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a124924061
This one is a heavy `'tcx` user.
Two interesting ones:
This one had the `'tcx` declared on the function, despite the trait taking a `'tcx`:
```diff
-impl Visitor<'_> for UsedLocals {
+impl<'tcx> Visitor<'tcx> for UsedLocals {
fn visit_statement(&mut self, statement: &Statement<'tcx>, location: Location) {
```
This one use in-band for one, and underscore for the other:
```diff
-pub fn remove_dead_blocks(tcx: TyCtxt<'tcx>, body: &mut Body<'_>) {
+pub fn remove_dead_blocks<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
```
24 lines
735 B
Rust
24 lines
735 B
Rust
use rustc_middle::mir::visit::Visitor;
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use rustc_middle::mir::{Constant, Location};
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use rustc_middle::ty::ConstKind;
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pub struct RequiredConstsVisitor<'a, 'tcx> {
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required_consts: &'a mut Vec<Constant<'tcx>>,
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}
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impl<'a, 'tcx> RequiredConstsVisitor<'a, 'tcx> {
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pub fn new(required_consts: &'a mut Vec<Constant<'tcx>>) -> Self {
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RequiredConstsVisitor { required_consts }
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}
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}
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impl<'tcx> Visitor<'tcx> for RequiredConstsVisitor<'_, 'tcx> {
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fn visit_constant(&mut self, constant: &Constant<'tcx>, _: Location) {
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if let Some(ct) = constant.literal.const_for_ty() {
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if let ConstKind::Unevaluated(_) = ct.val {
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self.required_consts.push(*constant);
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}
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}
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}
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}
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