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Matthias Krüger ea0b6504fa
Rollup merge of #111009 - scottmcm:ascii-char, r=BurntSushi 
Add `ascii::Char` (ACP#179)

ACP second: https://github.com/rust-lang/libs-team/issues/179#issuecomment-1527900570
New tracking issue: https://github.com/rust-lang/rust/issues/110998

For now this is an `enum` as `@kupiakos` [suggested](https://github.com/rust-lang/libs-team/issues/179#issuecomment-1527959724), with the variants under a different feature flag.

There's lots more things that could be added here, and place for further doc updates, but this seems like a plausible starting point PR.

I've gone through and put an `as_ascii` next to every `is_ascii`: on `u8`, `char`, `[u8]`, and `str`.

As a demonstration, made a commit updating some formatting code to use this: https://github.com/scottmcm/rust/commit/ascii-char-in-fmt (I don't want to include that in this PR, though, because that brings in perf questions that don't exist if this is just adding new unstable APIs.)
2023-05-04 19:18:21 +02:00
..
backtrace Use implicit capture syntax in format_args 2022-03-10 10:23:40 -05:00
collections rm const traits in libcore 2023-04-16 06:49:27 +00:00
env std: move "mod tests/benches" to separate files 2020-08-31 02:56:59 +00:00
error remove fn backtrace 2022-08-01 20:10:40 +00:00
f32 Remove some cfg(not(bootstrap)) 2022-12-11 01:20:18 -05:00
f64 Remove some cfg(not(bootstrap)) 2022-12-11 01:20:18 -05:00
ffi remove some unneeded imports 2023-04-12 19:27:18 +02:00
fs Correctly convert an NT path to a Win32 path 2023-05-03 10:24:56 +01:00
io replace version placeholders 2023-04-28 08:47:55 -07:00
net Inline AsInner implementations 2023-05-01 13:25:09 +02:00
num rustc_expand: Mark inner #![test] attributes as soft-unstable 2020-11-20 19:35:03 +03:00
os Inline AsRawFd implementations 2023-05-01 13:28:19 +02:00
panic review: fix nits and move panic safety tests to the correct place 2020-09-25 23:10:24 +02:00
path make many std tests work in Miri 2022-08-18 18:07:39 -04:00
personality Define UNWIND_DATA_REG for loongarch64 2023-04-08 00:09:54 +08:00
prelude correct std::prelude comment 2023-04-27 15:56:57 +02:00
process Implement read_buf for a few more types 2023-03-06 12:24:15 +01:00
sync replace version placeholders 2023-04-28 08:47:55 -07:00
sys Rollup merge of #105695 - joboet:remove_generic_parker, r=m-ou-se 2023-05-03 16:42:48 -07:00
sys_common Rollup merge of #105695 - joboet:remove_generic_parker, r=m-ou-se 2023-05-03 16:42:48 -07:00
thread Document const {} syntax for std::thread_local. 2023-04-27 20:24:18 +02:00
time Fix non-associativity of Instant math on aarch64-apple-darwin targets 2022-11-13 12:01:42 -08:00
alloc.rs Revert "Remove #[alloc_error_handler] from the compiler and library" 2023-04-25 00:08:35 +02:00
ascii.rs Add the basic ascii::Char type 2023-05-03 22:09:33 -07:00
backtrace.rs Replace libstd, libcore, liballoc in docs. 2022-12-30 14:00:40 +01:00
env.rs Rollup merge of #109894 - fleetingbytes:109893-var_os-never-returns-an-error, r=cuviper 2023-04-11 20:28:46 -07:00
error.rs remove cfg(bootstrap) 2022-09-26 10:14:45 +02:00
f32.rs Cover edge cases for {f32, f64}.hypot() docs 2023-04-13 22:41:55 +01:00
f64.rs Cover edge cases for {f32, f64}.hypot() docs 2023-04-13 22:41:55 +01:00
fs.rs Inline AsInner implementations 2023-05-01 13:25:09 +02:00
keyword_docs.rs Spelling library/ 2023-04-26 02:10:22 -04:00
lib.rs Revert "Report allocation errors as panics" 2023-04-25 00:08:37 +02:00
macros.rs Add tidy check for dbg 2022-12-31 15:32:09 +05:30
num.rs Add Saturating type (based on Wrapping type) 2021-08-10 19:27:01 +02:00
panic.rs review 2023-03-17 21:00:10 -07:00
panicking.rs Revert "Report allocation errors as panics" 2023-04-25 00:08:37 +02:00
path.rs Rollup merge of #109540 - marcospb19:edit-Path-with_file_name-example, r=m-ou-se 2023-05-01 17:10:22 +02:00
personality.rs Move personality functions to std 2022-08-23 16:12:58 +08:00
primitive_docs.rs Mention array<->tuple convs in docs 2023-05-03 20:34:47 +00:00
process.rs Inline AsInner implementations 2023-05-01 13:25:09 +02:00
rt.rs Replace libstd, libcore, liballoc in line comments. 2022-12-30 14:00:42 +01:00
time.rs update wasi_clock_time_api ref. 2023-04-29 19:04:16 +08:00