Merge pull request #13857 from DougGregor/demangle-is-swift-symbol-cstr

Author: swift-ci

include/swift/Demangling/Demangle.h

@@ -235,6 +235,11 @@ inline bool isMangledName(llvm::StringRef mangledName) {
 /// This includes the old (<= swift 3.x) mangling prefix "_T".
 bool isSwiftSymbol(llvm::StringRef mangledName);
 
+/// Returns true if the mangledName starts with the swift mangling prefix.
+///
+/// This includes the old (<= swift 3.x) mangling prefix "_T".
+bool isSwiftSymbol(const char *mangledName);
+
 /// Drops the Swift mangling prefix from the given mangled name, if there is
 /// one.
 ///

lib/Demangling/Demangler.cpp

@@ -139,6 +139,11 @@ bool swift::Demangle::isSwiftSymbol(llvm::StringRef mangledName) {
   return getManglingPrefixLength(mangledName) != 0;
 }
 
+bool swift::Demangle::isSwiftSymbol(const char *mangledName) {
+  StringRef mangledNameRef(mangledName, 4);
+  return isSwiftSymbol(mangledNameRef);
+}
+
 bool swift::Demangle::isOldFunctionTypeMangling(llvm::StringRef mangledName) {
   return mangledName.size() >= 2 && mangledName[0] == '_' &&
       mangledName[1] == 'T';