v0: demangle structural constants and &str. #55
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This was referenced Aug 10, 2021
alexcrichton
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Prerequisites for "v0: demangle structural constants and &str" (#55).
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@eddyb, I think we can take this out of draft mode since we decided to go ahead and merge the implementation for experimentation before merging the RFC. |
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Done, just needs a review now. |
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Looks reasonable to me, thanks! |
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…woerister,oli-obk rustc_symbol_mangling: support structural constants and &str in v0. This PR should unblock rust-lang#85530 (except for float `const` generics, which AFAIK should've never worked). (cc `@tmiasko` could the rust-lang#85530 (comment) 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. rust-lang#61486 (comment), tho this PR won't by itself finish rust-lang#61486, before closing that we'd likely want to move to `@oli-obk's` "valtrees" (i.e. rust-lang#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 rust-lang#87194 (comment). 2. `rustc-demangle` PR: rust-lang/rustc-demangle#55 3. RFC amendment PR: rust-lang/rfcs#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`
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This is the demangling counterpart to rust-lang/rust#87194.
Opening as a draft PR until the RFC change (yet to be published) is accepted.Also, all but the last 4 commits are prerequisites, I'll open a separate PR for them.(EDIT: prerequisite PR is up at #56)
(EDIT2: prerequisite PR got merged)
cc @michaelwoerister