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| author | Dylan DPC <99973273+Dylan-DPC@users.noreply.github.com> | 2023-09-17 11:23:24 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-09-17 11:23:24 +0000 |
| commit | 584eb696dff27a44492aa8751b11354b8e27a925 (patch) | |
| tree | 48fafa6e0be05d7e649dc474d35cf6fdccbf4e31 /compiler/rustc_mir_transform/src/coverage/debug.rs | |
| parent | 7cbe7fa6bffbf580bfa8fc6cbda68fdce21286e8 (diff) | |
| parent | 9c0e5ebf65ababd5ccae1211cb4831e605311b9a (diff) | |
| download | rust-584eb696dff27a44492aa8751b11354b8e27a925.tar.gz rust-584eb696dff27a44492aa8751b11354b8e27a925.zip | |
Rollup merge of #115434 - soqb:ascii-char-manual-debug, r=dtolnay
make `Debug` impl for `ascii::Char` match that of `char`
# Objective
use a more recognisable format for the `Debug` impl on `ascii::Char` than the derived one based off the enum variants. The alogorithm used is the following:
- escape `ascii::Char::{Null, CharacterTabulation, CarraigeReturn, LineFeed, ReverseSolidus, Apostrophe}` to `'\0'`, `'\t'`, `'\r'`, `'\n'`, `'\\'` and `'\''` respectively. these are the same escape codes as `<char as Debug>::fmt` uses.
- if `u8::is_ascii_control` is false, print the character wrapped in single quotes.
- otherwise, print in the format `'\xAB'` where `A` and `B` are the hex nibbles of the byte. (`char` uses unicode escapes and this seems like the corresponding ascii format).
Tracking issue: https://github.com/rust-lang/rust/issues/110998
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