1,15 @@
-use lalrpop_util::ParseError;
-use nac3ast::*;
 use crate::ast::Ident;
 use crate::ast::Location;
-use crate::token::Tok;
 use crate::error::*;
+use crate::token::Tok;
+use lalrpop_util::ParseError;
+use nac3ast::*;
 
 pub fn make_config_comment(
     com_loc: Location,
     stmt_loc: Location,
     nac3com_above: Vec<(Ident, Tok)>,
-    nac3com_end: Option<Ident>
+    nac3com_end: Option<Ident>,
 ) -> Result<Vec<Ident>, ParseError<Location, Tok, LexicalError>> {
     if com_loc.column() != stmt_loc.column() && !nac3com_above.is_empty() {
         return Err(ParseError::User {
@@ -23,18 +23,21 @@ pub fn make_config_comment(
                     )
                 )
             }
-        })
+        });
     };
-    Ok(
-        nac3com_above
+    Ok(nac3com_above
         .into_iter()
         .map(|(com, _)| com)
         .chain(nac3com_end.map_or_else(|| vec![].into_iter(), |com| vec![com].into_iter()))
-            .collect()
-    )
+        .collect())
 }
 
-pub fn handle_small_stmt<U>(stmts: &mut [Stmt<U>], nac3com_above: Vec<(Ident, Tok)>, nac3com_end: Option<Ident>, com_above_loc: Location) -> Result<(), ParseError<Location, Tok, LexicalError>> {
+pub fn handle_small_stmt<U>(
+    stmts: &mut [Stmt<U>],
+    nac3com_above: Vec<(Ident, Tok)>,
+    nac3com_end: Option<Ident>,
+    com_above_loc: Location,
+) -> Result<(), ParseError<Location, Tok, LexicalError>> {
     if com_above_loc.column() != stmts[0].location.column() && !nac3com_above.is_empty() {
         return Err(ParseError::User {
             error: LexicalError {
@@ -47,17 +50,12 @@ pub fn handle_small_stmt<U>(stmts: &mut [Stmt<U>], nac3com_above: Vec<(Ident, To
                     )
                 )
             }
-        })
+        });
     }
-    apply_config_comments(
-        &mut stmts[0],
-        nac3com_above
-            .into_iter()
-            .map(|(com, _)| com).collect()
-    );
+    apply_config_comments(&mut stmts[0], nac3com_above.into_iter().map(|(com, _)| com).collect());
     apply_config_comments(
         stmts.last_mut().unwrap(),
-        nac3com_end.map_or_else(Vec::new, |com| vec![com])
+        nac3com_end.map_or_else(Vec::new, |com| vec![com]),
     );
     Ok(())
 }
@@ -80,6 +78,8 @@ fn apply_config_comments<U>(stmt: &mut Stmt<U>, comments: Vec<Ident>) {
         | StmtKind::Nonlocal { config_comment, .. }
         | StmtKind::Assert { config_comment, .. } => config_comment.extend(comments),
 
-        _ => { unreachable!("only small statements should call this function") }
+        _ => {
+            unreachable!("only small statements should call this function")
+        }
     }
 }

nac3parser/src/error.rs

@@ -145,35 +145,27 @@ impl From<LalrpopError<Location, Tok, LexicalError>> for ParseError {
     fn from(err: LalrpopError<Location, Tok, LexicalError>) -> Self {
         match err {
             // TODO: Are there cases where this isn't an EOF?
-            LalrpopError::InvalidToken { location } => ParseError {
-                error: ParseErrorType::Eof,
-                location,
-            },
-            LalrpopError::ExtraToken { token } => ParseError {
-                error: ParseErrorType::ExtraToken(token.1),
-                location: token.0,
-            },
-            LalrpopError::User { error } => ParseError {
-                error: ParseErrorType::Lexical(error.error),
-                location: error.location,
-            },
+            LalrpopError::InvalidToken { location } => {
+                ParseError { error: ParseErrorType::Eof, location }
+            }
+            LalrpopError::ExtraToken { token } => {
+                ParseError { error: ParseErrorType::ExtraToken(token.1), location: token.0 }
+            }
+            LalrpopError::User { error } => {
+                ParseError { error: ParseErrorType::Lexical(error.error), location: error.location }
+            }
             LalrpopError::UnrecognizedToken { token, expected } => {
                 // Hacky, but it's how CPython does it. See PyParser_AddToken,
                 // in particular "Only one possible expected token" comment.
-                let expected = if expected.len() == 1 {
-                    Some(expected[0].clone())
-                } else {
-                    None
-                };
+                let expected = if expected.len() == 1 { Some(expected[0].clone()) } else { None };
                 ParseError {
                     error: ParseErrorType::UnrecognizedToken(token.1, expected),
                     location: token.0,
                 }
             }
-            LalrpopError::UnrecognizedEOF { location, .. } => ParseError {
-                error: ParseErrorType::Eof,
-                location,
-            },
+            LalrpopError::UnrecognizedEOF { location, .. } => {
+                ParseError { error: ParseErrorType::Eof, location }
+            }
         }
     }
 }

nac3parser/src/fstring.rs

@@ -15,10 +15,7 @@ struct FStringParser<'a> {
 
 impl<'a> FStringParser<'a> {
     fn new(source: &'a str, str_location: Location) -> Self {
-        Self {
-            chars: source.chars().peekable(),
-            str_location,
-        }
+        Self { chars: source.chars().peekable(), str_location }
     }
 
     #[inline]
@@ -251,17 +248,11 @@ impl<'a> FStringParser<'a> {
         }
 
         if !content.is_empty() {
-            values.push(self.expr(ExprKind::Constant {
-                value: content.into(),
-                kind: None,
-            }))
+            values.push(self.expr(ExprKind::Constant { value: content.into(), kind: None }))
         }
 
         let s = match values.len() {
-            0 => self.expr(ExprKind::Constant {
-                value: String::new().into(),
-                kind: None,
-            }),
+            0 => self.expr(ExprKind::Constant { value: String::new().into(), kind: None }),
             1 => values.into_iter().next().unwrap(),
             _ => self.expr(ExprKind::JoinedStr { values }),
         };
@@ -277,9 +268,7 @@ fn parse_fstring_expr(source: &str) -> Result<Expr, ParseError> {
 /// Parse an fstring from a string, located at a certain position in the sourcecode.
 /// In case of errors, we will get the location and the error returned.
 pub fn parse_located_fstring(source: &str, location: Location) -> Result<Expr, FStringError> {
-    FStringParser::new(source, location)
-        .parse()
-        .map_err(|error| FStringError { error, location })
+    FStringParser::new(source, location).parse().map_err(|error| FStringError { error, location })
 }
 
 #[cfg(test)]

nac3parser/src/function.rs

@@ -69,10 +69,7 @@ pub fn parse_args(func_args: Vec<FunctionArgument>) -> Result<ArgumentList, Lexi
 
                 keywords.push(ast::Keyword::new(
                     location,
-                    ast::KeywordData {
-                        arg: name.map(|name| name.into()),
-                        value: Box::new(value),
-                    },
+                    ast::KeywordData { arg: name.map(|name| name.into()), value: Box::new(value) },
                 ));
             }
             None => {

nac3parser/src/lexer.rs

@@ -3,12 +3,12 @@
 //! This means source code is translated into separate tokens.
 
 pub use super::token::Tok;
-use crate::ast::{Location, FileName};
+use crate::ast::{FileName, Location};
 use crate::error::{LexicalError, LexicalErrorType};
 use std::char;
 use std::cmp::Ordering;
-use std::str::FromStr;
 use std::num::IntErrorKind;
+use std::str::FromStr;
 use unic_emoji_char::is_emoji_presentation;
 use unic_ucd_ident::{is_xid_continue, is_xid_start};
 
@@ -32,20 +32,14 @@ impl IndentationLevel {
                 if self.spaces <= other.spaces {
                     Ok(Ordering::Less)
                 } else {
-                    Err(LexicalError {
-                        location,
-                        error: LexicalErrorType::TabError,
-                    })
+                    Err(LexicalError { location, error: LexicalErrorType::TabError })
                 }
             }
             Ordering::Greater => {
                 if self.spaces >= other.spaces {
                     Ok(Ordering::Greater)
                 } else {
-                    Err(LexicalError {
-                        location,
-                        error: LexicalErrorType::TabError,
-                    })
+                    Err(LexicalError { location, error: LexicalErrorType::TabError })
                 }
             }
             Ordering::Equal => Ok(self.spaces.cmp(&other.spaces)),
@@ -63,7 +57,7 @@ pub struct Lexer<T: Iterator<Item = char>> {
     chr1: Option<char>,
     chr2: Option<char>,
     location: Location,
-    config_comment_prefix: Option<&'static str>
+    config_comment_prefix: Option<&'static str>,
 }
 
 pub static KEYWORDS: phf::Map<&'static str, Tok> = phf::phf_map! {
@@ -136,11 +130,7 @@ where
     T: Iterator<Item = char>,
 {
     pub fn new(source: T) -> Self {
-        let mut nlh = NewlineHandler {
-            source,
-            chr0: None,
-            chr1: None,
-        };
+        let mut nlh = NewlineHandler { source, chr0: None, chr1: None };
         nlh.shift();
         nlh.shift();
         nlh
@@ -195,7 +185,7 @@ where
             location: start,
             chr1: None,
             chr2: None,
-            config_comment_prefix: Some(" nac3:")
+            config_comment_prefix: Some(" nac3:"),
         };
         lxr.next_char();
         lxr.next_char();
@@ -287,15 +277,15 @@ where
         let end_pos = self.get_pos();
         let value = match i128::from_str_radix(&value_text, radix) {
             Ok(value) => value,
-            Err(e) => {
-                match e.kind() {
+            Err(e) => match e.kind() {
                 IntErrorKind::PosOverflow | IntErrorKind::NegOverflow => i128::MAX,
-                    _ => return Err(LexicalError {
+                _ => {
+                    return Err(LexicalError {
                         error: LexicalErrorType::OtherError(format!("{:?}", e)),
                         location: start_pos,
-                    }),
-                }
+                    })
                 }
+            },
         };
         Ok((start_pos, Tok::Int { value }, end_pos))
     }
@@ -338,14 +328,7 @@ where
             if self.chr0 == Some('j') || self.chr0 == Some('J') {
                 self.next_char();
                 let end_pos = self.get_pos();
-                Ok((
-                    start_pos,
-                    Tok::Complex {
-                        real: 0.0,
-                        imag: value,
-                    },
-                    end_pos,
-                ))
+                Ok((start_pos, Tok::Complex { real: 0.0, imag: value }, end_pos))
             } else {
                 let end_pos = self.get_pos();
                 Ok((start_pos, Tok::Float { value }, end_pos))
@@ -364,7 +347,7 @@ where
                 let value = value_text.parse::<i128>().ok();
                 let nonzero = match value {
                     Some(value) => value != 0i128,
-                    None => true
+                    None => true,
                 };
                 if start_is_zero && nonzero {
                     return Err(LexicalError {
@@ -433,9 +416,8 @@ where
     fn lex_comment(&mut self) -> Option<Spanned> {
         self.next_char();
         // if possibly nac3 pseudocomment, special handling for `# nac3:`
-        let (mut prefix, mut is_comment) = self
-            .config_comment_prefix
-            .map_or_else(|| ("".chars(), false), |v| (v.chars(), true));
+        let (mut prefix, mut is_comment) =
+            self.config_comment_prefix.map_or_else(|| ("".chars(), false), |v| (v.chars(), true));
         // for the correct location of config comment
         let mut start_loc = self.location;
         start_loc.go_left();
@@ -460,22 +442,20 @@ where
                             return Some((
                                 start_loc,
                                 Tok::ConfigComment { content: content.trim().into() },
-                                self.location
+                                self.location,
                             ));
                         }
                     }
                 }
             }
             self.next_char();
-        };
+        }
     }
 
     fn unicode_literal(&mut self, literal_number: usize) -> Result<char, LexicalError> {
         let mut p: u32 = 0u32;
-        let unicode_error = LexicalError {
-            error: LexicalErrorType::UnicodeError,
-            location: self.get_pos(),
-        };
+        let unicode_error =
+            LexicalError { error: LexicalErrorType::UnicodeError, location: self.get_pos() };
         for i in 1..=literal_number {
             match self.next_char() {
                 Some(c) => match c.to_digit(16) {
@@ -530,10 +510,8 @@ where
                 }
             }
         }
-        unicode_names2::character(&name).ok_or(LexicalError {
-            error: LexicalErrorType::UnicodeError,
-            location: start_pos,
-        })
+        unicode_names2::character(&name)
+            .ok_or(LexicalError { error: LexicalErrorType::UnicodeError, location: start_pos })
     }
 
     fn lex_string(
@@ -650,14 +628,9 @@ where
         let end_pos = self.get_pos();
 
         let tok = if is_bytes {
-            Tok::Bytes {
-                value: string_content.chars().map(|c| c as u8).collect(),
-            }
+            Tok::Bytes { value: string_content.chars().map(|c| c as u8).collect() }
         } else {
-            Tok::String {
-                value: string_content,
-                is_fstring,
-            }
+            Tok::String { value: string_content, is_fstring }
         };
 
         Ok((start_pos, tok, end_pos))
@@ -842,11 +815,7 @@ where
                 let tok_start = self.get_pos();
                 self.next_char();
                 let tok_end = self.get_pos();
-                self.emit((
-                    tok_start,
-                    Tok::Name { name: c.to_string().into() },
-                    tok_end,
-                ));
+                self.emit((tok_start, Tok::Name { name: c.to_string().into() }, tok_end));
             } else {
                 self.consume_character(c)?;
             }
@@ -1439,14 +1408,8 @@ class Foo(A, B):
         assert_eq!(
             tokens,
             vec![
-                Tok::String {
-                    value: "\\\\".to_owned(),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: "\\".to_owned(),
-                    is_fstring: false,
-                },
+                Tok::String { value: "\\\\".to_owned(), is_fstring: false },
+                Tok::String { value: "\\".to_owned(), is_fstring: false },
                 Tok::Newline,
             ]
         );
@@ -1459,27 +1422,13 @@ class Foo(A, B):
         assert_eq!(
             tokens,
             vec![
-                Tok::Int {
-                    value: 47i128,
-                },
-                Tok::Int {
-                    value: 13i128,
-                },
-                Tok::Int {
-                    value: 0i128,
-                },
-                Tok::Int {
-                    value: 123i128,
-                },
+                Tok::Int { value: 47i128 },
+                Tok::Int { value: 13i128 },
+                Tok::Int { value: 0i128 },
+                Tok::Int { value: 123i128 },
                 Tok::Float { value: 0.2 },
-                Tok::Complex {
-                    real: 0.0,
-                    imag: 2.0,
-                },
-                Tok::Complex {
-                    real: 0.0,
-                    imag: 2.2,
-                },
+                Tok::Complex { real: 0.0, imag: 2.0 },
+                Tok::Complex { real: 0.0, imag: 2.2 },
                 Tok::Newline,
             ]
         );
@@ -1539,21 +1488,13 @@ class Foo(A, B):
         assert_eq!(
             tokens,
             vec![
-                Tok::Name {
-                    name: String::from("avariable").into(),
-                },
+                Tok::Name { name: String::from("avariable").into() },
                 Tok::Equal,
-                Tok::Int {
-                    value: 99i128
-                },
+                Tok::Int { value: 99i128 },
                 Tok::Plus,
-                Tok::Int {
-                    value: 2i128
-                },
+                Tok::Int { value: 2i128 },
                 Tok::Minus,
-                Tok::Int {
-                    value: 0i128
-                },
+                Tok::Int { value: 0i128 },
                 Tok::Newline,
             ]
         );
@@ -1740,42 +1681,15 @@ class Foo(A, B):
         assert_eq!(
             tokens,
             vec![
-                Tok::String {
-                    value: String::from("double"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("single"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("can't"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("\\\""),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("\t\r\n"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("\\g"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("raw\\'"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("Đ"),
-                    is_fstring: false,
-                },
-                Tok::String {
-                    value: String::from("\u{80}\u{0}a"),
-                    is_fstring: false,
-                },
+                Tok::String { value: String::from("double"), is_fstring: false },
+                Tok::String { value: String::from("single"), is_fstring: false },
+                Tok::String { value: String::from("can't"), is_fstring: false },
+                Tok::String { value: String::from("\\\""), is_fstring: false },
+                Tok::String { value: String::from("\t\r\n"), is_fstring: false },
+                Tok::String { value: String::from("\\g"), is_fstring: false },
+                Tok::String { value: String::from("raw\\'"), is_fstring: false },
+                Tok::String { value: String::from("Đ"), is_fstring: false },
+                Tok::String { value: String::from("\u{80}\u{0}a"), is_fstring: false },
                 Tok::Newline,
             ]
         );
@@ -1840,41 +1754,17 @@ class Foo(A, B):
     fn test_raw_byte_literal() {
         let source = r"rb'\x1z'";
         let tokens = lex_source(source);
-        assert_eq!(
-            tokens,
-            vec![
-                Tok::Bytes {
-                    value: b"\\x1z".to_vec()
-                },
-                Tok::Newline
-            ]
-        );
+        assert_eq!(tokens, vec![Tok::Bytes { value: b"\\x1z".to_vec() }, Tok::Newline]);
         let source = r"rb'\\'";
         let tokens = lex_source(source);
-        assert_eq!(
-            tokens,
-            vec![
-                Tok::Bytes {
-                    value: b"\\\\".to_vec()
-                },
-                Tok::Newline
-            ]
-        )
+        assert_eq!(tokens, vec![Tok::Bytes { value: b"\\\\".to_vec() }, Tok::Newline])
     }
 
     #[test]
     fn test_escape_octet() {
         let source = r##"b'\43a\4\1234'"##;
         let tokens = lex_source(source);
-        assert_eq!(
-            tokens,
-            vec![
-                Tok::Bytes {
-                    value: b"#a\x04S4".to_vec()
-                },
-                Tok::Newline
-            ]
-        )
+        assert_eq!(tokens, vec![Tok::Bytes { value: b"#a\x04S4".to_vec() }, Tok::Newline])
     }
 
     #[test]
@@ -1883,13 +1773,7 @@ class Foo(A, B):
         let tokens = lex_source(source);
         assert_eq!(
             tokens,
-            vec![
-                Tok::String {
-                    value: "\u{2002}".to_owned(),
-                    is_fstring: false,
-                },
-                Tok::Newline
-            ]
+            vec![Tok::String { value: "\u{2002}".to_owned(), is_fstring: false }, Tok::Newline]
         )
     }
 }

nac3parser/src/lib.rs

@@ -31,5 +31,5 @@ lalrpop_mod!(
     #[allow(unused)]
     python
 );
-pub mod token;
 pub mod config_comment_helper;
+pub mod token;

nac3parser/src/parser.rs

@@ -75,9 +75,7 @@ pub fn parse(source: &str, mode: Mode, file: FileName) -> Result<ast::Mod, Parse
     let marker_token = (Default::default(), mode.to_marker(), Default::default());
     let tokenizer = iter::once(Ok(marker_token)).chain(lxr);
 
-    python::TopParser::new()
-        .parse(tokenizer)
-        .map_err(ParseError::from)
+    python::TopParser::new().parse(tokenizer).map_err(ParseError::from)
 }
 
 #[cfg(test)]

nac3parser/src/token.rs

@@ -1,7 +1,7 @@
 //! Different token definitions.
 //! Loosely based on token.h from CPython source:
-use std::fmt::{self, Write};
 use crate::ast;
+use std::fmt::{self, Write};
 
 /// Python source code can be tokenized in a sequence of these tokens.
 #[derive(Clone, Debug, PartialEq)]
@@ -111,8 +111,16 @@ impl fmt::Display for Tok {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         use Tok::*;
         match self {
-            Name { name } => write!(f, "'{}'", ast::get_str_from_ref(&ast::get_str_ref_lock(), *name)),
-            Int { value } => if *value != i128::MAX { write!(f, "'{}'", value) } else { write!(f, "'#OFL#'") },
+            Name { name } => {
+                write!(f, "'{}'", ast::get_str_from_ref(&ast::get_str_ref_lock(), *name))
+            }
+            Int { value } => {
+                if *value != i128::MAX {
+                    write!(f, "'{}'", value)
+                } else {
+                    write!(f, "'#OFL#'")
+                }
+            }
             Float { value } => write!(f, "'{}'", value),
             Complex { real, imag } => write!(f, "{}j{}", real, imag),
             String { value, is_fstring } => {
@@ -134,7 +142,11 @@ impl fmt::Display for Tok {
                 }
                 f.write_str("\"")
             }
-            ConfigComment { content } => write!(f, "ConfigComment: '{}'", ast::get_str_from_ref(&ast::get_str_ref_lock(), *content)),
+            ConfigComment { content } => write!(
+                f,
+                "ConfigComment: '{}'",
+                ast::get_str_from_ref(&ast::get_str_ref_lock(), *content)
+            ),
             Newline => f.write_str("Newline"),
             Indent => f.write_str("Indent"),
             Dedent => f.write_str("Dedent"),

nac3standalone/Cargo.toml

@@ -13,4 +13,4 @@ nac3core = { path = "../nac3core" }
 git = "https://github.com/nbaksalyar/inkwell.git"
 branch = "llvm14"
 default-features = false
-features = ["llvm14-0", "target-x86", "target-arm", "target-riscv", "no-libffi-linking"]
+features = ["llvm14-0", "target-aarch64", "target-arm", "target-riscv", "no-libffi-linking"]

nac3standalone/src/main.rs

@@ -52,22 +52,16 @@ fn handle_typevar_definition(
                         Default::default(),
                     )?;
                     get_type_from_type_annotation_kinds(
-                        def_list, unifier, primitives, &ty, &mut None
+                        def_list, unifier, primitives, &ty, &mut None,
                     )
                 })
                 .collect::<Result<Vec<_>, _>>()?;
             Ok(unifier.get_fresh_var_with_range(&constraints, None, None).0)
         } else {
-            Err(format!(
-                "expression {:?} cannot be handled as a TypeVar in global scope",
-                var
-            ))
+            Err(format!("expression {:?} cannot be handled as a TypeVar in global scope", var))
         }
     } else {
-        Err(format!(
-            "expression {:?} cannot be handled as a TypeVar in global scope",
-            var
-        ))
+        Err(format!("expression {:?} cannot be handled as a TypeVar in global scope", var))
     }
 }
 
@@ -92,15 +86,13 @@ fn handle_assignment_pattern(
                 ) {
                     internal_resolver.add_id_type(*id, var);
                     Ok(())
-                } else if let Ok(val) =
-                    parse_parameter_default_value(value.borrow(), resolver)
-                {
+                } else if let Ok(val) = parse_parameter_default_value(value.borrow(), resolver) {
                     internal_resolver.add_module_global(*id, val);
                     Ok(())
                 } else {
-                    Err(format!("fails to evaluate this expression `{:?}` as a constant or TypeVar at {}",
-                        targets[0].node,
-                        targets[0].location,
+                    Err(format!(
+                        "fails to evaluate this expression `{:?}` as a constant or TypeVar at {}",
+                        targets[0].node, targets[0].location,
                     ))
                 }
             }
@@ -146,10 +138,7 @@ fn handle_assignment_pattern(
                     Ok(())
                 }
             }
-            _ => Err(format!(
-                "unpack of this expression is not supported at {}",
-                value.location
-            )),
+            _ => Err(format!("unpack of this expression is not supported at {}", value.location)),
         }
     }
 }
@@ -178,7 +167,8 @@ fn main() {
         class_names: Default::default(),
         module_globals: Default::default(),
         str_store: Default::default(),
-    }.into();
+    }
+    .into();
     let resolver =
         Arc::new(Resolver(internal_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
 
@@ -202,13 +192,19 @@ fn main() {
                     eprintln!("{}", err);
                     return;
                 }
-            },
+            }
             // allow (and ignore) "from __future__ import annotations"
             StmtKind::ImportFrom { module, names, .. }
-                if module == &Some("__future__".into()) && names.len() == 1 && names[0].name == "annotations".into() => (),
+                if module == &Some("__future__".into())
+                    && names.len() == 1
+                    && names[0].name == "annotations".into() =>
+            {
+                ()
+            }
             _ => {
-                let (name, def_id, ty) =
-                    composer.register_top_level(stmt, Some(resolver.clone()), "__main__".into()).unwrap();
+                let (name, def_id, ty) = composer
+                    .register_top_level(stmt, Some(resolver.clone()), "__main__".into())
+                    .unwrap();
                 internal_resolver.add_id_def(name, def_id);
                 if let Some(ty) = ty {
                     internal_resolver.add_id_type(name, ty);

nix/llvm/default.nix

@@ -115,7 +115,7 @@ in stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_THREADS=OFF"
     "-DLLVM_INCLUDE_BENCHMARKS=OFF"
     "-DLLVM_BUILD_TOOLS=OFF"
-    "-DLLVM_TARGETS_TO_BUILD=X86;ARM;RISCV"
+    "-DLLVM_TARGETS_TO_BUILD=host;ARM;RISCV"
   ] ++ optionals enableSharedLibraries [
     "-DLLVM_LINK_LLVM_DYLIB=ON"
   ] ++ optionals enableManpages [

runkernel/src/main.rs

@@ -47,12 +47,11 @@ pub extern "C" fn __nac3_personality(_state: u32, _exception_object: u32, _conte
     unimplemented!();
 }
 
-
 fn main() {
     let filename = env::args().nth(1).unwrap();
     unsafe {
         let lib = libloading::Library::new(filename).unwrap();
-        let func: libloading::Symbol<unsafe extern fn()> = lib.get(b"__modinit__").unwrap();
+        let func: libloading::Symbol<unsafe extern "C" fn()> = lib.get(b"__modinit__").unwrap();
         func()
     }
 }