Merge pull request #18754 from paldepind/rust-ref-pattern

Rust ref pattern

rust/ql/src/queries/unusedentities/UnusedValue.ql

@@ -22,4 +22,4 @@ where
   not isUnused(v) and
   not v instanceof DiscardVariable and
   not write.isInMacroExpansion()
-select write, "Variable $@ is assigned a value that is never used.", v, v.getName()
+select write, "Variable $@ is assigned a value that is never used.", v, v.getText()

rust/ql/src/queries/unusedentities/UnusedVariable.qll

@@ -4,7 +4,7 @@ import rust
  * A deliberately unused variable, for example `_` or `_x`.
  */
 class DiscardVariable extends Variable {
-  DiscardVariable() { this.getName().charAt(0) = "_" }
+  DiscardVariable() { this.getText().charAt(0) = "_" }
 }
 
 /**
@@ -25,5 +25,5 @@ predicate isAllowableUnused(Variable v) {
   v.getPat().isInMacroExpansion()
   or
   // a 'self' variable
-  v.getName() = "self"
+  v.getText() = "self"
 }