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Add storage dead for let bindings without initializer

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hkalbasi 2023-03-14 12:15:16 +03:30
parent 4cbb940cc4
commit d7da9e64d1
4 changed files with 79 additions and 44 deletions
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42
crates/hir-def/src/body.rs
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@ -24,7 +24,9 @@ use syntax::{ast, AstPtr, SyntaxNode, SyntaxNodePtr};
use crate::{
attr::Attrs,
db::DefDatabase,
expr::{dummy_expr_id, Binding, BindingId, Expr, ExprId, Label, LabelId, Pat, PatId},
expr::{
dummy_expr_id, Binding, BindingId, Expr, ExprId, Label, LabelId, Pat, PatId, RecordFieldPat,
},
item_scope::BuiltinShadowMode,
macro_id_to_def_id,
nameres::DefMap,
@ -432,6 +434,44 @@ impl Body {
pats.shrink_to_fit();
bindings.shrink_to_fit();
}
pub fn walk_bindings_in_pat(&self, pat_id: PatId, mut f: impl FnMut(BindingId)) {
self.walk_pats(pat_id, &mut |pat| {
if let Pat::Bind { id, .. } = pat {
f(*id);
}
});
}
pub fn walk_pats(&self, pat_id: PatId, f: &mut impl FnMut(&Pat)) {
let pat = &self[pat_id];
f(pat);
match pat {
Pat::Range { .. }
| Pat::Lit(..)
| Pat::Path(..)
| Pat::ConstBlock(..)
| Pat::Wild
| Pat::Missing => {}
&Pat::Bind { subpat, .. } => {
if let Some(subpat) = subpat {
self.walk_pats(subpat, f);
}
}
Pat::Or(args) | Pat::Tuple { args, .. } | Pat::TupleStruct { args, .. } => {
args.iter().copied().for_each(|p| self.walk_pats(p, f));
}
Pat::Ref { pat, .. } => self.walk_pats(*pat, f),
Pat::Slice { prefix, slice, suffix } => {
let total_iter = prefix.iter().chain(slice.iter()).chain(suffix.iter());
total_iter.copied().for_each(|p| self.walk_pats(p, f));
}
Pat::Record { args, .. } => {
args.iter().for_each(|RecordFieldPat { pat, .. }| self.walk_pats(*pat, f));
}
Pat::Box { inner } => self.walk_pats(*inner, f),
}
}
}
impl Default for Body {