bjoernager/rust
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first pass at default values for const generics

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- Adds optional default values to const generic parameters in the AST
  and HIR
- Parses these optional default values
- Adds a `const_generics_defaults` feature gate
This commit is contained in:
Julian Knodt 2020-12-31 01:58:27 +01:00 • committed by Rémy Rakic
parent f8ab56bf32
commit 61f33bfd29
20 changed files with 99 additions and 32 deletions
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6
compiler/rustc_typeck/src/check/wfcheck.rs
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@ -286,9 +286,9 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) {
// We currently only check wf of const params here.
hir::GenericParamKind::Lifetime { .. } | hir::GenericParamKind::Type { .. } => (),
// Const parameters are well formed if their
// type is structural match.
hir::GenericParamKind::Const { ty: hir_ty } => {
// Const parameters are well formed if their type is structural match.
// FIXME(const_generics_defaults): we also need to check that the `default` is wf.
hir::GenericParamKind::Const { ty: hir_ty, default: _ } => {
let ty = tcx.type_of(tcx.hir().local_def_id(param.hir_id));
let err_ty_str;