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Remove opt_const_param_of.

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This commit is contained in:
Camille GILLOT 2022-09-05 00:36:01 +02:00
parent b275d2c30b
commit f65f506d60
3 changed files with 94 additions and 182 deletions
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23
compiler/rustc_middle/src/query/mod.rs
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@ -127,29 +127,6 @@ rustc_queries! {
desc { |tcx| "getting HIR owner attributes in `{}`", tcx.def_path_str(key.to_def_id()) }
}
/// Computes the `DefId` of the corresponding const parameter in case the `key` is a
/// const argument and returns `None` otherwise.
///
/// ```ignore (incomplete)
/// let a = foo::<7>();
/// // ^ Calling `opt_const_param_of` for this argument,
///
/// fn foo<const N: usize>()
/// // ^ returns this `DefId`.
///
/// fn bar() {
/// // ^ While calling `opt_const_param_of` for other bodies returns `None`.
/// }
/// ```
// It looks like caching this query on disk actually slightly
// worsened performance in #74376.
//
// Once const generics are more prevalently used, we might want to
// consider only caching calls returning `Some`.
query opt_const_param_of(key: LocalDefId) -> Option<DefId> {
desc { |tcx| "computing the optional const parameter of `{}`", tcx.def_path_str(key.to_def_id()) }
}
/// Given the def_id of a const-generic parameter, computes the associated default const
/// parameter. e.g. `fn example<const N: usize=3>` called on `N` would return `3`.
query const_param_default(param: DefId) -> ty::EarlyBinder<ty::Const<'tcx>> {