Added Stmt::DestroyChildren, which will be used by the dstors of the subclasses of Stmt to recursively delete their child AST nodes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51278 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 11 insertions, 0 deletions

diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index 5875d008b3..dac69a1610 100644
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -50,6 +50,12 @@ public:
 };
 private:
   const StmtClass sClass;
+  
+protected:
+  /// DestroyChildren - Invoked by destructors of subclasses of Stmt to
+  ///  recursively release child AST nodes.
+  void DestroyChildren();
+  
 public:
   Stmt(StmtClass SC) : sClass(SC) { 
     if (Stmt::CollectingStats()) Stmt::addStmtClass(SC);
diff --git a/lib/AST/Stmt.cpp b/lib/AST/Stmt.cpp
index 572280bc05..ffc6c2e62a 100644
--- a/lib/AST/Stmt.cpp
+++ b/lib/AST/Stmt.cpp
@@ -42,6 +42,11 @@ const char *Stmt::getStmtClassName() const {
   return getStmtInfoTableEntry(sClass).Name;
 }
 
+void Stmt::DestroyChildren() {
+  for (child_iterator I = child_begin(), E = child_end(); I !=E; ++I)
+    delete *I; // Handles the case when *I == NULL.
+}
+
 void Stmt::PrintStats() {
   // Ensure the table is primed.
   getStmtInfoTableEntry(Stmt::NullStmtClass);