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-rw-r--r--include/llvm/Support/YAMLTraits.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/llvm/Support/YAMLTraits.h b/include/llvm/Support/YAMLTraits.h
index e704bf17fe..ea217c39fc 100644
--- a/include/llvm/Support/YAMLTraits.h
+++ b/include/llvm/Support/YAMLTraits.h
@@ -13,6 +13,7 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseMapInfo.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
@@ -421,6 +422,11 @@ public:
}
template <typename T>
+ void mapOptional(const char* Key, Optional<T> &Val) {
+ processKeyWithDefault(Key, Val, Optional<T>(), /*Required=*/false);
+ }
+
+ template <typename T>
typename std::enable_if<!has_SequenceTraits<T>::value,void>::type
mapOptional(const char* Key, T& Val) {
this->processKey(Key, Val, false);
@@ -433,6 +439,26 @@ public:
private:
template <typename T>
+ void processKeyWithDefault(const char *Key, Optional<T> &Val,
+ const Optional<T> &DefaultValue, bool Required) {
+ assert(DefaultValue.hasValue() == false &&
+ "Optional<T> shouldn't have a value!");
+ void *SaveInfo;
+ bool UseDefault;
+ const bool sameAsDefault = outputting() && !Val.hasValue();
+ if (!outputting() && !Val.hasValue())
+ Val = T();
+ if (this->preflightKey(Key, Required, sameAsDefault, UseDefault,
+ SaveInfo)) {
+ yamlize(*this, Val.getValue(), Required);
+ this->postflightKey(SaveInfo);
+ } else {
+ if (UseDefault)
+ Val = DefaultValue;
+ }
+ }
+
+ template <typename T>
void processKeyWithDefault(const char *Key, T &Val, const T& DefaultValue,
bool Required) {
void *SaveInfo;