Use a helper function to be more explicit regarding fully remapped paths

Author: Urgau

compiler/rustc_span/src/lib.rs

@@ -313,7 +313,7 @@ impl Hash for RealFileName {
         // remapped path if that exists. This is because remapped paths to
         // sysroot crates (/rust/$hash or /rust/$version) remain stable even
         // if the corresponding local path changes.
-        if !self.scopes.is_all() {
+        if !self.was_fully_remapped() {
             self.local.hash(state);
         }
         self.maybe_remapped.hash(state);
@@ -390,10 +390,17 @@ impl RealFileName {
     }
 
     /// Returns whenever the filename was remapped.
+    #[inline]
     pub(crate) fn was_remapped(&self) -> bool {
         !self.scopes.is_empty()
     }
 
+    /// Returns whenever the filename was fully remapped.
+    #[inline]
+    fn was_fully_remapped(&self) -> bool {
+        self.scopes.is_all()
+    }
+
     /// Returns an empty `RealFileName`
     ///
     /// Useful as the working directory input to `SourceMap::to_real_filename`.