Auto merge of #50413 - kennytm:rollup, r=kennytm

Rollup of 12 pull requests

Successful merges:

 - #50302 (Add query search order check)
 - #50320 (Fix invalid path generation in rustdoc search)
 - #50349 (Rename "show type declaration" to "show declaration")
 - #50360 (Clarify wordings of the `unstable_name_collision` lint.)
 - #50365 (Use two vectors in nearest_common_ancestor.)
 - #50393 (Allow unaligned reads in constants)
 - #50401 (Revert "Implement FromStr for PathBuf")
 - #50406 (Forbid constructing empty identifiers from concat_idents)
 - #50407 (Always inline simple BytePos and CharPos methods.)
 - #50416 (check if the token is a lifetime before parsing)
 - #50417 (Update Cargo)
 - #50421 (Fix ICE when using a..=b in a closure.)

Failed merges:

1 files changed, 10 insertions, 0 deletions

diff --git a/src/libsyntax_pos/lib.rs b/src/libsyntax_pos/lib.rs
index 8d37b4aa396..8b4a3ea26a1 100644
--- a/src/libsyntax_pos/lib.rs
+++ b/src/libsyntax_pos/lib.rs
@@ -1150,13 +1150,17 @@ pub struct CharPos(pub usize);
 // have been unsuccessful
 
 impl Pos for BytePos {
+    #[inline(always)]
     fn from_usize(n: usize) -> BytePos { BytePos(n as u32) }
+
+    #[inline(always)]
     fn to_usize(&self) -> usize { let BytePos(n) = *self; n as usize }
 }
 
 impl Add for BytePos {
     type Output = BytePos;
 
+    #[inline(always)]
     fn add(self, rhs: BytePos) -> BytePos {
         BytePos((self.to_usize() + rhs.to_usize()) as u32)
     }
@@ -1165,6 +1169,7 @@ impl Add for BytePos {
 impl Sub for BytePos {
     type Output = BytePos;
 
+    #[inline(always)]
     fn sub(self, rhs: BytePos) -> BytePos {
         BytePos((self.to_usize() - rhs.to_usize()) as u32)
     }
@@ -1183,13 +1188,17 @@ impl Decodable for BytePos {
 }
 
 impl Pos for CharPos {
+    #[inline(always)]
     fn from_usize(n: usize) -> CharPos { CharPos(n) }
+
+    #[inline(always)]
     fn to_usize(&self) -> usize { let CharPos(n) = *self; n }
 }
 
 impl Add for CharPos {
     type Output = CharPos;
 
+    #[inline(always)]
     fn add(self, rhs: CharPos) -> CharPos {
         CharPos(self.to_usize() + rhs.to_usize())
     }
@@ -1198,6 +1207,7 @@ impl Add for CharPos {
 impl Sub for CharPos {
     type Output = CharPos;
 
+    #[inline(always)]
     fn sub(self, rhs: CharPos) -> CharPos {
         CharPos(self.to_usize() - rhs.to_usize())
     }