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Rollup merge of #82942 - m-ou-se:diagnostics-hardcoded-prelude-v1, r=estebank

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Don't hardcode the `v1` prelude in diagnostics, to allow for new preludes.

Instead of looking for `std::prelude::v1`, this changes the two places where that was hardcoded to look for `std::prelude::<anything>` instead.

This is needed for https://github.com/rust-lang/rust/pull/82217.

r? `@estebank`
This commit is contained in:
Yuki Okushi 2021-03-10 08:01:37 +09:00 committed by GitHub
commit 9dc82face3
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2 changed files with 7 additions and 2 deletions
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2
compiler/rustc_resolve/src/late/diagnostics.rs
View File

@ -334,7 +334,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
.lookup_import_candidates(ident, ns, &self.parent_scope, is_enum_variant)
.into_iter()
.map(|suggestion| import_candidate_to_enum_paths(&suggestion))
.filter(|(_, enum_ty_path)| enum_ty_path != "std::prelude::v1")
.filter(|(_, enum_ty_path)| !enum_ty_path.starts_with("std::prelude::"))
.collect();
if !enum_candidates.is_empty() {
if let (PathSource::Type, Some(span)) =

7
compiler/rustc_typeck/src/check/demand.rs
View File

@ -200,7 +200,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
if self.can_coerce(expr_ty, sole_field_ty) {
let variant_path = self.tcx.def_path_str(variant.def_id);
// FIXME #56861: DRYer prelude filtering
Some(variant_path.trim_start_matches("std::prelude::v1::").to_string())
if let Some(path) = variant_path.strip_prefix("std::prelude::") {
if let Some((_, path)) = path.split_once("::") {
return Some(path.to_string());
}
}
Some(variant_path)
} else {
None
}