bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Rollup merge of #121563 - Jarcho:use_cf, r=petrochenkov

Browse source 
Use `ControlFlow` in visitors.

Follow up to #121256

This does have a few small behaviour changes in some diagnostic output where the visitor will now find the first match rather than the last match. The change in `find_anon_types.rs` has the only affected test. I don't see this being an issue as the last occurrence isn't any better of a choice than the first.
This commit is contained in:
Matthias Krüger 2024-03-08 13:22:26 +01:00 • committed by GitHub
commit 3e634f8c5c
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
17 changed files with 240 additions and 270 deletions
Download patch file Download diff file Expand all files Collapse all files

22
compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs
View file

@ -6,6 +6,7 @@
//! the types in HIR to identify late-bound lifetimes and assign their Debruijn indices. This file
//! is also responsible for assigning their semantics to implicit lifetimes in trait objects.
use core::ops::ControlFlow;
use rustc_ast::visit::walk_list;
use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
use rustc_errors::{codes::*, struct_span_code_err};
@ -417,23 +418,18 @@ impl<'a, 'tcx> Visitor<'tcx> for BoundVarContext<'a, 'tcx> {
{
if let &hir::ClosureBinder::For { span: for_sp, .. } = binder {
fn span_of_infer(ty: &hir::Ty<'_>) -> Option<Span> {
struct V(Option<Span>);
struct V;
impl<'v> Visitor<'v> for V {
fn visit_ty(&mut self, t: &'v hir::Ty<'v>) {
match t.kind {
_ if self.0.is_some() => (),
hir::TyKind::Infer => {
self.0 = Some(t.span);
}
_ => intravisit::walk_ty(self, t),
type Result = ControlFlow<Span>;
fn visit_ty(&mut self, t: &'v hir::Ty<'v>) -> Self::Result {
if matches!(t.kind, hir::TyKind::Infer) {
ControlFlow::Break(t.span)
} else {
intravisit::walk_ty(self, t)
}
}
}
let mut v = V(None);
v.visit_ty(ty);
v.0
V.visit_ty(ty).break_value()
}
let infer_in_rt_sp = match fn_decl.output {