Rollup merge of rust-lang#81281 - a1phyr:inline_path, r=dtolnay

Inline methods of Path and OsString

These methods are not generic, and therefore aren't candidates for cross-crate inlining without an `#[inline]` attribute.

Author: jonas-schievink

library/std/src/ffi/os_str.rs

@@ -111,6 +111,7 @@ impl OsString {
     /// let os_string = OsString::new();
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn new() -> OsString {
         OsString { inner: Buf::from_string(String::new()) }
     }
@@ -127,6 +128,7 @@ impl OsString {
     /// assert_eq!(os_string.as_os_str(), os_str);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn as_os_str(&self) -> &OsStr {
         self
     }
@@ -145,6 +147,7 @@ impl OsString {
     /// assert_eq!(string, Ok(String::from("foo")));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn into_string(self) -> Result<String, OsString> {
         self.inner.into_string().map_err(|buf| OsString { inner: buf })
     }
@@ -163,6 +166,7 @@ impl OsString {
     /// assert_eq!(&os_string, "foobar");
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn push<T: AsRef<OsStr>>(&mut self, s: T) {
         self.inner.push_slice(&s.as_ref().inner)
     }
@@ -189,6 +193,7 @@ impl OsString {
     /// assert_eq!(capacity, os_string.capacity());
     /// ```
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn with_capacity(capacity: usize) -> OsString {
         OsString { inner: Buf::with_capacity(capacity) }
     }
@@ -207,6 +212,7 @@ impl OsString {
     /// assert_eq!(&os_string, "");
     /// ```
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn clear(&mut self) {
         self.inner.clear()
     }
@@ -224,6 +230,7 @@ impl OsString {
     /// assert!(os_string.capacity() >= 10);
     /// ```
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn capacity(&self) -> usize {
         self.inner.capacity()
     }
@@ -243,6 +250,7 @@ impl OsString {
     /// assert!(s.capacity() >= 10);
     /// ```
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn reserve(&mut self, additional: usize) {
         self.inner.reserve(additional)
     }
@@ -265,6 +273,7 @@ impl OsString {
     /// assert!(s.capacity() >= 10);
     /// ```
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn reserve_exact(&mut self, additional: usize) {
         self.inner.reserve_exact(additional)
     }
@@ -285,6 +294,7 @@ impl OsString {
     /// assert_eq!(3, s.capacity());
     /// ```
     #[stable(feature = "osstring_shrink_to_fit", since = "1.19.0")]
+    #[inline]
     pub fn shrink_to_fit(&mut self) {
         self.inner.shrink_to_fit()
     }
@@ -342,6 +352,7 @@ impl From<String> for OsString {
     /// Converts a [`String`] into a [`OsString`].
     ///
     /// The conversion copies the data, and includes an allocation on the heap.
+    #[inline]
     fn from(s: String) -> OsString {
         OsString { inner: Buf::from_string(s) }
     }
@@ -408,34 +419,39 @@ impl fmt::Debug for OsString {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl PartialEq for OsString {
+    #[inline]
     fn eq(&self, other: &OsString) -> bool {
         &**self == &**other
     }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl PartialEq<str> for OsString {
+    #[inline]
     fn eq(&self, other: &str) -> bool {
         &**self == other
     }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl PartialEq<OsString> for str {
+    #[inline]
     fn eq(&self, other: &OsString) -> bool {
         &**other == self
     }
 }
 
 #[stable(feature = "os_str_str_ref_eq", since = "1.29.0")]
 impl PartialEq<&str> for OsString {
+    #[inline]
     fn eq(&self, other: &&str) -> bool {
         **self == **other
     }
 }
 
 #[stable(feature = "os_str_str_ref_eq", since = "1.29.0")]
 impl<'a> PartialEq<OsString> for &'a str {
+    #[inline]
     fn eq(&self, other: &OsString) -> bool {
         **other == **self
     }
@@ -539,6 +555,7 @@ impl OsStr {
     /// assert_eq!(os_str.to_str(), Some("foo"));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn to_str(&self) -> Option<&str> {
         self.inner.to_str()
     }
@@ -589,6 +606,7 @@ impl OsStr {
     /// }
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn to_string_lossy(&self) -> Cow<'_, str> {
         self.inner.to_string_lossy()
     }
@@ -605,6 +623,7 @@ impl OsStr {
     /// assert_eq!(os_string, OsString::from("foo"));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[inline]
     pub fn to_os_string(&self) -> OsString {
         OsString { inner: self.inner.to_owned() }
     }
@@ -655,6 +674,7 @@ impl OsStr {
     /// ```
     #[doc(alias = "length")]
     #[stable(feature = "osstring_simple_functions", since = "1.9.0")]
+    #[inline]
     pub fn len(&self) -> usize {
         self.inner.inner.len()
     }
@@ -696,6 +716,7 @@ impl OsStr {
     /// assert_eq!("grÜße, jÜrgen ❤", s);
     /// ```
     #[unstable(feature = "osstring_ascii", issue = "70516")]
+    #[inline]
     pub fn make_ascii_lowercase(&mut self) {
         self.inner.make_ascii_lowercase()
     }
@@ -721,6 +742,7 @@ impl OsStr {
     /// assert_eq!("GRüßE, JüRGEN ❤", s);
     /// ```
     #[unstable(feature = "osstring_ascii", issue = "70516")]
+    #[inline]
     pub fn make_ascii_uppercase(&mut self) {
         self.inner.make_ascii_uppercase()
     }
@@ -784,6 +806,7 @@ impl OsStr {
     /// assert!(!non_ascii.is_ascii());
     /// ```
     #[unstable(feature = "osstring_ascii", issue = "70516")]
+    #[inline]
     pub fn is_ascii(&self) -> bool {
         self.inner.is_ascii()
     }
@@ -811,6 +834,7 @@ impl OsStr {
 
 #[stable(feature = "box_from_os_str", since = "1.17.0")]
 impl From<&OsStr> for Box<OsStr> {
+    #[inline]
     fn from(s: &OsStr) -> Box<OsStr> {
         let rw = Box::into_raw(s.inner.into_box()) as *mut OsStr;
         unsafe { Box::from_raw(rw) }
@@ -832,6 +856,7 @@ impl From<Cow<'_, OsStr>> for Box<OsStr> {
 impl From<Box<OsStr>> for OsString {
     /// Converts a [`Box`]`<`[`OsStr`]`>` into a `OsString` without copying or
     /// allocating.
+    #[inline]
     fn from(boxed: Box<OsStr>) -> OsString {
         boxed.into_os_string()
     }
@@ -840,6 +865,7 @@ impl From<Box<OsStr>> for OsString {
 #[stable(feature = "box_from_os_string", since = "1.20.0")]
 impl From<OsString> for Box<OsStr> {
     /// Converts a [`OsString`] into a [`Box`]`<OsStr>` without copying or allocating.
+    #[inline]
     fn from(s: OsString) -> Box<OsStr> {
         s.into_boxed_os_str()
     }
@@ -925,6 +951,7 @@ impl<'a> From<Cow<'a, OsStr>> for OsString {
 
 #[stable(feature = "box_default_extra", since = "1.17.0")]
 impl Default for Box<OsStr> {
+    #[inline]
     fn default() -> Box<OsStr> {
         let rw = Box::into_raw(Slice::empty_box()) as *mut OsStr;
         unsafe { Box::from_raw(rw) }
@@ -1075,6 +1102,7 @@ impl OsStr {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Borrow<OsStr> for OsString {
+    #[inline]
     fn borrow(&self) -> &OsStr {
         &self[..]
     }
@@ -1083,16 +1111,19 @@ impl Borrow<OsStr> for OsString {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl ToOwned for OsStr {
     type Owned = OsString;
+    #[inline]
     fn to_owned(&self) -> OsString {
         self.to_os_string()
     }
+    #[inline]
     fn clone_into(&self, target: &mut OsString) {
         self.inner.clone_into(&mut target.inner)
     }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl AsRef<OsStr> for OsStr {
+    #[inline]
     fn as_ref(&self) -> &OsStr {
         self
     }
@@ -1123,12 +1154,14 @@ impl AsRef<OsStr> for String {
 }
 
 impl FromInner<Buf> for OsString {
+    #[inline]
     fn from_inner(buf: Buf) -> OsString {
         OsString { inner: buf }
     }
 }
 
 impl IntoInner<Buf> for OsString {
+    #[inline]
     fn into_inner(self) -> Buf {
         self.inner
     }
@@ -1145,6 +1178,7 @@ impl AsInner<Slice> for OsStr {
 impl FromStr for OsString {
     type Err = core::convert::Infallible;
 
+    #[inline]
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         Ok(OsString::from(s))
     }