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Rollup merge of #132503 - RalfJung:const-hash-map, r=Amanieu

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better test for const HashMap; remove const_hash leftovers

The existing `const_with_hasher` test is kind of silly since the HashMap it constructs can never contain any elements. So this adjusts the test to construct a usable HashMap, which is a bit non-trivial since the default hash builder cannot be built in `const`. `BuildHasherDefault::new()` helps but is unstable (https://github.com/rust-lang/rust/issues/123197), so we also have a test that does not involve that type.

The second commit removes the last remnants of https://github.com/rust-lang/rust/issues/104061, since they aren't actually useful -- without const traits, you can't do any hashing in `const`.

Cc ``@rust-lang/libs-api`` ``@rust-lang/wg-const-eval``
Closes #104061
Related to https://github.com/rust-lang/rust/issues/102575
This commit is contained in:
Matthias Krüger
2024-11-03 12:08:52 +01:00
committed by GitHub
parent b438a5cd2a 52666238cf
commit e9379382f9
6 changed files with 29 additions and 16 deletions
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library/core/src/lib.rs
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@@ -120,7 +120,6 @@
#![feature(const_eval_select)]
#![feature(const_exact_div)]
#![feature(const_float_methods)]
#![feature(const_hash)]
#![feature(const_heap)]
#![feature(const_nonnull_new)]
#![feature(const_option_ext)]