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bors ad02dc46ba Auto merge of #87194 - eddyb:const-value-mangling, r=michaelwoerister,oli-obk 
rustc_symbol_mangling: support structural constants and &str in v0.

This PR should unblock #85530 (except for float `const` generics, which AFAIK should've never worked).
(cc `@tmiasko` could the https://github.com/rust-lang/rust/pull/85530#issuecomment-857855379 failures be retried with a quick crater "subset" run of this PR + changing the default to `v0`? Just to make sure I didn't miss anything other than the floats)

The encoding is the one suggested before in e.g. https://github.com/rust-lang/rust/issues/61486#issuecomment-878932102, tho this PR won't by itself finish #61486, before closing that we'd likely want to move to `@oli-obk's` "valtrees" (i.e. #83234 and other associated work).

<hr>

**EDITs**:
1. switched unit/tuple/braced-with-named-fields `<const-fields>` prefixes from `"u"`/`"T"`/`""` to `"U"`/`"T"`/`"S"` to avoid the ambiguity reported by `@tmiasko` in https://github.com/rust-lang/rust/pull/87194#issuecomment-884279921.

2. `rustc-demangle` PR: https://github.com/alexcrichton/rustc-demangle/pull/55

3. RFC amendment PR: https://github.com/rust-lang/rfcs/pull/3161
    * also removed the grammar changes included in that PR, from this description

4. added tests (temporarily using my fork of `rustc-demangle`)

<hr>

r? `@michaelwoerister`
2021-08-26 19:15:09 +00:00
..
benches mv compiler to compiler/ 2020-08-30 18:45:07 +03:00
src Auto merge of #87194 - eddyb:const-value-mangling, r=michaelwoerister,oli-obk 2021-08-26 19:15:09 +00:00
Cargo.toml update polonius-engine to 0.13 2021-08-03 20:29:24 +02:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

For more information about how rustc works, see the rustc dev guide.