forked from M-Labs/nac3
446 lines
19 KiB
Rust
446 lines
19 KiB
Rust
use std::borrow::Borrow;
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use std::{collections::HashMap, sync::Arc};
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use super::typecheck::type_inferencer::PrimitiveStore;
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use super::typecheck::typedef::{SharedUnifier, Type, TypeEnum, Unifier};
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use crate::symbol_resolver::SymbolResolver;
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use inkwell::context::Context;
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use parking_lot::{Mutex, RwLock};
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use rustpython_parser::ast::{self, Stmt};
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#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
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pub struct DefinitionId(pub usize);
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pub enum TopLevelDef {
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Class {
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// object ID used for TypeEnum
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object_id: DefinitionId,
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// type variables bounded to the class.
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type_vars: Vec<Type>,
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// class fields
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fields: Vec<(String, Type)>,
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// class methods, pointing to the corresponding function definition.
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methods: Vec<(String, Type, DefinitionId)>,
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// ancestor classes, including itself.
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ancestors: Vec<DefinitionId>,
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// symbol resolver of the module defined the class, none if it is built-in type
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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},
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Function {
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// prefix for symbol, should be unique globally, and not ending with numbers
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name: String,
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// function signature.
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signature: Type,
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/// Function instance to symbol mapping
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/// Key: string representation of type variable values, sorted by variable ID in ascending
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/// order, including type variables associated with the class.
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/// Value: function symbol name.
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instance_to_symbol: HashMap<String, String>,
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/// Function instances to annotated AST mapping
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/// Key: string representation of type variable values, sorted by variable ID in ascending
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/// order, including type variables associated with the class. Excluding rigid type
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/// variables.
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/// Value: AST annotated with types together with a unification table index. Could contain
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/// rigid type variables that would be substituted when the function is instantiated.
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instance_to_stmt: HashMap<String, (Stmt<Option<Type>>, usize)>,
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// symbol resolver of the module defined the class
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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},
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Initializer {
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class_id: DefinitionId,
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},
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}
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pub struct TopLevelContext {
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pub definitions: Arc<RwLock<Vec<RwLock<TopLevelDef>>>>,
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pub unifiers: Arc<RwLock<Vec<(SharedUnifier, PrimitiveStore)>>>,
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pub conetexts: Arc<RwLock<Vec<Mutex<Context>>>>,
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}
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// like adding some info on top of the TopLevelDef for
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// later parsing the class bases, method, and function sigatures
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pub struct TopLevelDefInfo {
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// the definition entry
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def: TopLevelDef,
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// the entry in the top_level unifier
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ty: Type,
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// the ast submitted by applications, primitives and
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// class methods will have None value here
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ast: Option<ast::Stmt<()>>,
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}
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pub struct TopLevelComposer {
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// list of top level definitions and their info
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pub definition_list: RwLock<Vec<TopLevelDefInfo>>,
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// primitive store
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pub primitives: PrimitiveStore,
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// start as a primitive unifier, will add more top_level defs inside
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pub unifier: Unifier,
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// mangled class method name to def_id
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pub class_method_to_def_id: HashMap<String, DefinitionId>,
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}
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impl TopLevelComposer {
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fn name_mangling(mut class_name: String, method_name: &str) -> String {
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class_name.push_str(method_name);
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class_name
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}
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pub fn make_primitives() -> (PrimitiveStore, Unifier) {
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let mut unifier = Unifier::new();
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let int32 = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(0),
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fields: HashMap::new().into(),
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params: HashMap::new().into(),
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});
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let int64 = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(1),
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fields: HashMap::new().into(),
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params: HashMap::new().into(),
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});
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let float = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(2),
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fields: HashMap::new().into(),
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params: HashMap::new().into(),
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});
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let bool = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(3),
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fields: HashMap::new().into(),
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params: HashMap::new().into(),
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});
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let none = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(4),
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fields: HashMap::new().into(),
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params: HashMap::new().into(),
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});
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let primitives = PrimitiveStore { int32, int64, float, bool, none };
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crate::typecheck::magic_methods::set_primitives_magic_methods(&primitives, &mut unifier);
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(primitives, unifier)
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}
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/// return a composer and things to make a "primitive" symbol resolver, so that the symbol
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/// resolver can later figure out primitive type definitions when passed a primitive type name
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pub fn new() -> (Vec<(String, DefinitionId, Type)>, Self) {
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let primitives = Self::make_primitives();
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// the def list including the entries of primitive info
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let definition_list: Vec<TopLevelDefInfo> = vec![
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TopLevelDefInfo {
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def: Self::make_top_level_class_def(0, None),
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ast: None,
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ty: primitives.0.int32,
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},
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TopLevelDefInfo {
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def: Self::make_top_level_class_def(1, None),
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ast: None,
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ty: primitives.0.int64,
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},
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TopLevelDefInfo {
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def: Self::make_top_level_class_def(2, None),
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ast: None,
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ty: primitives.0.float,
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},
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TopLevelDefInfo {
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def: Self::make_top_level_class_def(3, None),
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ast: None,
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ty: primitives.0.bool,
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},
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TopLevelDefInfo {
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def: Self::make_top_level_class_def(4, None),
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ast: None,
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ty: primitives.0.none,
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},
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];
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let composer = TopLevelComposer {
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definition_list: definition_list.into(),
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primitives: primitives.0,
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unifier: primitives.1,
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class_method_to_def_id: Default::default(),
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};
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(vec![
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("int32".into(), DefinitionId(0), composer.primitives.int32),
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("int64".into(), DefinitionId(1), composer.primitives.int64),
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("float".into(), DefinitionId(2), composer.primitives.float),
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("bool".into(), DefinitionId(3), composer.primitives.bool),
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("none".into(), DefinitionId(4), composer.primitives.none),
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], composer)
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}
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/// already include the definition_id of itself inside the ancestors vector
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pub fn make_top_level_class_def(
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index: usize,
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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) -> TopLevelDef {
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TopLevelDef::Class {
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object_id: DefinitionId(index),
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type_vars: Default::default(),
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fields: Default::default(),
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methods: Default::default(),
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ancestors: vec![DefinitionId(index)],
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resolver,
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}
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}
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pub fn make_top_level_function_def(
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name: String,
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ty: Type,
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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) -> TopLevelDef {
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TopLevelDef::Function {
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name,
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signature: ty,
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instance_to_symbol: Default::default(),
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instance_to_stmt: Default::default(),
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resolver,
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}
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}
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pub fn register_top_level(
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&mut self,
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ast: ast::Stmt<()>,
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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) -> Result<(String, DefinitionId, Type), String> {
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match &ast.node {
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ast::StmtKind::ClassDef { name, body, .. } => {
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let class_name = name.to_string();
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let mut def_list = self.definition_list.write();
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let class_def_id = def_list.len();
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// add the class to the unifier
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let ty = self.unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(class_def_id),
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fields: Default::default(),
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params: Default::default(),
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});
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// add the class to the definition list
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def_list.push(TopLevelDefInfo {
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def: Self::make_top_level_class_def(class_def_id, resolver.clone()),
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// NOTE: Temporarily none here since function body need to be read later
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ast: None,
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ty,
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});
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// parse class def body and register class methods into the def list
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// module's symbol resolver would not know the name of the class methods,
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// thus cannot return their definition_id? so we have to manage it ourselves
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// by using the field `class_method_to_def_id`
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for b in body {
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if let ast::StmtKind::FunctionDef { name, .. } = &b.node {
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let fun_name = Self::name_mangling(class_name.clone(), name);
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let def_id = def_list.len();
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// add to unifier
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let ty = self.unifier.add_ty(TypeEnum::TFunc(
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crate::typecheck::typedef::FunSignature {
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args: Default::default(),
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ret: self.primitives.none,
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vars: Default::default(),
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},
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));
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// add to the definition list
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def_list.push(TopLevelDefInfo {
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def: Self::make_top_level_function_def(fun_name.clone(), ty, resolver.clone()),
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ty,
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// since it is inside the class def body statments, the ast is None
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ast: None,
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});
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// class method, do not let the symbol manager manage it, use our own map
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self.class_method_to_def_id.insert(fun_name, DefinitionId(def_id));
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// if it is the contructor, special handling is needed. In the above
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// handling, we still add __init__ function to the class method
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if name == "__init__" {
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// FIXME: how can this later be fetched?
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def_list.push(TopLevelDefInfo {
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def: TopLevelDef::Initializer { class_id: DefinitionId(class_def_id) },
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// arbitary picked one for the constructor
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ty: self.primitives.none,
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// it is inside the class def body statments, so None
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ast: None,
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})
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}
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}
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}
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// move the ast to the entry of the class in the def_list
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def_list.get_mut(class_def_id).unwrap().ast = Some(ast);
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// return
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Ok((class_name, DefinitionId(class_def_id), ty))
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},
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ast::StmtKind::FunctionDef { name, .. } => {
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let fun_name = name.to_string();
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// add to the unifier
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let ty = self.unifier.add_ty(TypeEnum::TFunc(crate::typecheck::typedef::FunSignature {
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args: Default::default(),
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ret: self.primitives.none,
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vars: Default::default(),
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}));
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// add to the definition list
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let mut def_list = self.definition_list.write();
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def_list.push(TopLevelDefInfo {
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def: Self::make_top_level_function_def(
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name.into(),
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self.primitives.none,
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resolver,
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),
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ast: Some(ast),
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ty,
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});
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Ok((fun_name, DefinitionId(def_list.len() - 1), ty))
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}
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_ => Err("only registrations of top level classes/functions are supprted".into()),
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}
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}
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/// this should be called after all top level classes are registered, and will actually fill in those fields of the previous dummy one
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pub fn analyze_top_level(&mut self) -> Result<(), String> {
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for d in self.definition_list.write().iter_mut() {
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// only analyze those with ast, and class_method(ast in class def)
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if let Some(ast) = &d.ast {
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match &ast.node {
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ast::StmtKind::ClassDef {
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bases,
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body,
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..
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} => {
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// get the mutable reference of the entry in the definition list, get the `TopLevelDef`
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let (
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ancestors,
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fields,
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methods,
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type_vars,
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resolver,
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) = if let TopLevelDef::Class {
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object_id: _,
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ancestors,
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fields,
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methods,
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type_vars,
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resolver: Some(resolver)
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} = &mut d.def {
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(ancestors, fields, methods, type_vars, resolver.lock())
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} else { unreachable!() };
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// try to get mutable reference of the entry in the unification table, get the `TypeEnum`
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let (params,
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fields
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) = if let TypeEnum::TObj {
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params,
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fields,
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..
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} = self.unifier.get_ty(d.ty).borrow() {
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(params, fields)
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} else { unreachable!() };
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// ancestors and typevars associate with the class are analyzed by looking
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// into the `bases` ast node
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for b in bases {
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match &b.node {
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// typevars bounded to the class, only support things like `class A(Generic[T, V])`,
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// things like `class A(Generic[T, V, ImportedModule.T])` is not supported
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// i.e. only simple names are allowed in the subscript
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// should update the TopLevelDef::Class.typevars and the TypeEnum::TObj.params
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ast::ExprKind::Subscript {value, slice, ..} if {
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if let ast::ExprKind::Name {id, ..} = &value.node {
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id == "Generic"
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} else { false }
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} => {
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match &slice.node {
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// `class Foo(Generic[T, V, P]):`
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ast::ExprKind::Tuple {elts, ..} => {
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for e in elts {
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// let ty_def_id = resolver.
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}
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},
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// `class Foo(Generic[T]):`
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ast::ExprKind::Name {id, ..} => {
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// the def_list
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// type_vars.push(resolver.get_symbol_type(id).ok_or_else(|| "unknown type variable".to_string())?); FIXME:
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unimplemented!()
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},
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_ => return Err("not supported, only simple names are allowed in the subscript".into())
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};
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},
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/* // base class, name directly available inside the
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// module, can use this module's symbol resolver
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ast::ExprKind::Name {id, ..} => {
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// let def_id = resolver.get_identifier_def(id); FIXME:
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// the definition list
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// ancestors.push(def_id);
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},
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// base class, things can be like `class A(BaseModule.Base)`, here we have to get the
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// symbol resolver of the module `BaseModule`?
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ast::ExprKind::Attribute {value, attr, ..} => {
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if let ast::ExprKind::Name {id, ..} = &value.node {
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// if let Some(base_module_resolver) = resolver.get_module_resolver(id) {
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// let def_id = base_module_resolver.get_identifier_def(attr);
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// // the definition list
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// ancestors.push(def_id);
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// } else { return Err("unkown imported module".into()) } FIXME:
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} else { return Err("unkown imported module".into()) }
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},
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// `class Foo(ImportedModule.A[int, bool])`, A is a class with associated type variables
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ast::ExprKind::Subscript {value, slice, ..} => {
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unimplemented!()
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}, */
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// base class is possible in other cases, we parse for thr base class
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_ => return Err("not supported".into())
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}
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}
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// class method and field are analyzed by
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// looking into the class body ast node
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for stmt in body {
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if let ast::StmtKind::FunctionDef {
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name,
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args,
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body,
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returns,
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..
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} = &stmt.node {
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} else { }
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// do nothing. we do not care about things like this?
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// class A:
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// a = 3
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// b = [2, 3]
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}
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},
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// top level function definition
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ast::StmtKind::FunctionDef {
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name,
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args,
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body,
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returns,
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..
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} => {
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unimplemented!()
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}
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node => {
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return Err("only expect function and class definitions to be submitted here to be analyzed".into())
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}
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}
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}
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}
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Ok(())
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}
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}
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