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[core] typecheck/type_inferencer: Infer whether variables are global

This commit is contained in:
David Mak 2024-10-05 17:07:13 +08:00
parent 51bf126a32
commit 3ce2eddcdc
2 changed files with 53 additions and 5 deletions
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21
nac3core/src/typecheck/function_check.rs
View File

@ -104,7 +104,22 @@ impl<'a> Inferencer<'a> {
*id,
) {
Ok(_) => {
self.defined_identifiers.insert(*id, IdentifierInfo::default());
let is_global = self.is_id_global(*id);
defined_identifiers.insert(
*id,
IdentifierInfo {
source: match is_global {
Some(true) => {
DeclarationSource::Global { is_explicit: Some(false) }
}
Some(false) => {
DeclarationSource::Global { is_explicit: None }
}
None => DeclarationSource::Local,
},
},
);
}
Err(e) => {
return Err(HashSet::from([format!(
@ -370,7 +385,7 @@ impl<'a> Inferencer<'a> {
if let Some(id_info) = defined_identifiers.get(id) {
if id_info.source == DeclarationSource::Local {
return Err(HashSet::from([format!(
"name '{id}' is assigned to before global declaration at {}",
"name '{id}' is referenced prior to global declaration at {}",
stmt.location,
)]));
}
@ -385,7 +400,7 @@ impl<'a> Inferencer<'a> {
*id,
) {
Ok(_) => {
self.defined_identifiers.insert(
defined_identifiers.insert(
*id,
IdentifierInfo {
source: DeclarationSource::Global { is_explicit: Some(true) },

37
nac3core/src/typecheck/type_inferencer/mod.rs
View File

@ -12,7 +12,7 @@ use itertools::{izip, Itertools};
use nac3parser::ast::{
self,
fold::{self, Fold},
Arguments, Comprehension, ExprContext, ExprKind, Located, Location, StrRef,
Arguments, Comprehension, ExprContext, ExprKind, Ident, Located, Location, StrRef,
};
use super::{
@ -594,7 +594,22 @@ impl<'a> Fold<()> for Inferencer<'a> {
*id,
) {
Ok(_) => {
self.defined_identifiers.insert(*id, IdentifierInfo::default());
let is_global = self.is_id_global(*id);
self.defined_identifiers.insert(
*id,
IdentifierInfo {
source: match is_global {
Some(true) => DeclarationSource::Global {
is_explicit: Some(false),
},
Some(false) => {
DeclarationSource::Global { is_explicit: None }
}
None => DeclarationSource::Local,
},
},
);
}
Err(e) => {
return report_error(
@ -2670,4 +2685,22 @@ impl<'a> Inferencer<'a> {
self.constrain(body.custom.unwrap(), orelse.custom.unwrap(), &body.location)?;
Ok(body.custom.unwrap())
}
/// Determines whether the given `id` refers to a global symbol.
///
/// Returns `Some(true)` if `id` refers to a global variable, `Some(false)` if `id` refers to a
/// class/function, and `None` if `id` refers to a local symbol.
pub(super) fn is_id_global(&self, id: Ident) -> Option<bool> {
self.top_level
.definitions
.read()
.iter()
.map(|def| match *def.read() {
TopLevelDef::Class { name, .. } => (name, false),
TopLevelDef::Function { simple_name, .. } => (simple_name, false),
TopLevelDef::Variable { simple_name, .. } => (simple_name, true),
})
.find(|(global, _)| global == &id)
.map(|(_, has_explicit_prop)| has_explicit_prop)
}
}