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Don't synthesize host effect params for trait assoc fns marked const

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This commit is contained in:
León Orell Valerian Liehr 2024-01-01 23:23:11 +01:00
parent 88d69b72b4
commit ba860344e1
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3 changed files with 34 additions and 4 deletions
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10
compiler/rustc_ast_lowering/src/item.rs
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@ -1254,11 +1254,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
coroutine_kind: Option<CoroutineKind>,
) -> (&'hir hir::Generics<'hir>, hir::FnSig<'hir>) {
let header = self.lower_fn_header(sig.header);
// Don't pass along the user-provided constness of trait associated functions; we don't want to
// synthesize a host effect param for them. We reject `const` on them during AST validation.
let constness = if kind == FnDeclKind::Inherent { sig.header.constness } else { Const::No };
let itctx = ImplTraitContext::Universal;
let (generics, decl) =
self.lower_generics(generics, sig.header.constness, id, &itctx, |this| {
this.lower_fn_decl(&sig.decl, id, sig.span, kind, coroutine_kind)
});
let (generics, decl) = self.lower_generics(generics, constness, id, &itctx, |this| {
this.lower_fn_decl(&sig.decl, id, sig.span, kind, coroutine_kind)
});
(generics, hir::FnSig { header, decl, span: self.lower_span(sig.span) })
}