nac3core/src/typecheck/context.rs

@@ -1,191 +0,0 @@
-use std::collections::HashMap;
-use std::collections::HashSet;
-
-use super::primitives::get_var;
-use super::symbol_resolver::*;
-use super::typedef::*;
-use rustpython_parser::ast::Location;
-
-/// Structure for storing top-level type definitions.
-/// Used for collecting type signature from source code.
-/// Can be converted to `InferenceContext` for type inference in functions.
-#[derive(Clone)]
-pub struct GlobalContext<'a> {
-    /// List of type definitions.
-    pub type_defs: Vec<TypeDef<'a>>,
-    /// List of type variable definitions.
-    pub var_defs: Vec<VarDef<'a>>,
-}
-
-impl<'a> GlobalContext<'a> {
-    pub fn new(type_defs: Vec<TypeDef<'a>>) -> GlobalContext {
-        GlobalContext {
-            type_defs,
-            var_defs: Vec::new(),
-        }
-    }
-
-    pub fn add_type(&mut self, def: TypeDef<'a>) -> TypeId {
-        self.type_defs.push(def);
-        TypeId(self.type_defs.len() - 1)
-    }
-
-    pub fn add_variable(&mut self, def: VarDef<'a>) -> VariableId {
-        self.var_defs.push(def);
-        VariableId(self.var_defs.len() - 1)
-    }
-
-    pub fn get_type_def_mut(&mut self, id: TypeId) -> &mut TypeDef<'a> {
-        self.type_defs.get_mut(id.0).unwrap()
-    }
-
-    pub fn get_type_def(&self, id: TypeId) -> &TypeDef {
-        self.type_defs.get(id.0).unwrap()
-    }
-
-    pub fn get_var_def(&self, id: VariableId) -> &VarDef {
-        self.var_defs.get(id.0).unwrap()
-    }
-
-    pub fn get_var_count(&self) -> usize {
-        self.var_defs.len()
-    }
-}
-
-pub struct InferenceContext<'a> {
-    // a: (i, x) means that a.i = x
-    pub fields_assignment: HashMap<VariableId, Vec<(&'a str, VariableId, Location)>>,
-    pub constraints: Vec<(Type, Type)>,
-    global: GlobalContext<'a>,
-    resolver: Box<dyn SymbolResolver>,
-    local_identifiers: HashMap<&'a str, Type>,
-    local_variables: Vec<VarDef<'a>>,
-    fresh_var_id: usize,
-}
-
-impl<'a> InferenceContext<'a> {
-    pub fn new(
-        global: GlobalContext<'a>,
-        resolver: Box<dyn SymbolResolver>,
-    ) -> InferenceContext<'a> {
-        let id = global.get_var_count();
-        InferenceContext {
-            global,
-            fields_assignment: HashMap::new(),
-            constraints: Vec::new(),
-            resolver,
-            local_identifiers: HashMap::new(),
-            local_variables: Vec::new(),
-            fresh_var_id: id,
-        }
-    }
-
-    fn get_fresh_var(&mut self) -> VariableId {
-        self.local_variables.push(VarDef {
-            name: None,
-            bound: Vec::new(),
-        });
-        let id = self.fresh_var_id;
-        self.fresh_var_id += 1;
-        VariableId(id)
-    }
-
-    fn get_fresh_var_with_bound(&mut self, bound: Vec<Type>) -> VariableId {
-        self.local_variables.push(VarDef { name: None, bound });
-        let id = self.fresh_var_id;
-        self.fresh_var_id += 1;
-        VariableId(id)
-    }
-
-    pub fn assign_identifier(&mut self, identifier: &'a str) -> Type {
-        if let Some(t) = self.local_identifiers.get(identifier) {
-            t.clone()
-        } else if let Some(SymbolType::Identifier(t)) = self.resolver.get_symbol_type(identifier) {
-            t
-        } else {
-            get_var(self.get_fresh_var())
-        }
-    }
-
-    pub fn get_identifier_type(&self, identifier: &'a str) -> Result<Type, String> {
-        if let Some(t) = self.local_identifiers.get(identifier) {
-            Ok(t.clone())
-        } else if let Some(SymbolType::Identifier(t)) = self.resolver.get_symbol_type(identifier) {
-            Ok(t)
-        } else {
-            Err("unbounded identifier".into())
-        }
-    }
-
-    pub fn get_attribute_type(
-        &mut self,
-        expr: Type,
-        identifier: &'a str,
-        location: Location,
-    ) -> Result<Type, String> {
-        match expr.as_ref() {
-            TypeEnum::TypeVariable(id) => {
-                if !self.fields_assignment.contains_key(id) {
-                    self.fields_assignment.insert(*id, Vec::new());
-                }
-                let var_id = VariableId(self.fresh_var_id);
-                let entry = self.fields_assignment.get_mut(&id).unwrap();
-                for (attr, t, _) in entry.iter() {
-                    if *attr == identifier {
-                        return Ok(get_var(*t));
-                    }
-                }
-                entry.push((identifier, var_id, location));
-                self.local_variables.push(VarDef {
-                    name: None,
-                    bound: Vec::new(),
-                });
-                self.fresh_var_id += 1;
-                Ok(get_var(var_id))
-            }
-            TypeEnum::ClassType(id, params) => {
-                let type_def = self.global.get_type_def(*id);
-                let field = type_def
-                    .base
-                    .fields
-                    .get(identifier)
-                    .map_or_else(|| Err("no such field".to_owned()), Ok)?;
-                // function and tuple can have 0 type variables but with type parameters
-                // we require other types have the same number of type variables and type
-                // parameters in order to build a mapping
-                assert!(type_def.params.is_empty() || type_def.params.len() == params.len());
-                let map = type_def
-                    .params
-                    .clone()
-                    .into_iter()
-                    .zip(params.clone().into_iter())
-                    .collect();
-                let field = field.subst(&map);
-                Ok(self.get_instance(field))
-            }
-        }
-    }
-
-    fn get_instance(&mut self, t: Type) -> Type {
-        let mut vars = HashSet::new();
-        t.get_vars(&mut vars);
-
-        let local_min = self.global.get_var_count();
-        let bounded = vars.into_iter().filter(|id| id.0 < local_min);
-        let map = bounded
-            .map(|v| {
-                (
-                    v,
-                    get_var(
-                        self.get_fresh_var_with_bound(self.global.get_var_def(v).bound.clone()),
-                    ),
-                )
-            })
-            .collect();
-        t.subst(&map)
-    }
-
-    pub fn get_type_def(&self, id: TypeId) -> &TypeDef {
-        self.global.get_type_def(id)
-    }
-}

nac3core/src/typecheck/mod.rs

@@ -1,8 +1,6 @@
 #![allow(dead_code)]
-// mod context;
+pub mod location;
-// pub mod location;
+mod magic_methods;
-// mod magic_methods;
+pub mod symbol_resolver;
-// mod primitives;
-// pub mod symbol_resolver;
 mod test_typedef;
 pub mod typedef;

nac3core/src/typecheck/primitives.rs

@@ -1,168 +0,0 @@
-use super::context::*;
-use super::typedef::{TypeEnum::*, *};
-use std::collections::HashMap;
-use std::rc::Rc;
-
-pub const FUNC_TYPE: TypeId = TypeId(0);
-pub const TUPLE_TYPE: TypeId = TypeId(1);
-pub const LIST_TYPE: TypeId = TypeId(2);
-pub const VIRTUAL_TYPE: TypeId = TypeId(3);
-pub const NONE_TYPE: TypeId = TypeId(4);
-
-pub const BOOL_TYPE: TypeId = TypeId(5);
-pub const INT32_TYPE: TypeId = TypeId(6);
-pub const INT64_TYPE: TypeId = TypeId(7);
-pub const FLOAT_TYPE: TypeId = TypeId(8);
-
-fn primitive(base: BaseDef) -> TypeDef {
-    TypeDef {
-        base,
-        parents: vec![],
-        params: vec![],
-    }
-}
-
-pub fn get_fn(from: Type, to: Type) -> Type {
-    Rc::new(ClassType(FUNC_TYPE, vec![from, to]))
-}
-
-pub fn get_tuple(types: &[Type]) -> Type {
-    Rc::new(ClassType(TUPLE_TYPE, types.to_vec()))
-}
-
-pub fn get_list(t: Type) -> Type {
-    Rc::new(ClassType(LIST_TYPE, vec![t]))
-}
-
-pub fn get_virtual(t: Type) -> Type {
-    Rc::new(ClassType(VIRTUAL_TYPE, vec![t]))
-}
-
-pub fn get_none() -> Type {
-    Rc::new(ClassType(NONE_TYPE, Vec::new()))
-}
-
-pub fn get_bool() -> Type {
-    Rc::new(ClassType(BOOL_TYPE, Vec::new()))
-}
-pub fn get_int32() -> Type {
-    Rc::new(ClassType(INT32_TYPE, Vec::new()))
-}
-
-pub fn get_int64() -> Type {
-    Rc::new(ClassType(INT64_TYPE, Vec::new()))
-}
-
-pub fn get_float() -> Type {
-    Rc::new(ClassType(FLOAT_TYPE, Vec::new()))
-}
-
-pub fn get_var(id: VariableId) -> Type {
-    Rc::new(TypeVariable(id))
-}
-
-fn impl_math(def: &mut BaseDef, ty: &Type) {
-    let fun = get_fn(ty.clone(), ty.clone());
-    def.fields.insert("__add__", fun.clone());
-    def.fields.insert("__sub__", fun.clone());
-    def.fields.insert("__mul__", fun.clone());
-    def.fields.insert("__neg__", get_fn(get_none(), ty.clone()));
-    def.fields
-        .insert("__truediv__", get_fn(ty.clone(), get_float()));
-    def.fields.insert("__floordiv__", fun.clone());
-    def.fields.insert("__mod__", fun.clone());
-    def.fields.insert("__pow__", fun);
-}
-
-fn impl_bits(def: &mut BaseDef, ty: &Type) {
-    let fun = get_fn(get_int32(), ty.clone());
-
-    def.fields.insert("__lshift__", fun.clone());
-    def.fields.insert("__rshift__", fun);
-    def.fields.insert("__xor__", get_fn(ty.clone(), ty.clone()));
-}
-
-fn impl_eq(def: &mut BaseDef, ty: &Type) {
-    let fun = get_fn(ty.clone(), get_bool());
-
-    def.fields.insert("__eq__", fun.clone());
-    def.fields.insert("__ne__", fun);
-}
-
-fn impl_order(def: &mut BaseDef, ty: &Type) {
-    let fun = get_fn(ty.clone(), get_bool());
-
-    def.fields.insert("__lt__", fun.clone());
-    def.fields.insert("__gt__", fun.clone());
-    def.fields.insert("__le__", fun.clone());
-    def.fields.insert("__ge__", fun);
-}
-
-pub fn basic_ctx() -> GlobalContext<'static> {
-    let mut ctx = GlobalContext::new(vec![
-        primitive(BaseDef {
-            name: "function",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "tuple",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "list",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "virtual",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "None",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "bool",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "int32",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "int64",
-            fields: HashMap::new(),
-        }),
-        primitive(BaseDef {
-            name: "float",
-            fields: HashMap::new(),
-        }),
-    ]);
-
-    let t = ctx.add_variable(VarDef {
-        name: Some("T"),
-        bound: vec![],
-    });
-    ctx.get_type_def_mut(LIST_TYPE).params.push(t);
-
-    let b_def = ctx.get_type_def_mut(BOOL_TYPE);
-    impl_eq(&mut b_def.base, &get_bool());
-    let int32 = get_int32();
-    let int32_def = &mut ctx.get_type_def_mut(INT32_TYPE).base;
-    impl_math(int32_def, &int32);
-    impl_bits(int32_def, &int32);
-    impl_order(int32_def, &int32);
-    impl_eq(int32_def, &int32);
-    let int64 = get_int64();
-    let int64_def = &mut ctx.get_type_def_mut(INT64_TYPE).base;
-    impl_math(int64_def, &int64);
-    impl_bits(int64_def, &int64);
-    impl_order(int64_def, &int64);
-    impl_eq(int64_def, &int64);
-    let float = get_float();
-    let float_def = &mut ctx.get_type_def_mut(FLOAT_TYPE).base;
-    impl_math(float_def, &float);
-    impl_order(float_def, &float);
-    impl_eq(float_def, &float);
-
-    ctx
-}

nac3core/src/typecheck/typedef.rs

@@ -436,7 +436,7 @@ impl Unifier {
                             .collect();
                         for (i, t) in posargs.iter().enumerate() {
                             if signature.args.len() <= i {
-                                return Err(format!("Too many arguments."));
+                                return Err("Too many arguments.".to_string());
                             }
                             if !required.is_empty() {
                                 required.pop();
@@ -465,17 +465,17 @@ impl Unifier {
             TypeEnum::TFunc(sign1) => {
                 if let TypeEnum::TFunc(sign2) = &*ty_b {
                     if !sign1.params.is_empty() || !sign2.params.is_empty() {
-                        return Err(format!("Polymorphic function pointer is prohibited."));
+                        return Err("Polymorphic function pointer is prohibited.".to_string());
                     }
                     if sign1.args.len() != sign2.args.len() {
-                        return Err(format!("Functions differ in number of parameters."));
+                        return Err("Functions differ in number of parameters.".to_string());
                     }
                     for (x, y) in sign1.args.iter().zip(sign2.args.iter()) {
                         if x.name != y.name {
-                            return Err(format!("Functions differ in parameter names."));
+                            return Err("Functions differ in parameter names.".to_string());
                         }
                         if x.is_optional != y.is_optional {
-                            return Err(format!("Functions differ in optional parameters."));
+                            return Err("Functions differ in optional parameters.".to_string());
                         }
                         self.unify(x.ty, y.ty)?;
                     }
@@ -651,7 +651,7 @@ impl Unifier {
                     let params = new_params.unwrap_or_else(|| params.clone());
                     let ret = new_ret.unwrap_or_else(|| *ret);
                     let args = new_args.unwrap_or_else(|| args.clone());
-                    Some(self.add_ty(TypeEnum::TFunc(FunSignature { params, ret, args })))
+                    Some(self.add_ty(TypeEnum::TFunc(FunSignature { args, ret, params })))
                 } else {
                     None
                 }