| commit | 969056dd8ca6827a37af58720ba3ca7ae7447da0 | [log] [tgz] |
|---|---|---|
| author | Jubilee <46493976+workingjubilee@users.noreply.github.com> | Wed Jun 12 03:57:19 2024 -0700 |
| committer | GitHub <noreply@github.com> | Wed Jun 12 03:57:19 2024 -0700 |
| tree | c30bba38047976a613f4e72945ff6950d7324a3f | |
| parent | 8d3b9a19cfdf5ee0561e43f3176d9501bcf2c4d9 [diff] | |
| parent | c8a36979e6410058ec359ce6abf68077b3237116 [diff] |
Rollup merge of #124514 - michaelwoerister:zero-disambiguator-demangling-recommendation, r=davidtwco Recommend to never display zero disambiguators when demangling v0 symbols This PR extends the [v0 symbol mangling documentation](https://doc.rust-lang.org/rustc/symbol-mangling/v0.html) with the strong recommendation that demanglers should never display zero-disambiguators, especially when dealing with `crate-root`. Being able to rely on `C3foo` to be rendered as `foo` (i.e. without explicit disambiguator value) rather than as `foo[0]` allows the compiler to encode things like new basic types in a backward compatible way. This idea has been originally proposed by `@eddyb` in [the discussion around supporting `f16` and `f128` in the v0 mangling scheme](https://github.com/rust-lang/rust/pull/122106). It is a generally useful mechanism for supporting a certain class of new elements in the v0 mangling scheme in a backward compatible way (whether as a temporary workaround until downstream tooling has picked up grammar changes or as a permanent encoding). cc `@tgross35`
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