M-Labs/nac3
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[core] Refactor registration of top-level variables

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This commit is contained in:
David Mak 2024-10-07 16:52:39 +08:00
parent 9c6685fa8f
commit 65a12d9ab3
4 changed files with 87 additions and 73 deletions
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137
nac3core/src/toplevel/composer.rs
View File

@ -1,6 +1,6 @@
use std::rc::Rc;
use nac3parser::ast::{fold::Fold, ExprKind};
use nac3parser::ast::{fold::Fold, ExprKind, Ident};
use super::*;
use crate::{
@ -386,50 +386,17 @@ impl TopLevelComposer {
let ExprKind::Name { id: name, .. } = target.node else {
return Err(format!(
"global variable declaration must be an identifier (at {})",
ast.location
target.location
));
};
if self.keyword_list.contains(&name) {
return Err(format!(
"cannot use keyword `{}` as a class name (at {})",
name,
ast.location
));
}
let global_var_name = if mod_path.is_empty() {
name.to_string()
} else {
format!("{mod_path}.{name}")
};
if !defined_names.insert(global_var_name.clone()) {
return Err(format!(
"global variable `{}` defined twice (at {})",
global_var_name,
ast.location
));
}
let ty_to_be_unified = self.unifier.get_dummy_var().ty;
self.definition_ast_list.push((
RwLock::new(Self::make_top_level_variable_def(
global_var_name,
name,
// dummy here, unify with correct type later,
ty_to_be_unified,
*(annotation.clone()),
resolver,
Some(ast.location),
)).into(),
None,
));
Ok((
self.register_top_level_var(
name,
DefinitionId(self.definition_ast_list.len() - 1),
Some(ty_to_be_unified),
))
Some(annotation.as_ref().clone()),
resolver,
mod_path,
target.location,
)
}
_ => Err(format!(
@ -439,6 +406,50 @@ impl TopLevelComposer {
}
}
/// Registers a top-level variable with the given `name` into the composer.
///
/// `annotation` - The type annotation of the top-level variable, or [`None`] if no type
/// annotation is provided.
/// `location` - The location of the top-level variable.
pub fn register_top_level_var(
&mut self,
name: Ident,
annotation: Option<Expr>,
resolver: Option<Arc<dyn SymbolResolver + Send + Sync>>,
mod_path: &str,
location: Location,
) -> Result<(StrRef, DefinitionId, Option<Type>), String> {
if self.keyword_list.contains(&name) {
return Err(format!("cannot use keyword `{name}` as a class name (at {location})"));
}
let global_var_name =
if mod_path.is_empty() { name.to_string() } else { format!("{mod_path}.{name}") };
if !self.defined_names.insert(global_var_name.clone()) {
return Err(format!(
"global variable `{global_var_name}` defined twice (at {location})"
));
}
let ty_to_be_unified = self.unifier.get_dummy_var().ty;
self.definition_ast_list.push((
RwLock::new(Self::make_top_level_variable_def(
global_var_name,
name,
// dummy here, unify with correct type later,
ty_to_be_unified,
annotation,
resolver,
Some(location),
))
.into(),
None,
));
Ok((name, DefinitionId(self.definition_ast_list.len() - 1), Some(ty_to_be_unified)))
}
pub fn start_analysis(&mut self, inference: bool) -> Result<(), HashSet<String>> {
self.analyze_top_level_class_type_var()?;
self.analyze_top_level_class_bases()?;
@ -2249,9 +2260,8 @@ impl TopLevelComposer {
let primitives_store = &self.primitives_ty;
let mut analyze = |variable_def: &Arc<RwLock<TopLevelDef>>| -> Result<_, HashSet<String>> {
let variable_def = &mut *variable_def.write();
let TopLevelDef::Variable { ty: dummy_ty, ty_decl, resolver, loc, .. } = variable_def
let TopLevelDef::Variable { ty: dummy_ty, ty_decl, resolver, loc, .. } =
&*variable_def.read()
else {
// not top level variable def, skip
return Ok(());
@ -2259,25 +2269,28 @@ impl TopLevelComposer {
let resolver = &**resolver.as_ref().unwrap();
let ty_annotation = parse_ast_to_type_annotation_kinds(
resolver,
&temp_def_list,
unifier,
primitives_store,
ty_decl,
HashMap::new(),
)?;
let ty_from_ty_annotation = get_type_from_type_annotation_kinds(
&temp_def_list,
unifier,
primitives_store,
&ty_annotation,
&mut None,
)?;
if let Some(ty_decl) = ty_decl {
let ty_annotation = parse_ast_to_type_annotation_kinds(
resolver,
&temp_def_list,
unifier,
primitives_store,
ty_decl,
HashMap::new(),
)?;
let ty_from_ty_annotation = get_type_from_type_annotation_kinds(
&temp_def_list,
unifier,
primitives_store,
&ty_annotation,
&mut None,
)?;
unifier.unify(*dummy_ty, ty_from_ty_annotation).map_err(|e| {
HashSet::from([e.at(Some(loc.unwrap())).to_display(unifier).to_string()])
})?;
}
unifier.unify(*dummy_ty, ty_from_ty_annotation).map_err(|e| {
HashSet::from([e.at(Some(loc.unwrap())).to_display(unifier).to_string()])
})?;
Ok(())
};

2
nac3core/src/toplevel/helper.rs
View File

@ -600,7 +600,7 @@ impl TopLevelComposer {
name: String,
simple_name: StrRef,
ty: Type,
ty_decl: Expr,
ty_decl: Option<Expr>,
resolver: Option<Arc<dyn SymbolResolver + Send + Sync>>,
loc: Option<Location>,
) -> TopLevelDef {

4
nac3core/src/toplevel/mod.rs
View File

@ -158,8 +158,8 @@ pub enum TopLevelDef {
/// Type of the global variable.
ty: Type,
/// The declared type of the global variable.
ty_decl: Expr,
/// The declared type of the global variable, or [`None`] if no type annotation is provided.
ty_decl: Option<Expr>,
/// Symbol resolver of the module defined the class.
resolver: Option<Arc<dyn SymbolResolver + Send + Sync>>,

17
nac3standalone/src/main.rs
View File

@ -248,8 +248,9 @@ fn handle_assignment_pattern(
fn handle_global_var(
target: &Expr,
value: Option<&Expr>,
resolver: &(dyn SymbolResolver + Send + Sync),
resolver: &Arc<dyn SymbolResolver + Send + Sync>,
internal_resolver: &ResolverInternal,
composer: &mut TopLevelComposer,
) -> Result<(), String> {
let ExprKind::Name { id, .. } = target.node else {
return Err(format!(
@ -262,8 +263,12 @@ fn handle_global_var(
return Err(format!("global variable `{id}` must be initialized in its definition"));
};
if let Ok(val) = parse_parameter_default_value(value, resolver) {
if let Ok(val) = parse_parameter_default_value(value, &**resolver) {
internal_resolver.add_module_global(id, val);
let (name, def_id, _) = composer
.register_top_level_var(id, None, Some(resolver.clone()), "__main__", target.location)
.unwrap();
internal_resolver.add_id_def(name, def_id);
Ok(())
} else {
Err(format!(
@ -375,16 +380,12 @@ fn main() {
if let Err(err) = handle_global_var(
target,
value.as_ref().map(Box::as_ref),
resolver.as_ref(),
&resolver,
internal_resolver.as_ref(),
&mut composer,
) {
panic!("{err}");
}
let (name, def_id, _) = composer
.register_top_level(stmt, Some(resolver.clone()), "__main__", true)
.unwrap();
internal_resolver.add_id_def(name, def_id);
}
// allow (and ignore) "from __future__ import annotations"