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| author | John Kugelman <john@kugelman.name> | 2021-10-10 18:22:40 -0400 |
|---|---|---|
| committer | John Kugelman <john@kugelman.name> | 2021-10-10 19:00:33 -0400 |
| commit | cf2bcd10ed28b169b8df74383c2a35a4ffbdcf40 (patch) | |
| tree | 87acd2edbff6d167abc4e8e70c702da9b9e350fa /library/std | |
| parent | 6928fafe06e4ab29317f75194e1bf67c119dccdc (diff) | |
| download | rust-cf2bcd10ed28b169b8df74383c2a35a4ffbdcf40.tar.gz rust-cf2bcd10ed28b169b8df74383c2a35a4ffbdcf40.zip | |
Add #[must_use] to from_value conversions
Diffstat (limited to 'library/std')
| -rw-r--r-- | library/std/src/ffi/c_str.rs | 5 | ||||
| -rw-r--r-- | library/std/src/io/error.rs | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/library/std/src/ffi/c_str.rs b/library/std/src/ffi/c_str.rs index fe1f28f00c4..e290350993d 100644 --- a/library/std/src/ffi/c_str.rs +++ b/library/std/src/ffi/c_str.rs @@ -425,6 +425,7 @@ impl CString { /// let c_string = CString::from_vec_unchecked(raw); /// } /// ``` + #[must_use] #[stable(feature = "rust1", since = "1.0.0")] pub unsafe fn from_vec_unchecked(mut v: Vec<u8>) -> CString { v.reserve_exact(1); @@ -476,6 +477,7 @@ impl CString { /// let c_string = CString::from_raw(raw); /// } /// ``` + #[must_use = "call `drop(from_raw(ptr))` if you intend to drop the `CString`"] #[stable(feature = "cstr_memory", since = "1.4.0")] pub unsafe fn from_raw(ptr: *mut c_char) -> CString { // SAFETY: This is called with a pointer that was obtained from a call @@ -701,6 +703,7 @@ impl CString { /// unsafe { CString::from_vec_unchecked(b"abc".to_vec()) } /// ); /// ``` + #[must_use] #[unstable(feature = "cstring_from_vec_with_nul", issue = "73179")] pub unsafe fn from_vec_with_nul_unchecked(v: Vec<u8>) -> Self { Self { inner: v.into_boxed_slice() } @@ -1162,6 +1165,7 @@ impl CStr { /// } /// # } /// ``` + #[must_use] #[stable(feature = "rust1", since = "1.0.0")] pub unsafe fn from_ptr<'a>(ptr: *const c_char) -> &'a CStr { // SAFETY: The caller has provided a pointer that points to a valid C @@ -1244,6 +1248,7 @@ impl CStr { /// } /// ``` #[inline] + #[must_use] #[stable(feature = "cstr_from_bytes", since = "1.10.0")] #[rustc_const_unstable(feature = "const_cstr_unchecked", issue = "none")] pub const unsafe fn from_bytes_with_nul_unchecked(bytes: &[u8]) -> &CStr { diff --git a/library/std/src/io/error.rs b/library/std/src/io/error.rs index 51666c0a3c7..57b5c28430f 100644 --- a/library/std/src/io/error.rs +++ b/library/std/src/io/error.rs @@ -473,6 +473,7 @@ impl Error { /// # } /// ``` #[stable(feature = "rust1", since = "1.0.0")] + #[must_use] #[inline] pub fn from_raw_os_error(code: i32) -> Error { Error { repr: Repr::Os(code) } |