emit c-string literals on Rust 1.77 or later #4269
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davidhewitt
reviewed
Jun 20, 2024
| LitCStr(LitCStr), | ||
| // There is currently no way to `concat!` c-string literals, we fallback to the `c_str!` macro in | ||
| // this case. | ||
| Tokens(TokenStream), |
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Agreed I think this case will have to stick around for the foreseeable future, but I think we would at least eventually be able to just use something like CStr::from_bytes_with_nul (which is const since 1.72).
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... or maybe #4270 is good enough for now :)
mejrs
reviewed
Jun 20, 2024
Co-authored-by: mejrs <59372212+mejrs@users.noreply.github.com>
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This emits c-string literals where possible when on Rust 1.77 or later.
Since we are not allowed to emit these literals on earlier Rust versions, we need to have the conditional compilation on the macro code itself, so I added a
build.rsto emit the requiredcfgs.We also have the case for
docattributes including macro invocations, since there is currently no way toconcat!c-string literals, this case falls back to thec_str!macroCloses #4261