forked from M-Labs/nac3
677 lines
29 KiB
Rust
677 lines
29 KiB
Rust
use std::borrow::BorrowMut;
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use std::ops::Deref;
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use std::{collections::HashMap, collections::HashSet, 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 crate::typecheck::typedef::{FunSignature, FuncArg};
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use itertools::chain;
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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 + Sync>>>,
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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 + Sync>>>,
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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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impl TopLevelDef {
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fn get_function_type(&self) -> Result<Type, String> {
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if let Self::Function { signature, .. } = self {
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Ok(*signature)
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} else {
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Err("only expect function def here".into())
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}
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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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}
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pub struct TopLevelComposer {
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// list of top level definitions, same as top level context
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pub definition_list: Arc<RwLock<Vec<RwLock<TopLevelDef>>>>,
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// list of top level ast, the index is same as the field `definition_list`
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pub ast_list: Vec<Option<ast::Stmt<()>>>,
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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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// primitive store
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pub primitives: PrimitiveStore,
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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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// record the def id of the classes whoses fields and methods are to be analyzed
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pub to_be_analyzed_class: Vec<DefinitionId>,
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}
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impl TopLevelComposer {
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pub fn to_top_level_context(&self) -> TopLevelContext {
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TopLevelContext {
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definitions: self.definition_list.clone(),
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// FIXME: all the big unifier or?
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unifiers: Default::default(),
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}
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}
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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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let top_level_def_list = vec![
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RwLock::new(Self::make_top_level_class_def(0, None)),
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RwLock::new(Self::make_top_level_class_def(1, None)),
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RwLock::new(Self::make_top_level_class_def(2, None)),
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RwLock::new(Self::make_top_level_class_def(3, None)),
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RwLock::new(Self::make_top_level_class_def(4, None)),
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];
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let ast_list: Vec<Option<ast::Stmt<()>>> = vec![None, None, None, None, None];
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let composer = TopLevelComposer {
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definition_list: RwLock::new(top_level_def_list).into(),
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ast_list,
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primitives: primitives.0,
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unifier: primitives.1.into(),
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class_method_to_def_id: Default::default(),
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to_be_analyzed_class: Default::default(),
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};
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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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],
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composer,
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)
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}
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/// already include the definition_id of itself inside the ancestors vector
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/// when first regitering, the type_vars, fields, methods, ancestors are invalid
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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 + Sync>>>,
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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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/// when first registering, the type is a invalid value
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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 + Sync>>>,
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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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/// step 0, register, just remeber the names of top level classes/function
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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 + Sync>>>,
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) -> Result<(String, DefinitionId), String> {
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let (mut def_list, ast_list) = (self.definition_list.write(), &mut self.ast_list);
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assert_eq!(def_list.len(), ast_list.len());
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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 class_def_id = def_list.len();
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// add the class to the definition lists
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def_list
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.push(Self::make_top_level_class_def(class_def_id, resolver.clone()).into());
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// since later when registering class method, ast will still be used,
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// here push None temporarly, later will move the ast inside
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ast_list.push(None);
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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 `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 the definition list
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def_list.push(
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Self::make_top_level_function_def(
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fun_name.clone(),
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self.unifier.add_ty(TypeEnum::TFunc(
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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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.into(),
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)),
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resolver.clone(),
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)
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.into(),
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);
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// the ast of class method is in the class, push None in to the list here
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ast_list.push(None);
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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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}
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}
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// move the ast to the entry of the class in the ast_list
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ast_list[class_def_id] = Some(ast);
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// put the constructor into the def_list
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def_list
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.push(TopLevelDef::Initializer { class_id: DefinitionId(class_def_id) }.into());
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ast_list.push(None);
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// class, put its def_id into the to be analyzed set
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let to_be_analyzed = &mut self.to_be_analyzed_class;
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to_be_analyzed.push(DefinitionId(class_def_id));
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Ok((class_name, DefinitionId(class_def_id)))
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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 definition list
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def_list.push(
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Self::make_top_level_function_def(name.into(), self.primitives.none, resolver)
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.into(),
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);
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ast_list.push(Some(ast));
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// return
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Ok((fun_name, DefinitionId(def_list.len() - 1)))
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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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/// step 1, analyze the type vars associated with top level class
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fn analyze_top_level_class_type_var(&mut self) -> Result<(), String> {
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let mut def_list = self.definition_list.write();
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let ast_list = &self.ast_list;
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let converted_top_level = &self.to_top_level_context();
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let primitives = &self.primitives;
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let unifier = &mut self.unifier;
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for (class_def, class_ast) in def_list
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.iter_mut()
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.zip(ast_list.iter())
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.collect::<Vec<(&mut RwLock<TopLevelDef>, &Option<ast::Stmt<()>>)>>()
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{
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// only deal with class def here
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let (class_bases, class_def_type_vars, class_resolver) = {
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if let TopLevelDef::Class { type_vars, resolver, .. } = class_def.get_mut() {
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if let Some(ast::Located {
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node: ast::StmtKind::ClassDef { bases, .. }, ..
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}) = class_ast
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{
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(bases, type_vars, resolver)
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} else {
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unreachable!("must be both class")
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}
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} else {
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continue;
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}
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};
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let mut is_generic = false;
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for b in class_bases {
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match &b.node {
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// analyze typevars bounded to the class,
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// 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, .. }
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if {
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matches!(&value.node, ast::ExprKind::Name { id, .. } if id == "Generic")
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} =>
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{
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if !is_generic {
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is_generic = true;
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} else {
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return Err("Only single Generic[...] can be in bases".into());
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}
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// if `class A(Generic[T, V, G])`
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if let ast::ExprKind::Tuple { elts, .. } = &slice.node {
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// parse the type vars
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let type_vars = elts
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.iter()
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.map(|e| {
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class_resolver.as_ref().unwrap().lock().parse_type_annotation(
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converted_top_level,
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unifier.borrow_mut(),
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primitives,
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e,
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)
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})
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.collect::<Result<Vec<_>, _>>()?;
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// check if all are unique type vars
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let mut occured_type_var_id: HashSet<u32> = HashSet::new();
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let all_unique_type_var = type_vars.iter().all(|x| {
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let ty = unifier.get_ty(*x);
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if let TypeEnum::TVar { id, .. } = ty.as_ref() {
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occured_type_var_id.insert(*id)
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} else {
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false
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}
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});
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if !all_unique_type_var {
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return Err("expect unique type variables".into());
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}
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// add to TopLevelDef
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class_def_type_vars.extend(type_vars);
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// `class A(Generic[T])`
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} else {
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let ty =
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class_resolver.as_ref().unwrap().lock().parse_type_annotation(
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converted_top_level,
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unifier.borrow_mut(),
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primitives,
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&slice,
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)?;
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// check if it is type var
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let is_type_var =
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matches!(unifier.get_ty(ty).as_ref(), &TypeEnum::TVar { .. });
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if !is_type_var {
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return Err("expect type variable here".into());
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}
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// add to TopLevelDef
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class_def_type_vars.push(ty);
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}
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}
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// if others, do nothing in this function
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_ => continue,
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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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/// step 2, base classes. Need to separate step1 and step2 for this reason:
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/// `class B(Generic[T, V]);
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/// class A(B[int, bool])`
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/// if the type var associated with class `B` has not been handled properly,
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/// the parse of type annotation of `B[int, bool]` will fail
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fn analyze_top_level_class_bases(&mut self) -> Result<(), String> {
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let mut def_list = self.definition_list.write();
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let ast_list = &self.ast_list;
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let converted_top_level = &self.to_top_level_context();
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let primitives = &self.primitives;
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let unifier = &mut self.unifier;
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for (class_def, class_ast) in def_list
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.iter_mut()
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.zip(ast_list.iter())
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.collect::<Vec<(&mut RwLock<TopLevelDef>, &Option<ast::Stmt<()>>)>>()
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{
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let (class_bases, class_ancestors, class_resolver) = {
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if let TopLevelDef::Class { ancestors, resolver, .. } = class_def.get_mut() {
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if let Some(ast::Located {
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node: ast::StmtKind::ClassDef { bases, .. }, ..
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}) = class_ast
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{
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(bases, ancestors, resolver)
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} else {
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unreachable!("must be both class")
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}
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} else {
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continue;
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}
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};
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for b in class_bases {
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// type vars have already been handled, so skip on `Generic[...]`
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if let ast::ExprKind::Subscript { value, .. } = &b.node {
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if let ast::ExprKind::Name { id, .. } = &value.node {
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if id == "Generic" {
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continue;
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}
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}
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}
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// get the def id of the base class
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let base_ty = class_resolver.as_ref().unwrap().lock().parse_type_annotation(
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converted_top_level,
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unifier.borrow_mut(),
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primitives,
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b,
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)?;
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let base_id =
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if let TypeEnum::TObj { obj_id, .. } = unifier.get_ty(base_ty).as_ref() {
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*obj_id
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} else {
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return Err("expect concrete class/type to be base class".into());
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};
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// write to the class ancestors
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class_ancestors.push(base_id);
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}
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}
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Ok(())
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}
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/// step 3, class fields and methods
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fn analyze_top_level_class_fields_methods(&mut self) -> Result<(), String> {
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let mut def_list = self.definition_list.write();
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let ast_list = &self.ast_list;
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let converted_top_level = &self.to_top_level_context();
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let class_method_to_def_id = &self.class_method_to_def_id;
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let primitives = &self.primitives;
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let to_be_analyzed_class = &mut self.to_be_analyzed_class;
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let unifier = &mut self.unifier;
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while !to_be_analyzed_class.is_empty() {
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let class_ind = to_be_analyzed_class.remove(0).0;
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let (class_name, class_body) = {
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let class_ast = &ast_list[class_ind];
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if let Some(ast::Located {
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node: ast::StmtKind::ClassDef { name, body, .. }, ..
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}) = class_ast
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{
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(name, body)
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} else {
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unreachable!("should be class def ast")
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}
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};
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let class_methods_parsing_result: Vec<(String, Type, DefinitionId)> =
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Default::default();
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let class_fields_parsing_result: Vec<(String, Type)> = Default::default();
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for b in class_body {
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if let ast::StmtKind::FunctionDef {
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args: method_args_ast,
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body: method_body_ast,
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name: method_name,
|
|
returns: method_returns_ast,
|
|
..
|
|
} = &b.node
|
|
{
|
|
let (class_def, method_def) = {
|
|
// unwrap should not fail
|
|
let method_ind = class_method_to_def_id
|
|
.get(&Self::name_mangling(class_name.into(), method_name))
|
|
.unwrap()
|
|
.0;
|
|
|
|
// split the def_list to two parts to get the
|
|
// mutable reference to both the method and the class
|
|
assert_ne!(method_ind, class_ind);
|
|
let min_ind =
|
|
(if method_ind > class_ind { class_ind } else { method_ind }) + 1;
|
|
let (head_slice, tail_slice) = def_list.split_at_mut(min_ind);
|
|
let (new_method_ind, new_class_ind) = (
|
|
if method_ind >= min_ind { method_ind - min_ind } else { method_ind },
|
|
if class_ind >= min_ind { class_ind - min_ind } else { class_ind },
|
|
);
|
|
if new_class_ind == class_ind {
|
|
(&mut head_slice[new_class_ind], &mut tail_slice[new_method_ind])
|
|
} else {
|
|
(&mut tail_slice[new_class_ind], &mut head_slice[new_method_ind])
|
|
}
|
|
};
|
|
let (class_fields, class_methods, class_resolver) = {
|
|
if let TopLevelDef::Class { resolver, fields, methods, .. } =
|
|
class_def.get_mut()
|
|
{
|
|
(fields, methods, resolver)
|
|
} else {
|
|
unreachable!("must be class def here")
|
|
}
|
|
};
|
|
|
|
let arg_tys = method_args_ast
|
|
.args
|
|
.iter()
|
|
.map(|x| -> Result<Type, String> {
|
|
if x.node.arg != "self" {
|
|
let annotation = x
|
|
.node
|
|
.annotation
|
|
.as_ref()
|
|
.ok_or_else(|| {
|
|
"type annotation for function parameter is needed".to_string()
|
|
})?
|
|
.as_ref();
|
|
|
|
let ty =
|
|
class_resolver.as_ref().unwrap().lock().parse_type_annotation(
|
|
converted_top_level,
|
|
unifier.borrow_mut(),
|
|
primitives,
|
|
annotation,
|
|
)?;
|
|
Ok(ty)
|
|
} else {
|
|
// TODO: handle self, how
|
|
unimplemented!()
|
|
}
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
|
|
let ret_ty = if method_name != "__init__" {
|
|
method_returns_ast
|
|
.as_ref()
|
|
.map(|x|
|
|
class_resolver.as_ref().unwrap().lock().parse_type_annotation(
|
|
converted_top_level,
|
|
unifier.borrow_mut(),
|
|
primitives,
|
|
x.as_ref(),
|
|
)
|
|
)
|
|
.ok_or_else(|| "return type annotation needed".to_string())??
|
|
} else {
|
|
// TODO: self type, how
|
|
unimplemented!()
|
|
};
|
|
|
|
// handle fields
|
|
if method_name == "__init__" {
|
|
for body in method_body_ast {
|
|
match &body.node {
|
|
ast::StmtKind::AnnAssign {
|
|
target,
|
|
annotation,
|
|
..
|
|
} if {
|
|
if let ast::ExprKind::Attribute {
|
|
value,
|
|
attr,
|
|
..
|
|
} = &target.node {
|
|
if let ast::ExprKind::Name {id, ..} = &value.node {
|
|
id == "self"
|
|
} else { false }
|
|
} else { false }
|
|
} => {
|
|
// TODO: record this field with its type
|
|
},
|
|
|
|
// TODO: exclude those without type annotation
|
|
ast::StmtKind::Assign {
|
|
targets,
|
|
..
|
|
} if {
|
|
if let ast::ExprKind::Attribute {
|
|
value,
|
|
attr,
|
|
..
|
|
} = &targets[0].node {
|
|
if let ast::ExprKind::Name {id, ..} = &value.node {
|
|
id == "self"
|
|
} else { false }
|
|
} else { false }
|
|
} => {
|
|
unimplemented!()
|
|
},
|
|
|
|
// do nothing
|
|
_ => { }
|
|
}
|
|
}
|
|
}
|
|
|
|
let all_tys_ok = {
|
|
let ret_ty_iter = vec![ret_ty];
|
|
let ret_ty_iter = ret_ty_iter.iter();
|
|
let mut all_tys = chain!(arg_tys.iter(), ret_ty_iter);
|
|
all_tys.all(|x| {
|
|
let type_enum = unifier.get_ty(*x);
|
|
match type_enum.as_ref() {
|
|
TypeEnum::TObj { obj_id, .. } => {
|
|
!to_be_analyzed_class.contains(obj_id)
|
|
}
|
|
TypeEnum::TVirtual { ty } => {
|
|
if let TypeEnum::TObj { obj_id, .. } =
|
|
unifier.get_ty(*ty).as_ref()
|
|
{
|
|
!to_be_analyzed_class.contains(obj_id)
|
|
} else {
|
|
unreachable!()
|
|
}
|
|
}
|
|
TypeEnum::TVar { .. } => true,
|
|
_ => unreachable!(),
|
|
}
|
|
})
|
|
};
|
|
|
|
if all_tys_ok {
|
|
// TODO: put related value to the `class_methods_parsing_result`
|
|
unimplemented!()
|
|
} else {
|
|
to_be_analyzed_class.push(DefinitionId(class_ind));
|
|
// TODO: go to the next WHILE loop
|
|
unimplemented!()
|
|
}
|
|
} else {
|
|
// what should we do with `class A: a = 3`?
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// TODO: now it should be confirmed that every
|
|
// methods and fields of the class can be correctly typed, put the results
|
|
// into the actual def_list and the unifier
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn analyze_top_level_inheritance(&mut self) -> Result<(), String> {
|
|
unimplemented!()
|
|
}
|
|
|
|
fn analyze_top_level_function(&mut self) -> Result<(), String> {
|
|
unimplemented!()
|
|
}
|
|
|
|
fn analyze_top_level_field_instantiation(&mut self) -> Result<(), String> {
|
|
unimplemented!()
|
|
}
|
|
}
|