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| author | Oliver Scherer <github35764891676564198441@oli-obk.de> | 2019-08-21 02:23:46 +0200 |
|---|---|---|
| committer | Oliver Scherer <github35764891676564198441@oli-obk.de> | 2019-09-24 12:56:44 +0200 |
| commit | 7767e7fb165d527f1991175809a361f2d2313b80 (patch) | |
| tree | e2e776a76307c183bb2a762a2b1f630b71339b68 /src/libcore/str | |
| parent | 7fdea7a72abb9f5a58fdc19c0a298042291c53b2 (diff) | |
| download | rust-7767e7fb165d527f1991175809a361f2d2313b80.tar.gz rust-7767e7fb165d527f1991175809a361f2d2313b80.zip | |
Stabilize `str::len`, `[T]::len`, `is_empty` and `str::as_bytes` as const fn
Diffstat (limited to 'src/libcore/str')
| -rw-r--r-- | src/libcore/str/mod.rs | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs index 5e5b5593fd8..a6ec757faf1 100644 --- a/src/libcore/str/mod.rs +++ b/src/libcore/str/mod.rs @@ -2090,7 +2090,7 @@ impl str { /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] - #[rustc_const_unstable(feature = "const_str_len")] + #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_len"))] pub const fn len(&self) -> usize { self.as_bytes().len() } @@ -2110,7 +2110,7 @@ impl str { /// ``` #[inline] #[stable(feature = "rust1", since = "1.0.0")] - #[rustc_const_unstable(feature = "const_str_len")] + #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_len"))] pub const fn is_empty(&self) -> bool { self.len() == 0 } @@ -2168,7 +2168,9 @@ impl str { /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline(always)] - #[rustc_const_unstable(feature="const_str_as_bytes")] + #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_as_bytes"))] + // SAFETY: const sound because we transmute two types with the same layout + #[cfg_attr(not(bootstrap), allow_internal_unstable(const_fn_union))] pub const fn as_bytes(&self) -> &[u8] { #[repr(C)] union Slices<'a> { |