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20ca54b6a6
Improve escaping of byte, byte str, and c str proc-macro literals This PR changes the behavior of `proc_macro::Literal::byte_character` (https://github.com/rust-lang/rust/issues/115268), `byte_string`, and `c_string` (https://github.com/rust-lang/rust/issues/119750) to improve their choice of escape sequences. 3 categories of changes are made: 1. Never use `\x00`. Always prefer `\0`, which is supported in all the same places. 2. Never escape `\'` inside double quotes and `\"` inside single quotes. 3. Never use `\x` for valid UTF-8 in literals that permit `\u`. The second commit adds tests covering these cases, asserting the **old** behavior. The third commit implements the behavior change and simultaneously updates the tests to assert the **new** behavior. |
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| .. | ||
| alloc | ||
| backtrace@72265bea21 | ||
| core | ||
| panic_abort | ||
| panic_unwind | ||
| portable-simd | ||
| proc_macro | ||
| profiler_builtins | ||
| rtstartup | ||
| rustc-std-workspace-alloc | ||
| rustc-std-workspace-core | ||
| rustc-std-workspace-std | ||
| std | ||
| stdarch@df3618d9f3 | ||
| sysroot | ||
| test | ||
| unwind | ||