M-Labs/nac3
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nac3core: fix for loop type inference

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ychenfo 2021-12-12 05:39:48 +08:00 committed by Gitea
parent 91625dd327
commit ff27a1697e
1 changed files with 31 additions and 11 deletions
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42
nac3core/src/typecheck/type_inferencer/mod.rs
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@ -122,9 +122,36 @@ impl<'a> fold::Fold<()> for Inferencer<'a> {
},
}
}
ast::StmtKind::For { ref target, .. } => {
self.infer_pattern(target)?;
fold::fold_stmt(self, node)?
ast::StmtKind::For { target, iter, body, orelse, config_comment, type_comment } => {
self.infer_pattern(&target)?;
let target = self.fold_expr(*target)?;
let iter = self.fold_expr(*iter)?;
if self.unifier.unioned(iter.custom.unwrap(), self.primitives.range) {
self.unify(self.primitives.int32, target.custom.unwrap(), &target.location)?;
} else {
let list = self.unifier.add_ty(TypeEnum::TList { ty: target.custom.unwrap() });
self.unify(list, iter.custom.unwrap(), &iter.location)?;
}
let body = body
.into_iter()
.map(|b| self.fold_stmt(b))
.collect::<Result<Vec<_>, _>>()?;
let orelse = orelse
.into_iter()
.map(|o| self.fold_stmt(o))
.collect::<Result<Vec<_>, _>>()?;
Located {
location: node.location,
node: ast::StmtKind::For {
target: Box::new(target),
iter: Box::new(iter),
body,
orelse,
config_comment,
type_comment,
},
custom: None
}
}
ast::StmtKind::Assign { ref mut targets, ref config_comment, .. } => {
for target in targets.iter_mut() {
@ -201,14 +228,7 @@ impl<'a> fold::Fold<()> for Inferencer<'a> {
_ => fold::fold_stmt(self, node)?,
};
match &stmt.node {
ast::StmtKind::For { target, iter, .. } => {
if self.unifier.unioned(iter.custom.unwrap(), self.primitives.range) {
self.unify(self.primitives.int32, target.custom.unwrap(), &target.location)?;
} else {
let list = self.unifier.add_ty(TypeEnum::TList { ty: target.custom.unwrap() });
self.unify(list, iter.custom.unwrap(), &iter.location)?;
}
}
ast::StmtKind::For { .. } => {}
ast::StmtKind::If { test, .. } | ast::StmtKind::While { test, .. } => {
self.unify(test.custom.unwrap(), self.primitives.bool, &test.location)?;
}