M-Labs/nac3
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put parse ast into type annotation into one function

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This commit is contained in:
ychenfo 2021-08-24 17:43:41 +08:00
parent 32773c14e0
commit 01f7a31aae
3 changed files with 109 additions and 182 deletions
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5
nac3core/src/toplevel/mod.rs
View File

@ -3,15 +3,12 @@ use std::ops::{Deref, DerefMut};
use std::{collections::HashMap, collections::HashSet, sync::Arc};
use super::typecheck::type_inferencer::PrimitiveStore;
use super::typecheck::typedef::{SharedUnifier, Type, TypeEnum, Unifier};
use super::typecheck::typedef::{FunSignature, FuncArg, SharedUnifier, Type, TypeEnum, Unifier};
use crate::symbol_resolver::SymbolResolver;
use crate::typecheck::typedef::{FunSignature, FuncArg};
use itertools::{izip, Itertools};
use parking_lot::{Mutex, RwLock};
use rustpython_parser::ast::{self, Stmt};
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
pub struct DefinitionId(pub usize);

279
nac3core/src/toplevel/type_annotation.rs
View File

@ -19,6 +19,7 @@ pub enum TypeAnnotation {
TypeVarKind(u32, Type),
SelfTypeKind(DefinitionId),
}
pub fn parse_ast_to_type_annotation_kinds<T>(
resolver: &dyn SymbolResolver,
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
@ -26,31 +27,111 @@ pub fn parse_ast_to_type_annotation_kinds<T>(
primitives: &PrimitiveStore,
expr: &ast::Expr<T>,
) -> Result<TypeAnnotation, String> {
let results = vec![
parse_ast_to_concrete_primitive_kind(
resolver,
top_level_defs,
unifier,
primitives,
expr,
),
parse_ast_to_concretized_custom_class_kind(
resolver,
top_level_defs,
unifier,
primitives,
expr,
),
parse_ast_to_type_variable_kind(resolver, top_level_defs, unifier, primitives, expr),
parse_ast_to_virtual_kind(resolver, top_level_defs, unifier, primitives, expr),
];
let results = results.iter().filter(|x| x.is_ok()).collect_vec();
if results.len() == 1 {
results[0].clone()
match &expr.node {
ast::ExprKind::Name { id, .. } => match id.as_str() {
"int32" => Ok(TypeAnnotation::PrimitiveKind(primitives.int32)),
"int64" => Ok(TypeAnnotation::PrimitiveKind(primitives.int64)),
"float" => Ok(TypeAnnotation::PrimitiveKind(primitives.float)),
"bool" => Ok(TypeAnnotation::PrimitiveKind(primitives.bool)),
"None" => Ok(TypeAnnotation::PrimitiveKind(primitives.none)),
x => {
if let Some(obj_id) = resolver.get_identifier_def(x) {
let def = top_level_defs[obj_id.0].read();
if let TopLevelDef::Class { .. } = &*def {
Ok(TypeAnnotation::ConcretizedCustomClassKind {
id: obj_id,
params: vec![],
})
} else {
Err("cannot parsed the type annotation without ambiguity".into())
Err("function cannot be used as a type".into())
}
} else if let Some(ty) = resolver.get_symbol_type(unifier, primitives, id) {
if let TypeEnum::TVar { id, meta: TypeVarMeta::Generic, range } =
unifier.get_ty(ty).as_ref()
{
// NOTE: always create a new one here
// and later unify if needed
// but record the var_id of the original type var returned by symbol resolver
let range = range.borrow();
let range = range.as_slice();
Ok(TypeAnnotation::TypeVarKind(
*id,
unifier.get_fresh_var_with_range(range).0,
))
} else {
Err("not a type variable identifier".into())
}
} else {
Err("name cannot be parsed as a type annotation".into())
}
}
},
// TODO: subscript or call
ast::ExprKind::Subscript { value, slice, .. }
if { matches!(&value.node, ast::ExprKind::Name { id, .. } if id == "virtual") } =>
{
let def = parse_ast_to_type_annotation_kinds(
resolver,
top_level_defs,
unifier,
primitives,
slice.as_ref(),
)?;
if !matches!(def, TypeAnnotation::ConcretizedCustomClassKind { .. }) {
unreachable!("must be concretized custom class kind in the virtual")
}
Ok(TypeAnnotation::VirtualKind(def.into()))
}
ast::ExprKind::Subscript { value, slice, .. } => {
if let ast::ExprKind::Name { id, .. } = &value.node {
if vec!["virtual", "Generic"].contains(&id.as_str()) {
return Err("keywords cannot be class name".into());
}
let obj_id = resolver
.get_identifier_def(id)
.ok_or_else(|| "unknown class name".to_string())?;
let def = top_level_defs[obj_id.0].read();
if let TopLevelDef::Class { .. } = &*def {
let param_type_infos = if let ast::ExprKind::Tuple { elts, .. } = &slice.node {
elts.iter()
.map(|v| {
parse_ast_to_type_annotation_kinds(
resolver,
top_level_defs,
unifier,
primitives,
v,
)
})
.collect::<Result<Vec<_>, _>>()?
} else {
vec![parse_ast_to_type_annotation_kinds(
resolver,
top_level_defs,
unifier,
primitives,
slice,
)?]
};
// NOTE: allow type var in class generic application list
Ok(TypeAnnotation::ConcretizedCustomClassKind {
id: obj_id,
params: param_type_infos,
})
} else {
Err("function cannot be used as a type".into())
}
} else {
Err("unsupported expression type for class name".into())
}
}
_ => Err("unsupported expression for type annotation".into()),
}
}
pub fn get_type_from_type_annotation_kinds(
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
@ -154,157 +235,3 @@ pub fn get_type_from_type_annotation_kinds(
}
}
}
fn parse_ast_to_concrete_primitive_kind<T>(
_resolver: &dyn SymbolResolver,
_top_level_defs: &[Arc<RwLock<TopLevelDef>>],
_unifier: &mut Unifier,
primitives: &PrimitiveStore,
expr: &ast::Expr<T>,
) -> Result<TypeAnnotation, String> {
match &expr.node {
ast::ExprKind::Name { id, .. } => match id.as_str() {
"int32" => Ok(TypeAnnotation::PrimitiveKind(primitives.int32)),
"int64" => Ok(TypeAnnotation::PrimitiveKind(primitives.int64)),
"float" => Ok(TypeAnnotation::PrimitiveKind(primitives.float)),
"bool" => Ok(TypeAnnotation::PrimitiveKind(primitives.bool)),
"None" => Ok(TypeAnnotation::PrimitiveKind(primitives.none)),
_ => Err("not primitive".into()),
},
_ => Err("not primitive".into()),
}
}
pub fn parse_ast_to_concretized_custom_class_kind<T>(
resolver: &dyn SymbolResolver,
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
primitives: &PrimitiveStore,
expr: &ast::Expr<T>,
) -> Result<TypeAnnotation, String> {
match &expr.node {
ast::ExprKind::Name { id, .. } => match id.as_str() {
"int32" | "int64" | "float" | "bool" | "None" => {
Err("expect custom class instead of primitives here".into())
}
x => {
let obj_id = resolver
.get_identifier_def(x)
.ok_or_else(|| "unknown class name".to_string())?;
let def = top_level_defs[obj_id.0].read();
if let TopLevelDef::Class { .. } = &*def {
Ok(TypeAnnotation::ConcretizedCustomClassKind {
id: obj_id,
params: vec![],
})
} else {
Err("function cannot be used as a type".into())
}
}
},
ast::ExprKind::Subscript { value, slice, .. } => {
if let ast::ExprKind::Name { id, .. } = &value.node {
if vec!["virtual", "Generic"].contains(&id.as_str()) {
return Err("keywords cannot be class name".into());
}
let obj_id = resolver
.get_identifier_def(id)
.ok_or_else(|| "unknown class name".to_string())?;
let def = top_level_defs[obj_id.0].read();
if let TopLevelDef::Class { .. } = &*def {
let param_type_infos =
if let ast::ExprKind::Tuple { elts, .. } = &slice.node {
elts.iter()
.map(|v| {
parse_ast_to_type_annotation_kinds(
resolver,
top_level_defs,
unifier,
primitives,
v,
)
})
.collect::<Result<Vec<_>, _>>()?
} else {
vec![parse_ast_to_type_annotation_kinds(
resolver,
top_level_defs,
unifier,
primitives,
slice,
)?]
};
// TODO: allow type var in class generic application list
// if param_type_infos
// .iter()
// .any(|x| matches!(x, TypeAnnotation::TypeVarKind(..)))
// {
// return Err(
// "cannot apply type variable to class generic parameters".into()
// );
// }
Ok(TypeAnnotation::ConcretizedCustomClassKind {
id: obj_id,
params: param_type_infos,
})
} else {
Err("function cannot be used as a type".into())
}
} else {
Err("unsupported expression type for class name".into())
}
}
_ => Err("unsupported expression type for concretized class".into()),
}
}
pub fn parse_ast_to_virtual_kind<T>(
resolver: &dyn SymbolResolver,
top_level_defs: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
primitives: &PrimitiveStore,
expr: &ast::Expr<T>,
) -> Result<TypeAnnotation, String> {
match &expr.node {
ast::ExprKind::Subscript { value, slice, .. }
if { matches!(&value.node, ast::ExprKind::Name { id, .. } if id == "virtual") } =>
{
let def = parse_ast_to_concretized_custom_class_kind(
resolver,
top_level_defs,
unifier,
primitives,
slice.as_ref(),
)?;
if !matches!(def, TypeAnnotation::ConcretizedCustomClassKind { .. }) {
unreachable!("must be concretized custom class kind in the virtual")
}
Ok(TypeAnnotation::VirtualKind(def.into()))
}
_ => Err("virtual type annotation must be like `virtual[ .. ]`".into()),
}
}
pub fn parse_ast_to_type_variable_kind<T>(
resolver: &dyn SymbolResolver,
_top_level_defs: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
primitives: &PrimitiveStore,
expr: &ast::Expr<T>,
) -> Result<TypeAnnotation, String> {
if let ast::ExprKind::Name { id, .. } = &expr.node {
let ty = resolver
.get_symbol_type(unifier, primitives, id)
.ok_or_else(|| "unknown type variable name".to_string())?;
if let TypeEnum::TVar { id, meta: TypeVarMeta::Generic, range } =
unifier.get_ty(ty).as_ref()
{
// NOTE: always create a new one here
// and later unify if needed
// but record the var_id of the original type var returned by symbol resolver
let range = range.borrow();
let range = range.as_slice();
Ok(TypeAnnotation::TypeVarKind(*id, unifier.get_fresh_var_with_range(range).0))
} else {
Err("not a type variable identifier".into())
}
} else {
Err("unsupported expression for type variable".into())
}
}

5
nac3core/src/typecheck/type_inferencer/test.rs
View File

@ -1,7 +1,10 @@
use super::super::typedef::*;
use super::*;
use crate::symbol_resolver::*;
use crate::{location::Location, toplevel::{DefinitionId, TopLevelDef}};
use crate::{
location::Location,
toplevel::{DefinitionId, TopLevelDef},
};
use indoc::indoc;
use itertools::zip;
use parking_lot::RwLock;