forked from M-Labs/nac3
1119 lines
50 KiB
Rust
1119 lines
50 KiB
Rust
use std::{borrow::BorrowMut, collections::{HashMap, HashSet}, iter::FromIterator, ops::{Deref, DerefMut}, sync::Arc};
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use super::typecheck::type_inferencer::PrimitiveStore;
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use super::typecheck::typedef::{FunSignature, FuncArg, SharedUnifier, Type, TypeEnum, Unifier};
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use crate::{
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symbol_resolver::SymbolResolver,
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typecheck::{type_inferencer::CodeLocation, typedef::CallId},
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};
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use itertools::Itertools;
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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, Hash, Debug)]
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pub struct DefinitionId(pub usize);
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mod type_annotation;
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use type_annotation::*;
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mod helper;
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#[cfg(test)]
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mod test;
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#[derive(Clone, Debug)]
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pub struct FunInstance {
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pub body: Vec<Stmt<Option<Type>>>,
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pub calls: HashMap<CodeLocation, CallId>,
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pub subst: HashMap<u32, Type>,
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pub unifier_id: usize,
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}
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#[derive(Debug)]
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pub enum TopLevelDef {
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Class {
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// name for error messages and symbols
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name: String,
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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<TypeAnnotation>,
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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<Box<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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// instantiated type variable IDs
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var_id: Vec<u32>,
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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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/// rigid type variables that would be substituted when the function is instantiated.
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instance_to_stmt: HashMap<String, FunInstance>,
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// symbol resolver of the module defined the class
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resolver: Option<Arc<Mutex<Box<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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pub struct TopLevelContext {
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pub definitions: Arc<RwLock<Vec<Arc<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_ast_list: Vec<(Arc<RwLock<TopLevelDef>>, 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_ty: PrimitiveStore,
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// keyword list to prevent same user-defined name
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pub keyword_list: HashSet<String>,
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// to prevent duplicate definition
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pub defined_class_name: HashSet<String>,
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pub defined_class_method_name: HashSet<String>,
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pub defined_function_name: HashSet<String>,
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}
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impl Default for TopLevelComposer {
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fn default() -> Self {
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Self::new()
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}
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}
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impl TopLevelComposer {
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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() -> Self {
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let primitives = Self::make_primitives();
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TopLevelComposer {
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definition_ast_list: Default::default(),
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primitives_ty: primitives.0,
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unifier: primitives.1,
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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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keyword_list: HashSet::from_iter(vec![
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"Generic".into(),
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"virtual".into(),
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"list".into(),
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"tuple".into(),
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"int32".into(),
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"int64".into(),
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"float".into(),
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"bool".into(),
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"none".into(),
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"None".into(),
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]),
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defined_class_method_name: Default::default(),
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defined_class_name: Default::default(),
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defined_function_name: Default::default(),
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}
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}
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pub fn make_top_level_context(self) -> TopLevelContext {
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TopLevelContext {
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definitions: RwLock::new(
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self.definition_ast_list.into_iter().map(|(x, ..)| x).collect_vec(),
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)
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.into(),
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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 extract_def_list(&self) -> Vec<Arc<RwLock<TopLevelDef>>> {
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self.definition_ast_list.iter().map(|(def, ..)| def.clone()).collect_vec()
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}
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/// register, just remeber the names of top level classes/function
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/// and check duplicate class/method/function definition
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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<Box<dyn SymbolResolver + Send + Sync>>>>,
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) -> Result<(String, DefinitionId), String> {
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let defined_class_name = &mut self.defined_class_name;
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let defined_class_method_name = &mut self.defined_class_method_name;
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let defined_function_name = &mut self.defined_function_name;
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match &ast.node {
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ast::StmtKind::ClassDef { name, body, .. } => {
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if self.keyword_list.contains(name) {
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return Err("cannot use keyword as a class name".into());
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}
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if !defined_class_name.insert(name.clone()) {
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return Err("duplicate definition of class".into());
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}
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let class_name = name.to_string();
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let class_def_id = self.definition_ast_list.len();
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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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let mut class_def_ast = (
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Arc::new(RwLock::new(Self::make_top_level_class_def(
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class_def_id,
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resolver.clone(),
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name,
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))),
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None,
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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
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let mut class_method_name_def_ids: Vec<(
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// the simple method name without class name
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String,
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// in this top level def, method name is prefixed with the class name
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Arc<RwLock<TopLevelDef>>,
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DefinitionId,
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Type,
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)> = Vec::new();
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// we do not push anything to the def list, so we keep track of the index
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// and then push in the correct order after the for loop
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let mut class_method_index_offset = 0;
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let mut has_init = false;
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for b in body {
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if let ast::StmtKind::FunctionDef { name: method_name, .. } = &b.node {
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if self.keyword_list.contains(name) {
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return Err("cannot use keyword as a method name".into());
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}
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let global_class_method_name =
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Self::make_class_method_name(class_name.clone(), method_name);
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if !defined_class_method_name.insert(global_class_method_name.clone()) {
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return Err("duplicate class method definition".into());
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}
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if method_name == "__init__" {
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has_init = true;
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}
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let method_def_id = self.definition_ast_list.len() + {
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// plus 1 here since we already have the class def
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class_method_index_offset += 1;
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class_method_index_offset
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};
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// dummy method define here
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let dummy_method_type = self.unifier.get_fresh_var();
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class_method_name_def_ids.push((
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method_name.clone(),
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RwLock::new(Self::make_top_level_function_def(
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global_class_method_name,
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// later unify with parsed type
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dummy_method_type.0,
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resolver.clone(),
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))
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.into(),
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DefinitionId(method_def_id),
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dummy_method_type.0,
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));
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} else {
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// do nothing
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continue;
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}
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}
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if !has_init {
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return Err("class def must have __init__ method defined".into());
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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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class_def_ast.1 = Some(ast);
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// get the methods into the top level class_def
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for (name, _, id, ty) in &class_method_name_def_ids {
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let mut class_def = class_def_ast.0.write();
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if let TopLevelDef::Class { methods, .. } = class_def.deref_mut() {
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methods.push((name.clone(), *ty, *id))
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} else {
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unreachable!()
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}
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}
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// now class_def_ast and class_method_def_ast_ids are ok, put them into actual def list in correct order
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self.definition_ast_list.push(class_def_ast);
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for (_, def, ..) in class_method_name_def_ids {
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self.definition_ast_list.push((def, None));
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}
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// put the constructor into the def_list
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self.definition_ast_list.push((
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RwLock::new(TopLevelDef::Initializer { class_id: DefinitionId(class_def_id) })
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.into(),
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None,
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));
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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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if self.keyword_list.contains(name) {
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return Err("cannot use keyword as a top level function name".into());
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}
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let fun_name = name.to_string();
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if !defined_function_name.insert(name.to_string()) {
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return Err("duplicate top level function define".into());
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}
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// add to the definition list
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self.definition_ast_list.push((
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RwLock::new(Self::make_top_level_function_def(
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name.into(),
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// dummy here, unify with correct type later
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self.unifier.get_fresh_var().0,
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resolver,
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))
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.into(),
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Some(ast),
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));
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// return
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Ok((fun_name, DefinitionId(self.definition_ast_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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pub fn start_analysis(&mut self) -> Result<(), String> {
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self.analyze_top_level_class_type_var()?;
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self.analyze_top_level_class_bases()?;
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self.analyze_top_level_class_fields_methods()?;
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self.analyze_top_level_function()?;
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Ok(())
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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 def_list = &self.definition_ast_list;
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let temp_def_list = self.extract_def_list();
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let unifier = self.unifier.borrow_mut();
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let primitives_store = &self.primitives_ty;
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for (class_def, class_ast) in def_list {
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// only deal with class def here
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let mut class_def = class_def.write();
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let (class_bases_ast, class_def_type_vars, class_resolver) = {
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if let TopLevelDef::Class { type_vars, resolver, .. } = class_def.deref_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 class_resolver = class_resolver.as_ref().unwrap();
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let class_resolver = class_resolver.deref();
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let mut is_generic = false;
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for b in class_bases_ast {
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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!(
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&value.node,
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ast::ExprKind::Name { id, .. } if id == "Generic"
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)
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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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let type_var_list: Vec<&ast::Expr<()>>;
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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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type_var_list = elts.iter().collect_vec();
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// `class A(Generic[T])`
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} else {
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type_var_list = vec![slice.deref()];
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}
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// parse the type vars
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let type_vars = type_var_list
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.into_iter()
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.map(|e| {
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class_resolver.lock().parse_type_annotation(
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&temp_def_list,
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unifier,
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primitives_store,
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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 all_unique_type_var = {
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let mut occured_type_var_id: HashSet<u32> = HashSet::new();
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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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};
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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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}
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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.
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/// now that the type vars of all classes are done, handle base classes and
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/// put Self class into the ancestors list. We only allow single inheritance
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fn analyze_top_level_class_bases(&mut self) -> Result<(), String> {
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let temp_def_list = self.extract_def_list();
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let unifier = self.unifier.borrow_mut();
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// first, only push direct parent into the list
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for (class_def, class_ast) in self.definition_ast_list.iter_mut() {
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let mut class_def = class_def.write();
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let (class_bases, class_ancestors, class_resolver) = {
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if let TopLevelDef::Class { ancestors, resolver, .. } = class_def.deref_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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let class_resolver = class_resolver.as_ref().unwrap();
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let class_resolver = class_resolver.deref();
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let mut has_base = false;
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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 matches!(
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&b.node,
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ast::ExprKind::Subscript { value, .. }
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if matches!(
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&value.node,
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ast::ExprKind::Name { id, .. } if id == "Generic"
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)
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) {
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continue;
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}
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|
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if has_base {
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return Err("a class def can only have at most one base class \
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declaration and one generic declaration"
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.into());
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}
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has_base = true;
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// the function parse_ast_to make sure that no type var occured in
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// bast_ty if it is a CustomClassKind
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let base_ty = parse_ast_to_type_annotation_kinds(
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class_resolver,
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&temp_def_list,
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unifier,
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&self.primitives_ty,
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b,
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)?;
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if let TypeAnnotation::CustomClassKind { .. } = &base_ty {
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class_ancestors.push(base_ty);
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} else {
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return Err("class base declaration can only be custom class".into());
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}
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}
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}
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|
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// second, get all ancestors
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let mut ancestors_store: HashMap<DefinitionId, Vec<TypeAnnotation>> = Default::default();
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for (class_def, _) in self.definition_ast_list.iter_mut() {
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let mut class_def = class_def.write();
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let (class_ancestors, class_id) = {
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if let TopLevelDef::Class { ancestors, object_id, .. } = class_def.deref_mut() {
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(ancestors, *object_id)
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} else {
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continue;
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}
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};
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ancestors_store.insert(
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class_id,
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// if class has direct parents, get all ancestors of its parents. Else just empty
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if class_ancestors.is_empty() {
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vec![]
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} else {
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Self::get_all_ancestors_helper(&class_ancestors[0], temp_def_list.as_slice())?
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},
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);
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}
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|
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// insert the ancestors to the def list
|
|
for (class_def, _) in self.definition_ast_list.iter_mut() {
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let mut class_def = class_def.write();
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let (class_ancestors, class_id, class_type_vars) = {
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if let TopLevelDef::Class { ancestors, object_id, type_vars, .. } = class_def.deref_mut() {
|
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(ancestors, *object_id, type_vars)
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} else {
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continue;
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}
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};
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let ans = ancestors_store.get_mut(&class_id).unwrap();
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class_ancestors.append(ans);
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|
|
|
// insert self type annotation to the front of the vector to maintain the order
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|
class_ancestors
|
|
.insert(0, make_self_type_annotation(class_type_vars.as_slice(), class_id));
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// step 3, class fields and methods
|
|
fn analyze_top_level_class_fields_methods(&mut self) -> Result<(), String> {
|
|
let temp_def_list = self.extract_def_list();
|
|
let primitives = &self.primitives_ty;
|
|
let def_ast_list = &self.definition_ast_list;
|
|
let unifier = self.unifier.borrow_mut();
|
|
|
|
let mut type_var_to_concrete_def: HashMap<Type, TypeAnnotation> = HashMap::new();
|
|
|
|
for (class_def, class_ast) in def_ast_list {
|
|
if matches!(&*class_def.read(), TopLevelDef::Class { .. }) {
|
|
Self::analyze_single_class_methods_fields(
|
|
class_def.clone(),
|
|
&class_ast.as_ref().unwrap().node,
|
|
&temp_def_list,
|
|
unifier,
|
|
primitives,
|
|
&mut type_var_to_concrete_def,
|
|
&self.keyword_list,
|
|
)?
|
|
}
|
|
}
|
|
|
|
// handle the inheritanced methods and fields
|
|
let mut current_ancestor_depth: usize = 2;
|
|
loop {
|
|
let mut finished = true;
|
|
|
|
for (class_def, _) in def_ast_list {
|
|
let mut class_def = class_def.write();
|
|
if let TopLevelDef::Class { ancestors, .. } = class_def.deref() {
|
|
// if the length of the ancestor is equal to the current depth
|
|
// it means that all the ancestors of the class is handled
|
|
if ancestors.len() == current_ancestor_depth {
|
|
finished = false;
|
|
Self::analyze_single_class_ancestors(
|
|
class_def.deref_mut(),
|
|
&temp_def_list,
|
|
unifier,
|
|
primitives,
|
|
&mut type_var_to_concrete_def,
|
|
)?;
|
|
}
|
|
}
|
|
}
|
|
|
|
if finished {
|
|
break;
|
|
} else {
|
|
current_ancestor_depth += 1;
|
|
}
|
|
|
|
if current_ancestor_depth > def_ast_list.len() + 1 {
|
|
unreachable!("cannot be longer than the whole top level def list")
|
|
}
|
|
}
|
|
|
|
// unification of previously assigned typevar
|
|
for (ty, def) in type_var_to_concrete_def {
|
|
let target_ty =
|
|
get_type_from_type_annotation_kinds(&temp_def_list, unifier, primitives, &def)?;
|
|
unifier.unify(ty, target_ty)?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// step 4, after class methods are done, top level functions have nothing unknown
|
|
fn analyze_top_level_function(&mut self) -> Result<(), String> {
|
|
let def_list = &self.definition_ast_list;
|
|
let keyword_list = &self.keyword_list;
|
|
let temp_def_list = self.extract_def_list();
|
|
let unifier = self.unifier.borrow_mut();
|
|
let primitives_store = &self.primitives_ty;
|
|
|
|
for (function_def, function_ast) in def_list {
|
|
let function_def = function_def.read();
|
|
let function_def = function_def.deref();
|
|
let function_ast = if let Some(function_ast) = function_ast {
|
|
function_ast
|
|
} else {
|
|
// no ast, class method, continue
|
|
continue;
|
|
};
|
|
|
|
if let TopLevelDef::Function { signature: dummy_ty, resolver, .. } = function_def {
|
|
if let ast::StmtKind::FunctionDef { args, returns, .. } = &function_ast.node {
|
|
let resolver = resolver.as_ref();
|
|
let resolver = resolver.unwrap();
|
|
let resolver = resolver.deref();
|
|
|
|
let mut function_var_map: HashMap<u32, Type> = HashMap::new();
|
|
let arg_types = {
|
|
// make sure no duplicate parameter
|
|
let mut defined_paramter_name: HashSet<String> = HashSet::new();
|
|
let have_unique_fuction_parameter_name = args.args.iter().all(|x| {
|
|
defined_paramter_name.insert(x.node.arg.clone())
|
|
&& !keyword_list.contains(&x.node.arg)
|
|
&& "self" != x.node.arg
|
|
});
|
|
if !have_unique_fuction_parameter_name {
|
|
return Err("top level function must have unique parameter names \
|
|
and names thould not be the same as the keywords"
|
|
.into());
|
|
}
|
|
|
|
args.args
|
|
.iter()
|
|
.map(|x| -> Result<FuncArg, String> {
|
|
let annotation = x
|
|
.node
|
|
.annotation
|
|
.as_ref()
|
|
.ok_or_else(|| {
|
|
"function parameter type annotation needed".to_string()
|
|
})?
|
|
.as_ref();
|
|
|
|
let type_annotation = parse_ast_to_type_annotation_kinds(
|
|
resolver,
|
|
temp_def_list.as_slice(),
|
|
unifier,
|
|
primitives_store,
|
|
annotation,
|
|
)?;
|
|
|
|
let type_vars_within =
|
|
get_type_var_contained_in_type_annotation(&type_annotation)
|
|
.into_iter()
|
|
.map(|x| -> Result<(u32, Type), String> {
|
|
if let TypeAnnotation::TypeVarKind(ty) = x {
|
|
Ok((Self::get_var_id(ty, unifier)?, ty))
|
|
} else {
|
|
unreachable!("must be type var annotation kind")
|
|
}
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
for (id, ty) in type_vars_within {
|
|
if let Some(prev_ty) = function_var_map.insert(id, ty) {
|
|
// if already have the type inserted, make sure they are the same thing
|
|
assert_eq!(prev_ty, ty);
|
|
}
|
|
}
|
|
|
|
let ty = get_type_from_type_annotation_kinds(
|
|
temp_def_list.as_ref(),
|
|
unifier,
|
|
primitives_store,
|
|
&type_annotation,
|
|
)?;
|
|
|
|
Ok(FuncArg {
|
|
name: x.node.arg.clone(),
|
|
ty,
|
|
default_value: Default::default(),
|
|
})
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()?
|
|
};
|
|
|
|
let return_ty = {
|
|
if let Some(returns) = returns {
|
|
let return_ty_annotation = {
|
|
let return_annotation = returns.as_ref();
|
|
parse_ast_to_type_annotation_kinds(
|
|
resolver,
|
|
&temp_def_list,
|
|
unifier,
|
|
primitives_store,
|
|
return_annotation,
|
|
)?
|
|
};
|
|
|
|
let type_vars_within =
|
|
get_type_var_contained_in_type_annotation(&return_ty_annotation)
|
|
.into_iter()
|
|
.map(|x| -> Result<(u32, Type), String> {
|
|
if let TypeAnnotation::TypeVarKind(ty) = x {
|
|
Ok((Self::get_var_id(ty, unifier)?, ty))
|
|
} else {
|
|
unreachable!("must be type var here")
|
|
}
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()?;
|
|
for (id, ty) in type_vars_within {
|
|
if let Some(prev_ty) = function_var_map.insert(id, ty) {
|
|
// if already have the type inserted, make sure they are the same thing
|
|
assert_eq!(prev_ty, ty);
|
|
}
|
|
}
|
|
|
|
get_type_from_type_annotation_kinds(
|
|
&temp_def_list,
|
|
unifier,
|
|
primitives_store,
|
|
&return_ty_annotation,
|
|
)?
|
|
} else {
|
|
primitives_store.none
|
|
}
|
|
};
|
|
let function_ty = unifier.add_ty(TypeEnum::TFunc(
|
|
FunSignature { args: arg_types, ret: return_ty, vars: function_var_map }
|
|
.into(),
|
|
));
|
|
unifier.unify(*dummy_ty, function_ty)?;
|
|
} else {
|
|
unreachable!("must be both function");
|
|
}
|
|
} else {
|
|
// not top level function def, skip
|
|
continue;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn analyze_single_class_methods_fields(
|
|
class_def: Arc<RwLock<TopLevelDef>>,
|
|
class_ast: &ast::StmtKind<()>,
|
|
temp_def_list: &[Arc<RwLock<TopLevelDef>>],
|
|
unifier: &mut Unifier,
|
|
primitives: &PrimitiveStore,
|
|
type_var_to_concrete_def: &mut HashMap<Type, TypeAnnotation>,
|
|
keyword_list: &HashSet<String>,
|
|
) -> Result<(), String> {
|
|
let mut class_def = class_def.write();
|
|
let (
|
|
class_id,
|
|
_class_name,
|
|
_class_bases_ast,
|
|
class_body_ast,
|
|
_class_ancestor_def,
|
|
class_fields_def,
|
|
class_methods_def,
|
|
class_type_vars_def,
|
|
class_resolver,
|
|
) = if let TopLevelDef::Class {
|
|
object_id,
|
|
ancestors,
|
|
fields,
|
|
methods,
|
|
resolver,
|
|
type_vars,
|
|
..
|
|
} = class_def.deref_mut()
|
|
{
|
|
if let ast::StmtKind::ClassDef { name, bases, body, .. } = &class_ast {
|
|
(
|
|
*object_id,
|
|
name.clone(),
|
|
bases,
|
|
body,
|
|
ancestors,
|
|
fields,
|
|
methods,
|
|
type_vars,
|
|
resolver,
|
|
)
|
|
} else {
|
|
unreachable!("here must be class def ast");
|
|
}
|
|
} else {
|
|
unreachable!("here must be class def ast");
|
|
};
|
|
let class_resolver = class_resolver.as_ref().unwrap();
|
|
let class_resolver = class_resolver.as_ref();
|
|
|
|
for b in class_body_ast {
|
|
if let ast::StmtKind::FunctionDef { args, returns, name, body, .. } = &b.node {
|
|
let (method_dummy_ty, ..) =
|
|
Self::get_class_method_def_info(class_methods_def, name)?;
|
|
|
|
// the method var map can surely include the class's generic parameters
|
|
let mut method_var_map: HashMap<u32, Type> = class_type_vars_def
|
|
.iter()
|
|
.map(|ty| {
|
|
if let TypeEnum::TVar { id, .. } = unifier.get_ty(*ty).as_ref() {
|
|
(*id, *ty)
|
|
} else {
|
|
unreachable!("must be type var here")
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
let arg_types: Vec<FuncArg> = {
|
|
// check method parameters cannot have same name
|
|
let mut defined_paramter_name: HashSet<String> = HashSet::new();
|
|
let have_unique_fuction_parameter_name = args.args.iter().all(|x| {
|
|
defined_paramter_name.insert(x.node.arg.clone())
|
|
&& !keyword_list.contains(&x.node.arg)
|
|
});
|
|
if !have_unique_fuction_parameter_name {
|
|
return Err("class method must have unique parameter names \
|
|
and names thould not be the same as the keywords"
|
|
.into());
|
|
}
|
|
|
|
let mut result = Vec::new();
|
|
for x in &args.args {
|
|
let name = x.node.arg.clone();
|
|
if name != "self" {
|
|
let type_ann = {
|
|
let annotation_expr = x
|
|
.node
|
|
.annotation
|
|
.as_ref()
|
|
.ok_or_else(|| "type annotation needed".to_string())?
|
|
.as_ref();
|
|
parse_ast_to_type_annotation_kinds(
|
|
class_resolver,
|
|
temp_def_list,
|
|
unifier,
|
|
primitives,
|
|
annotation_expr,
|
|
)?
|
|
};
|
|
|
|
// find type vars within this method parameter type annotation
|
|
let type_vars_within =
|
|
get_type_var_contained_in_type_annotation(&type_ann);
|
|
// handle the class type var and the method type var
|
|
for type_var_within in type_vars_within {
|
|
if let TypeAnnotation::TypeVarKind(ty) = type_var_within {
|
|
let id = Self::get_var_id(ty, unifier)?;
|
|
if let Some(prev_ty) = method_var_map.insert(id, ty) {
|
|
// if already in the list, make sure they are the same?
|
|
assert_eq!(prev_ty, ty);
|
|
}
|
|
} else {
|
|
unreachable!("must be type var annotation");
|
|
}
|
|
}
|
|
|
|
// finish handling type vars
|
|
let dummy_func_arg = FuncArg {
|
|
name,
|
|
ty: unifier.get_fresh_var().0,
|
|
// TODO: symbol default value?
|
|
default_value: None,
|
|
};
|
|
// push the dummy type and the type annotation
|
|
// into the list for later unification
|
|
type_var_to_concrete_def.insert(dummy_func_arg.ty, type_ann.clone());
|
|
result.push(dummy_func_arg)
|
|
} else {
|
|
// if the parameter name is self
|
|
// python does not seem to enforce the name
|
|
// representing the self class object to be
|
|
// `self`??, but we do it here
|
|
let dummy_func_arg = FuncArg {
|
|
name: "self".into(),
|
|
ty: unifier.get_fresh_var().0,
|
|
default_value: None,
|
|
};
|
|
type_var_to_concrete_def.insert(
|
|
dummy_func_arg.ty,
|
|
make_self_type_annotation(class_type_vars_def.as_slice(), class_id),
|
|
);
|
|
result.push(dummy_func_arg);
|
|
}
|
|
}
|
|
result
|
|
};
|
|
|
|
let ret_type = {
|
|
if name != "__init__" {
|
|
if let Some(result) = returns {
|
|
let result = result.as_ref();
|
|
let annotation = parse_ast_to_type_annotation_kinds(
|
|
class_resolver,
|
|
temp_def_list,
|
|
unifier,
|
|
primitives,
|
|
result,
|
|
)?;
|
|
|
|
// find type vars within this return type annotation
|
|
let type_vars_within =
|
|
get_type_var_contained_in_type_annotation(&annotation);
|
|
// handle the class type var and the method type var
|
|
for type_var_within in type_vars_within {
|
|
if let TypeAnnotation::TypeVarKind(ty) = type_var_within {
|
|
let id = Self::get_var_id(ty, unifier)?;
|
|
if let Some(prev_ty) = method_var_map.insert(id, ty) {
|
|
// if already in the list, make sure they are the same?
|
|
assert_eq!(prev_ty, ty);
|
|
}
|
|
} else {
|
|
unreachable!("must be type var annotation");
|
|
}
|
|
}
|
|
|
|
let dummy_return_type = unifier.get_fresh_var().0;
|
|
type_var_to_concrete_def.insert(dummy_return_type, annotation.clone());
|
|
dummy_return_type
|
|
} else {
|
|
// if do not have return annotation, return none
|
|
// for uniform handling, still use type annoatation
|
|
let dummy_return_type = unifier.get_fresh_var().0;
|
|
type_var_to_concrete_def.insert(
|
|
dummy_return_type,
|
|
TypeAnnotation::PrimitiveKind(primitives.none),
|
|
);
|
|
dummy_return_type
|
|
}
|
|
} else {
|
|
// if is the "__init__" function, the return type is self
|
|
let dummy_return_type = unifier.get_fresh_var().0;
|
|
type_var_to_concrete_def.insert(
|
|
dummy_return_type,
|
|
make_self_type_annotation(class_type_vars_def.as_slice(), class_id),
|
|
);
|
|
dummy_return_type
|
|
}
|
|
};
|
|
|
|
let method_type = unifier.add_ty(TypeEnum::TFunc(
|
|
FunSignature { args: arg_types, ret: ret_type, vars: method_var_map }.into(),
|
|
));
|
|
// NOTE: unify now since function type is not in type annotation define
|
|
// which is fine since type within method_type will be subst later
|
|
unifier.unify(method_dummy_ty, method_type)?;
|
|
|
|
// class fields
|
|
if name == "__init__" {
|
|
for b in body {
|
|
let mut defined_fields: HashSet<String> = HashSet::new();
|
|
// TODO: check the type of value, field instantiation check?
|
|
if let ast::StmtKind::AnnAssign { annotation, target, value: _, .. } =
|
|
&b.node
|
|
{
|
|
if let ast::ExprKind::Attribute { value, attr, .. } = &target.node {
|
|
if matches!(&value.node, ast::ExprKind::Name { id, .. } if id == "self")
|
|
{
|
|
if defined_fields.insert(attr.to_string()) {
|
|
let dummy_field_type = unifier.get_fresh_var().0;
|
|
class_fields_def.push((attr.to_string(), dummy_field_type));
|
|
|
|
let annotation = parse_ast_to_type_annotation_kinds(
|
|
class_resolver,
|
|
&temp_def_list,
|
|
unifier,
|
|
primitives,
|
|
annotation.as_ref(),
|
|
)?;
|
|
|
|
// find type vars within this return type annotation
|
|
let type_vars_within =
|
|
get_type_var_contained_in_type_annotation(&annotation);
|
|
// handle the class type var and the method type var
|
|
for type_var_within in type_vars_within {
|
|
if let TypeAnnotation::TypeVarKind(t) = type_var_within
|
|
{
|
|
if !class_type_vars_def.contains(&t) {
|
|
return Err("class fields can only use type \
|
|
vars declared as class generic type vars"
|
|
.into());
|
|
}
|
|
} else {
|
|
unreachable!("must be type var annotation");
|
|
}
|
|
}
|
|
|
|
type_var_to_concrete_def
|
|
.insert(dummy_field_type, annotation);
|
|
} else {
|
|
return Err("same class fields defined twice".into());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn analyze_single_class_ancestors(
|
|
class_def: &mut TopLevelDef,
|
|
temp_def_list: &[Arc<RwLock<TopLevelDef>>],
|
|
unifier: &mut Unifier,
|
|
_primitives: &PrimitiveStore,
|
|
type_var_to_concrete_def: &mut HashMap<Type, TypeAnnotation>,
|
|
) -> Result<(), String> {
|
|
let (
|
|
_class_id,
|
|
class_ancestor_def,
|
|
class_fields_def,
|
|
class_methods_def,
|
|
_class_type_vars_def,
|
|
_class_resolver,
|
|
) = if let TopLevelDef::Class {
|
|
object_id,
|
|
ancestors,
|
|
fields,
|
|
methods,
|
|
resolver,
|
|
type_vars,
|
|
..
|
|
} = class_def
|
|
{
|
|
(*object_id, ancestors, fields, methods, type_vars, resolver)
|
|
} else {
|
|
unreachable!("here must be class def ast");
|
|
};
|
|
|
|
// since when this function is called, the ancestors of the direct parent
|
|
// are supposed to be already handled, so we only need to deal with the direct parent
|
|
let base = class_ancestor_def.get(1).unwrap();
|
|
if let TypeAnnotation::CustomClassKind { id, params: _ } = base {
|
|
let base = temp_def_list.get(id.0).unwrap();
|
|
let base = base.read();
|
|
if let TopLevelDef::Class { methods, fields, .. } = &*base {
|
|
// handle methods override
|
|
// since we need to maintain the order, create a new list
|
|
let mut new_child_methods: Vec<(String, Type, DefinitionId)> = Vec::new();
|
|
let mut is_override: HashSet<String> = HashSet::new();
|
|
for (anc_method_name, anc_method_ty, anc_method_def_id) in methods {
|
|
// find if there is a method with same name in the child class
|
|
let mut to_be_added =
|
|
(anc_method_name.to_string(), *anc_method_ty, *anc_method_def_id);
|
|
for (class_method_name, class_method_ty, class_method_defid) in
|
|
class_methods_def.iter()
|
|
{
|
|
if class_method_name == anc_method_name {
|
|
// ignore and handle self
|
|
// if is __init__ method, no need to check return type
|
|
let ok = class_method_name == "__init__"
|
|
|| Self::check_overload_function_type(
|
|
*class_method_ty,
|
|
*anc_method_ty,
|
|
unifier,
|
|
type_var_to_concrete_def,
|
|
);
|
|
if !ok {
|
|
return Err("method has same name as ancestors' method, but incompatible type".into());
|
|
}
|
|
// mark it as added
|
|
is_override.insert(class_method_name.to_string());
|
|
to_be_added = (
|
|
class_method_name.to_string(),
|
|
*class_method_ty,
|
|
*class_method_defid,
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
new_child_methods.push(to_be_added);
|
|
}
|
|
// add those that are not overriding method to the new_child_methods
|
|
for (class_method_name, class_method_ty, class_method_defid) in
|
|
class_methods_def.iter()
|
|
{
|
|
if !is_override.contains(class_method_name) {
|
|
new_child_methods.push((
|
|
class_method_name.to_string(),
|
|
*class_method_ty,
|
|
*class_method_defid,
|
|
));
|
|
}
|
|
}
|
|
// use the new_child_methods to replace all the elements in `class_methods_def`
|
|
class_methods_def.drain(..);
|
|
class_methods_def.extend(new_child_methods);
|
|
|
|
// handle class fields
|
|
let mut new_child_fields: Vec<(String, Type)> = Vec::new();
|
|
let mut is_override: HashSet<String> = HashSet::new();
|
|
for (anc_field_name, anc_field_ty) in fields {
|
|
let mut to_be_added = (anc_field_name.to_string(), *anc_field_ty);
|
|
// find if there is a fields with the same name in the child class
|
|
for (class_field_name, class_field_ty) in class_fields_def.iter() {
|
|
if class_field_name == anc_field_name {
|
|
let ok = Self::check_overload_field_type(
|
|
*class_field_ty,
|
|
*anc_field_ty,
|
|
unifier,
|
|
type_var_to_concrete_def,
|
|
);
|
|
if !ok {
|
|
return Err("fields has same name as ancestors' field, but incompatible type".into());
|
|
}
|
|
// mark it as added
|
|
is_override.insert(class_field_name.to_string());
|
|
to_be_added = (class_field_name.to_string(), *class_field_ty);
|
|
break;
|
|
}
|
|
}
|
|
new_child_fields.push(to_be_added);
|
|
}
|
|
for (class_field_name, class_field_ty) in class_fields_def.iter() {
|
|
if !is_override.contains(class_field_name) {
|
|
new_child_fields.push((class_field_name.to_string(), *class_field_ty));
|
|
}
|
|
}
|
|
class_fields_def.drain(..);
|
|
class_fields_def.extend(new_child_fields);
|
|
} else {
|
|
unreachable!("must be top level class def")
|
|
}
|
|
} else {
|
|
unreachable!("must be class type annotation")
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|