1 files changed, 105 insertions, 0 deletions
diff --git a/clang/lib/ASTMatchers/Dynamic/VariantValue.cpp b/clang/lib/ASTMatchers/Dynamic/VariantValue.cpp
new file mode 100644
index 00000000000..e310fbfc58f
--- /dev/null
+++ b/clang/lib/ASTMatchers/Dynamic/VariantValue.cpp
@@ -0,0 +1,105 @@
+//===--- VariantValue.cpp - Polymorphic value type -*- C++ -*-===/
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Polymorphic value type.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/ASTMatchers/Dynamic/VariantValue.h"
+
+namespace clang {
+namespace ast_matchers {
+namespace dynamic {
+
+VariantValue::VariantValue(const VariantValue &Other) : Type(VT_Nothing) {
+  *this = Other;
+}
+
+VariantValue::VariantValue(const DynTypedMatcher &Matcher) : Type(VT_Nothing) {
+  setMatcher(Matcher);
+}
+
+VariantValue::VariantValue(const std::string &String) : Type(VT_Nothing) {
+  setString(String);
+}
+
+VariantValue::~VariantValue() { reset(); }
+
+VariantValue &VariantValue::operator=(const VariantValue &Other) {
+  if (this == &Other) return *this;
+  reset();
+  switch (Other.Type) {
+  case VT_String:
+    setString(Other.getString());
+    break;
+  case VT_Matcher:
+    setMatcher(Other.getMatcher());
+    break;
+  case VT_Nothing:
+    Type = VT_Nothing;
+    break;
+  }
+  return *this;
+}
+
+void VariantValue::reset() {
+  switch (Type) {
+  case VT_String:
+    delete Value.String;
+    break;
+  case VT_Matcher:
+    delete Value.Matcher;
+    break;
+  // Cases that do nothing.
+  case VT_Nothing:
+    break;
+  }
+  Type = VT_Nothing;
+}
+
+bool VariantValue::isString() const {
+  return Type == VT_String;
+}
+
+const std::string &VariantValue::getString() const {
+  assert(isString());
+  return *Value.String;
+}
+
+void VariantValue::setString(const std::string &NewValue) {
+  reset();
+  Type = VT_String;
+  Value.String = new std::string(NewValue);
+}
+
+bool VariantValue::isMatcher() const {
+  return Type == VT_Matcher;
+}
+
+const DynTypedMatcher &VariantValue::getMatcher() const {
+  assert(isMatcher());
+  return *Value.Matcher;
+}
+
+void VariantValue::setMatcher(const DynTypedMatcher &NewValue) {
+  reset();
+  Type = VT_Matcher;
+  Value.Matcher = NewValue.clone();
+}
+
+void VariantValue::takeMatcher(DynTypedMatcher *NewValue) {
+  reset();
+  Type = VT_Matcher;
+  Value.Matcher = NewValue;
+}
+
+} // end namespace dynamic
+} // end namespace ast_matchers
+} // end namespace clang