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| author | bors <bors@rust-lang.org> | 2021-06-27 15:45:29 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2021-06-27 15:45:29 +0000 |
| commit | 9cdb2d3d59bad2843330535a41d0ebbb831fe57e (patch) | |
| tree | 9575d2912aefdbb1a2c65e686073a1528c5e9d05 | |
| parent | 49ba9361d87f5d58d54fdd164ef2128cd50ed4b4 (diff) | |
| parent | b3fbfe474b40b5747161668d830e7589af71be92 (diff) | |
| download | rust-9cdb2d3d59bad2843330535a41d0ebbb831fe57e.tar.gz rust-9cdb2d3d59bad2843330535a41d0ebbb831fe57e.zip | |
Auto merge of #86655 - jonas-schievink:const-arguments-as-str, r=kennytm
Make `fmt::Arguments::as_str` unstably const Motivation: mostly to move "panic!() in const contexts" forward, making use of `as_str` was mentioned in https://github.com/rust-lang/rust/issues/85194#issuecomment-852345377 and seems like the simplest way forward.
| -rw-r--r-- | library/core/src/fmt/mod.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs index 409a84367a7..9ed49c1e302 100644 --- a/library/core/src/fmt/mod.rs +++ b/library/core/src/fmt/mod.rs @@ -444,8 +444,9 @@ impl<'a> Arguments<'a> { /// assert_eq!(format_args!("{}", 1).as_str(), None); /// ``` #[stable(feature = "fmt_as_str", since = "1.52.0")] + #[rustc_const_unstable(feature = "const_arguments_as_str", issue = "none")] #[inline] - pub fn as_str(&self) -> Option<&'static str> { + pub const fn as_str(&self) -> Option<&'static str> { match (self.pieces, self.args) { ([], []) => Some(""), ([s], []) => Some(s), |