nac3/nac3core/src/top_level.rs

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use std::borrow::{Borrow, BorrowMut};
use std::collections::HashSet;
use std::{collections::HashMap, sync::Arc};
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use super::typecheck::type_inferencer::PrimitiveStore;
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use super::typecheck::typedef::{SharedUnifier, Type, TypeEnum, Unifier};
use crate::symbol_resolver::SymbolResolver;
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use crate::typecheck::typedef::{FunSignature, FuncArg};
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use inkwell::context::Context;
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)]
pub struct DefinitionId(pub usize);
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pub enum TopLevelDef {
Class {
// object ID used for TypeEnum
object_id: DefinitionId,
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// type variables bounded to the class.
type_vars: Vec<Type>,
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// class fields
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fields: Vec<(String, Type)>,
// 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.
ancestors: Vec<DefinitionId>,
// symbol resolver of the module defined the class, none if it is built-in type
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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},
Function {
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// prefix for symbol, should be unique globally, and not ending with numbers
name: String,
// function signature.
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signature: Type,
/// Function instance to symbol mapping
/// Key: string representation of type variable values, sorted by variable ID in ascending
/// order, including type variables associated with the class.
/// Value: function symbol name.
instance_to_symbol: HashMap<String, String>,
/// Function instances to annotated AST mapping
/// Key: string representation of type variable values, sorted by variable ID in ascending
/// order, including type variables associated with the class. Excluding rigid type
/// variables.
/// Value: AST annotated with types together with a unification table index. Could contain
/// 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)>,
// symbol resolver of the module defined the class
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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},
Initializer {
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class_id: DefinitionId,
},
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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)>>>,
pub conetexts: Arc<RwLock<Vec<Mutex<Context>>>>,
}
pub struct TopLevelComposer {
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// list of top level definitions, same as top level context
pub definition_list: Arc<RwLock<Vec<RwLock<TopLevelDef>>>>,
// list of top level Type, the index is same as the field `definition_list`
pub ty_list: RwLock<Vec<Type>>,
// list of top level ast, the index is same as the field `definition_list` and `ty_list`
pub ast_list: RwLock<Vec<Option<ast::Stmt<()>>>>,
// start as a primitive unifier, will add more top_level defs inside
pub unifier: RwLock<Unifier>,
// primitive store
pub primitives: PrimitiveStore,
// mangled class method name to def_id
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pub class_method_to_def_id: RwLock<HashMap<String, DefinitionId>>,
}
impl TopLevelComposer {
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pub fn to_top_level_context(&self) -> TopLevelContext {
TopLevelContext {
definitions: self.definition_list.clone(),
// FIXME: all the big unifier or?
unifiers: Default::default(),
conetexts: Default::default(),
}
}
fn name_mangling(mut class_name: String, method_name: &str) -> String {
class_name.push_str(method_name);
class_name
}
pub fn make_primitives() -> (PrimitiveStore, Unifier) {
let mut unifier = Unifier::new();
let int32 = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(0),
fields: HashMap::new().into(),
params: HashMap::new().into(),
});
let int64 = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(1),
fields: HashMap::new().into(),
params: HashMap::new().into(),
});
let float = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(2),
fields: HashMap::new().into(),
params: HashMap::new().into(),
});
let bool = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(3),
fields: HashMap::new().into(),
params: HashMap::new().into(),
});
let none = unifier.add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(4),
fields: HashMap::new().into(),
params: HashMap::new().into(),
});
let primitives = PrimitiveStore { int32, int64, float, bool, none };
crate::typecheck::magic_methods::set_primitives_magic_methods(&primitives, &mut unifier);
(primitives, unifier)
}
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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
pub fn new() -> (Vec<(String, DefinitionId, Type)>, Self) {
let primitives = Self::make_primitives();
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let top_level_def_list = vec![
RwLock::new(Self::make_top_level_class_def(0, None)),
RwLock::new(Self::make_top_level_class_def(1, None)),
RwLock::new(Self::make_top_level_class_def(2, None)),
RwLock::new(Self::make_top_level_class_def(3, None)),
RwLock::new(Self::make_top_level_class_def(4, None)),
];
let ast_list: Vec<Option<ast::Stmt<()>>> = vec![None, None, None, None, None];
let ty_list: Vec<Type> = vec![
primitives.0.int32,
primitives.0.int64,
primitives.0.float,
primitives.0.bool,
primitives.0.none,
];
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let composer = TopLevelComposer {
definition_list: RwLock::new(top_level_def_list).into(),
ty_list: RwLock::new(ty_list),
ast_list: RwLock::new(ast_list),
primitives: primitives.0,
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unifier: primitives.1.into(),
class_method_to_def_id: Default::default(),
};
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(
vec![
("int32".into(), DefinitionId(0), composer.primitives.int32),
("int64".into(), DefinitionId(1), composer.primitives.int64),
("float".into(), DefinitionId(2), composer.primitives.float),
("bool".into(), DefinitionId(3), composer.primitives.bool),
("none".into(), DefinitionId(4), composer.primitives.none),
],
composer,
)
}
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/// already include the definition_id of itself inside the ancestors vector
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pub fn make_top_level_class_def(
index: usize,
resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
) -> TopLevelDef {
TopLevelDef::Class {
object_id: DefinitionId(index),
type_vars: Default::default(),
fields: Default::default(),
methods: Default::default(),
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ancestors: vec![DefinitionId(index)],
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resolver,
}
}
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pub fn make_top_level_function_def(
name: String,
ty: Type,
resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
) -> TopLevelDef {
TopLevelDef::Function {
name,
signature: ty,
instance_to_symbol: Default::default(),
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instance_to_stmt: Default::default(),
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resolver,
}
}
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pub fn register_top_level(
&mut self,
ast: ast::Stmt<()>,
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resolver: Option<Arc<Mutex<dyn SymbolResolver + Send>>>,
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) -> Result<(String, DefinitionId, Type), String> {
match &ast.node {
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ast::StmtKind::ClassDef { name, body, .. } => {
let class_name = name.to_string();
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let (mut def_list, mut ty_list, mut ast_list) =
(self.definition_list.write(), self.ty_list.write(), self.ast_list.write());
// will be deleted after tested
assert_eq!(ty_list.len(), def_list.len());
assert_eq!(def_list.len(), ast_list.len());
let class_def_id = def_list.len();
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// add the class to the unifier
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let ty = self.unifier.write().add_ty(TypeEnum::TObj {
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obj_id: DefinitionId(class_def_id),
fields: Default::default(),
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params: Default::default(),
});
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// add the class to the definition lists
def_list
.push(Self::make_top_level_class_def(class_def_id, resolver.clone()).into());
ty_list.push(ty);
// since later when registering class method, ast will still be used,
// here push None temporarly, later will push the ast
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,
// thus cannot return their definition_id? so we have to manage it ourselves
// by using the field `class_method_to_def_id`
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for b in body {
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if let ast::StmtKind::FunctionDef { name, .. } = &b.node {
let fun_name = Self::name_mangling(class_name.clone(), name);
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let def_id = def_list.len();
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// add to unifier
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let ty = self.unifier.write().add_ty(TypeEnum::TFunc(
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crate::typecheck::typedef::FunSignature {
args: Default::default(),
ret: self.primitives.none,
vars: Default::default(),
},
));
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// add to the definition list
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def_list.push(
Self::make_top_level_function_def(
fun_name.clone(),
ty,
resolver.clone(),
)
.into(),
);
ty_list.push(ty);
// the ast of class method is in the class, push None in to the list here
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.write().insert(fun_name, DefinitionId(def_id));
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// if it is the contructor, special handling is needed. In the above
// handling, we still add __init__ function to the class method
if name == "__init__" {
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// NOTE: how can this later be fetched?
def_list.push(
TopLevelDef::Initializer { class_id: DefinitionId(class_def_id) }
.into(),
);
// arbitarily push one to make sure the index is correct
ty_list.push(self.primitives.none);
ast_list.push(None);
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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
ast_list[class_def_id] = Some(ast);
// return
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Ok((class_name, DefinitionId(class_def_id), ty))
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}
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ast::StmtKind::FunctionDef { name, .. } => {
let fun_name = name.to_string();
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// add to the unifier
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let ty = self.unifier.write().add_ty(TypeEnum::TFunc(
crate::typecheck::typedef::FunSignature {
args: Default::default(),
ret: self.primitives.none,
vars: Default::default(),
},
));
let (mut def_list, mut ty_list, mut ast_list) =
(self.definition_list.write(), self.ty_list.write(), self.ast_list.write());
// add to the definition list
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def_list.push(
Self::make_top_level_function_def(name.into(), self.primitives.none, resolver)
.into(),
);
ty_list.push(ty);
ast_list.push(Some(ast));
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// return
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Ok((fun_name, DefinitionId(def_list.len() - 1), ty))
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}
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_ => Err("only registrations of top level classes/functions are supprted".into()),
}
}
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/// this should be called after all top level classes are registered, and
/// will actually fill in those fields of the previous dummy one
pub fn analyze_top_level(&mut self) -> Result<(), String> {
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let mut def_list = self.definition_list.write();
let ty_list = self.ty_list.read();
let ast_list = self.ast_list.read();
let mut unifier = self.unifier.write();
for (def, ty, ast) in def_list
.iter_mut()
.zip(ty_list.iter())
.zip(ast_list.iter())
.map(|((x, y), z)| (x, y, z))
.collect::<Vec<(&mut RwLock<TopLevelDef>, &Type, &Option<ast::Stmt<()>>)>>()
{
// only analyze those entries with ast, and class_method(whose ast in class def)
match ast {
Some(ast::Located{node: ast::StmtKind::ClassDef {
bases,
body,
name: class_name,
..
}, .. }) => {
// get the mutable reference of the entry in the
// definition list, get the `TopLevelDef`
let (
def_ancestors,
def_fields,
def_methods,
def_type_vars,
resolver,
) = if let TopLevelDef::Class {
object_id: _,
ancestors,
fields,
methods,
type_vars,
resolver: Some(resolver)
} = def.get_mut() {
(ancestors, fields, methods, type_vars, resolver.lock())
} else { unreachable!() };
// try to get mutable reference of the entry in the
// unification table, get the `TypeEnum`
let type_enum = unifier.get_ty(*ty);
let (
enum_params,
enum_fields
) = if let TypeEnum::TObj {
params,
fields,
..
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} = type_enum.borrow() {
(params, fields)
} else { unreachable!() };
// ancestors and typevars associate with the class are analyzed by looking
// into the `bases` ast node
// `Generic` should only occur once, use this flag
let mut generic_occured = false;
// TODO: haven't check this yet
let mut occured_type_var: HashSet<Type> = Default::default();
// TODO: haven't check this yet
let mut occured_base: HashSet<DefinitionId> = Default::default();
for b in bases {
match &b.node {
// analyze typevars bounded to the class,
// only support things like `class A(Generic[T, V])`,
// things like `class A(Generic[T, V, ImportedModule.T])` is not supported
// i.e. only simple names are allowed in the subscript
// should update the TopLevelDef::Class.typevars and the TypeEnum::TObj.params
ast::ExprKind::Subscript {value, slice, ..} if {
// can only be `Generic[...]` and this can only appear once
if let ast::ExprKind::Name { id, .. } = &value.node {
if id == "Generic" {
if !generic_occured {
generic_occured = true;
true
} else {
return Err("Only single Generic[...] or Protocol[...] can be in bases".into())
}
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} else { false }
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} else { false }
} => {
match &slice.node {
// `class Foo(Generic[T, V, P]):` multiple element inside the subscript
ast::ExprKind::Tuple {elts, ..} => {
let tys = elts
.iter()
.map(|x| {resolver.parse_type_annotation(
&self.to_top_level_context(),
unifier.borrow_mut(),
&self.primitives,
x)})
.collect::<Result<Vec<_>, _>>()?;
let ty_var_ids = tys
.iter()
.map(|t| unifier.get_ty(*t))
.collect::<Vec<_>>()
.iter()
.map(|x| {
let x = x.as_ref();
if let TypeEnum::TVar {id, ..} = x {
Ok(*id)
} else {
Err("Expect type variabls here".to_string())
}
})
.collect::<Result<Vec<_>, _>>()?;
// write to TypeEnum
for (id, ty) in ty_var_ids.iter().zip(tys.iter()) {
enum_params.borrow_mut().insert(*id, *ty);
}
// write to TopLevelDef
for ty in tys{
def_type_vars.push(ty)
}
},
// `class Foo(Generic[T]):`, only single element
_ => {
let ty = resolver.parse_type_annotation(
&self.to_top_level_context(),
unifier.borrow_mut(),
&self.primitives,
&slice
)?;
let ty_var_id = if let TypeEnum::TVar { id, .. } = unifier
.get_ty(ty)
.as_ref() { *id } else {
return Err("Expect type variabls here".to_string())
};
// write to TypeEnum
enum_params.borrow_mut().insert(ty_var_id, ty);
// write to TopLevelDef
def_type_vars.push(ty);
},
};
}
// analyze base classes, which is possible in
// other cases, we parse for the base class
_ => {
let ty = resolver.parse_type_annotation(
&self.to_top_level_context(),
unifier.borrow_mut(),
&self.primitives,
b
)?;
let obj_def_id = if let TypeEnum::TObj { obj_id, .. } = unifier
.get_ty(ty)
.as_ref() {
*obj_id
} else {
return Err("Expect concrete classes/types here".into())
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};
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// write to TopLevelDef
def_ancestors.push(obj_def_id);
}
}
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}
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// class method and field are analyzed by
// looking into the class body ast node
// NOTE: should consider parents' method and fields(check re-def and add),
// but we do it later we go over these again after we finish analyze the
// fields/methods as declared in the ast
// method with same name should not occur twice, so use this
let defined_method: HashSet<String> = Default::default();
for stmt in body {
if let ast::StmtKind::FunctionDef {
name,
args,
body,
returns,
..
} = &stmt.node {
// build type enum, need FunSignature {args, vars, ret}
// args. Now only args with no default TODO: other kinds of args
let func_args = args.args
.iter()
.map(|x| -> Result<FuncArg, String> {
Ok(FuncArg {
name: x.node.arg.clone(),
ty: resolver.parse_type_annotation(
&self.to_top_level_context(),
unifier.borrow_mut(),
&self.primitives,
x
.node
.annotation
.as_ref()
.ok_or_else(|| "type annotations required for function parameters".to_string())?
)?,
default_value: None
})
})
.collect::<Result<Vec<FuncArg>, _>>()?;
// vars. find TypeVars used in the argument type annotation
let func_vars = func_args
.iter()
.filter_map(|FuncArg { ty, .. } | {
if let TypeEnum::TVar { id, .. } = unifier.get_ty(*ty).as_ref() {
Some((*id, *ty))
} else { None }
})
.collect::<HashMap<u32, Type>>();
// return type
let func_ret = resolver
.parse_type_annotation(
&self.to_top_level_context(),
unifier.borrow_mut(),
&self.primitives,
returns
.as_ref()
.ok_or_else(|| "return type annotations required here".to_string())?
.as_ref(),
)?;
// build the TypeEnum
let func_ty = TypeEnum::TFunc(FunSignature {
args: func_args,
vars: func_vars,
ret: func_ret
});
// TODO: write to the TypeEnum and Def_list
if name == "__init__" {
// special for constructor, need to look into the fields
// TODO: look into the function body and see
}
} else {
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// do nothing. we do not care about things like this?
// class A:
// a = 3
// b = [2, 3]
}
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}
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},
// top level function definition
Some(ast::Located{node: ast::StmtKind::FunctionDef {
name,
args,
body,
returns,
..
}, .. }) => {
// TODO:
unimplemented!()
}
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// only expect class def and function def ast
_ => return Err("only expect function and class definitions to be submitted here to be analyzed".into())
}
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}
Ok(())
}
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}