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| author | John Kugelman <john@kugelman.name> | 2021-10-11 16:15:50 -0400 |
|---|---|---|
| committer | John Kugelman <john@kugelman.name> | 2021-10-30 19:25:12 -0400 |
| commit | 6745e8da06e1fd313d2ff20ff9fe8d8dc4714479 (patch) | |
| tree | 3e95126f0f29319c6c2ce80aef7fc275c1c33897 /library/core | |
| parent | 86d6d2b7389fe1b339402c1798edae8b695fc9ef (diff) | |
| download | rust-6745e8da06e1fd313d2ff20ff9fe8d8dc4714479.tar.gz rust-6745e8da06e1fd313d2ff20ff9fe8d8dc4714479.zip | |
Add #[must_use] to len and is_empty
Diffstat (limited to 'library/core')
| -rw-r--r-- | library/core/src/ptr/non_null.rs | 1 | ||||
| -rw-r--r-- | library/core/src/str/mod.rs | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/library/core/src/ptr/non_null.rs b/library/core/src/ptr/non_null.rs index 87c8674af0d..1821954edd5 100644 --- a/library/core/src/ptr/non_null.rs +++ b/library/core/src/ptr/non_null.rs @@ -438,6 +438,7 @@ impl<T> NonNull<[T]> { /// ``` #[unstable(feature = "slice_ptr_len", issue = "71146")] #[rustc_const_unstable(feature = "const_slice_ptr_len", issue = "71146")] + #[must_use] #[inline] pub const fn len(self) -> usize { self.as_ptr().len() diff --git a/library/core/src/str/mod.rs b/library/core/src/str/mod.rs index 14ce94c178c..a6ba019f368 100644 --- a/library/core/src/str/mod.rs +++ b/library/core/src/str/mod.rs @@ -140,6 +140,7 @@ impl str { /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_stable(feature = "const_str_len", since = "1.39.0")] + #[must_use] #[inline] pub const fn len(&self) -> usize { self.as_bytes().len() @@ -158,9 +159,10 @@ impl str { /// let s = "not empty"; /// assert!(!s.is_empty()); /// ``` - #[inline] #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_stable(feature = "const_str_is_empty", since = "1.39.0")] + #[must_use] + #[inline] pub const fn is_empty(&self) -> bool { self.len() == 0 } |