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Add #[must_use] to to_value conversions

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This commit is contained in:
John Kugelman
2021-10-11 19:04:24 -04:00
parent 5b210643eb
commit 0cf84c8c19
6 changed files with 38 additions and 2 deletions
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6
library/std/src/path.rs
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@@ -1945,6 +1945,8 @@ impl Path {
/// assert_eq!(path.to_str(), Some("foo.txt"));
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
#[inline]
pub fn to_str(&self) -> Option<&str> {
self.inner.to_str()
@@ -1971,6 +1973,8 @@ impl Path {
/// Had `path` contained invalid unicode, the `to_string_lossy` call might
/// have returned `"fo<66>.txt"`.
#[stable(feature = "rust1", since = "1.0.0")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
#[inline]
pub fn to_string_lossy(&self) -> Cow<'_, str> {
self.inner.to_string_lossy()
@@ -1987,6 +1991,8 @@ impl Path {
/// assert_eq!(path_buf, std::path::PathBuf::from("foo.txt"));
/// ```
#[rustc_conversion_suggestion]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn to_path_buf(&self) -> PathBuf {
PathBuf::from(self.inner.to_os_string())