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Rollup merge of #136646 - oli-obk:pattern-types-ast, r=BoxyUwU

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Add a TyPat in the AST to reuse the generic arg lowering logic

This simplifies ast lowering significantly with little cost to the pattern types parser.

Also fixes any problems we've had with generic args (well, pushes any problems onto the `generic_const_exprs` feature gate)

follow-up to https://github.com/rust-lang/rust/pull/136284#discussion_r1939292367

r? ``@BoxyUwU``
This commit is contained in:
Matthias Krüger 2025-02-12 06:07:37 +01:00 • committed by GitHub
commit 516dd06a25
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21 changed files with 241 additions and 264 deletions
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15
compiler/rustc_resolve/src/late.rs
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@ -923,6 +923,21 @@ impl<'ra: 'ast, 'ast, 'tcx> Visitor<'ast> for LateResolutionVisitor<'_, 'ast, 'r
self.diag_metadata.current_trait_object = prev;
self.diag_metadata.current_type_path = prev_ty;
}
fn visit_ty_pat(&mut self, t: &'ast TyPat) -> Self::Result {
match &t.kind {
TyPatKind::Range(start, end, _) => {
if let Some(start) = start {
self.resolve_anon_const(start, AnonConstKind::ConstArg(IsRepeatExpr::No));
}
if let Some(end) = end {
self.resolve_anon_const(end, AnonConstKind::ConstArg(IsRepeatExpr::No));
}
}
TyPatKind::Err(_) => {}
}
}
fn visit_poly_trait_ref(&mut self, tref: &'ast PolyTraitRef) {
let span = tref.span.shrink_to_lo().to(tref.trait_ref.path.span.shrink_to_lo());
self.with_generic_param_rib(