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Actually implement the feature in the compiler

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Including all the bootstrapping tweaks in the library.
This commit is contained in:
Scott McMurray
2021-04-15 00:33:55 -07:00
parent c10eec3a1c
commit ca92b5a23a
10 changed files with 144 additions and 51 deletions
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10
compiler/rustc_ast_lowering/src/lib.rs
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@@ -331,7 +331,7 @@ pub fn lower_crate<'a, 'hir>(
lifetimes_to_define: Vec::new(),
is_collecting_in_band_lifetimes: false,
in_scope_lifetimes: Vec::new(),
allow_try_trait: Some([sym::try_trait][..].into()),
allow_try_trait: Some([sym::control_flow_enum, sym::try_trait_v2][..].into()),
allow_gen_future: Some([sym::gen_future][..].into()),
}
.lower_crate(krate)
@@ -2479,14 +2479,14 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
self.pat(span, hir::PatKind::Lit(expr))
}
fn pat_ok(&mut self, span: Span, pat: &'hir hir::Pat<'hir>) -> &'hir hir::Pat<'hir> {
fn pat_cf_continue(&mut self, span: Span, pat: &'hir hir::Pat<'hir>) -> &'hir hir::Pat<'hir> {
let field = self.single_pat_field(span, pat);
self.pat_lang_item_variant(span, hir::LangItem::ResultOk, field)
self.pat_lang_item_variant(span, hir::LangItem::ControlFlowContinue, field)
}
fn pat_err(&mut self, span: Span, pat: &'hir hir::Pat<'hir>) -> &'hir hir::Pat<'hir> {
fn pat_cf_break(&mut self, span: Span, pat: &'hir hir::Pat<'hir>) -> &'hir hir::Pat<'hir> {
let field = self.single_pat_field(span, pat);
self.pat_lang_item_variant(span, hir::LangItem::ResultErr, field)
self.pat_lang_item_variant(span, hir::LangItem::ControlFlowBreak, field)
}
fn pat_some(&mut self, span: Span, pat: &'hir hir::Pat<'hir>) -> &'hir hir::Pat<'hir> {