bjoernager/rust
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Fix suggestion to introduce explicit lifetime

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0yoyoyo 2021-02-12 00:40:54 +09:00
parent 07194ffcd2
commit 788e4bb4e5
3 changed files with 53 additions and 1 deletions
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7
compiler/rustc_infer/src/infer/error_reporting/mod.rs
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@ -2248,13 +2248,18 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
"...",
);
if let Some(infer::RelateParamBound(_, t)) = origin {
let return_impl_trait = self
.in_progress_typeck_results
.map(|typeck_results| typeck_results.borrow().hir_owner)
.and_then(|owner| self.tcx.return_type_impl_trait(owner))
.is_some();
let t = self.resolve_vars_if_possible(t);
match t.kind() {
// We've got:
// fn get_later<G, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
// suggest:
// fn get_later<'a, G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_ + 'a
ty::Closure(_, _substs) | ty::Opaque(_, _substs) => {
ty::Closure(_, _substs) | ty::Opaque(_, _substs) if return_impl_trait => {
new_binding_suggestion(&mut err, type_param_span, bound_kind);
}
_ => {