Add a default getMacroWalkingBehavior() to unbreak out-of-tree clients

DougGregor · DougGregor · commit 45a09796b903 · 2023-02-28T21:34:05.000-08:00
diff --git a/include/swift/AST/ASTWalker.h b/include/swift/AST/ASTWalker.h
@@ -523,7 +523,9 @@ class ASTWalker {
   }
 
   /// This method configures how the walker should walk into uses of macros.
-  virtual MacroWalking getMacroWalkingBehavior() const = 0;
+  virtual MacroWalking getMacroWalkingBehavior() const {
+    return MacroWalking::ArgumentsAndExpansion;
+  }
 
   /// Determine whether we should walk macro arguments (as they appear in
   /// source) and the expansion (which is semantically part of the program).

Original file line number	Diff line number	Diff line change
`@@ -523,7 +523,9 @@ class ASTWalker {`
`523`	`523`	`}`
`524`	`524`
`525`	`525`	`/// This method configures how the walker should walk into uses of macros.`
`526`		`- virtual MacroWalking getMacroWalkingBehavior() const = 0;`
	`526`	`+ virtual MacroWalking getMacroWalkingBehavior() const {`
	`527`	`+ return MacroWalking::ArgumentsAndExpansion;`
	`528`	`+ }`
`527`	`529`
`528`	`530`	`/// Determine whether we should walk macro arguments (as they appear in`
`529`	`531`	`/// source) and the expansion (which is semantically part of the program).`