Add feature gates for `for` and `?` in consts These operations seems *relatively* straightforward to support, and only seem to be blocked on `impl const Trait`. I have included a working test for `const_try`, but `const_for` is currently unusable without reimplementing *every single* defaulted `Iterator` method, so I didn't do that. (both features still need tracking issues before this is merged) |
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| .. | ||
| accepted.rs | ||
| active.rs | ||
| builtin_attrs.rs | ||
| lib.rs | ||
| removed.rs | ||
| tests.rs | ||