Move true/false StringRef helper to StringExtras

StringRef is a low-level data wrapper that shouldn't know about language
strings like 'true' and 'false' whereas StringExtras is just the place for
higher-level utilities.

llvm-svn: 200188

llvm/include/llvm/ADT/StringExtras.h

@@ -28,6 +28,11 @@ static inline char hexdigit(unsigned X, bool LowerCase = false) {
   return X < 10 ? '0' + X : HexChar + X - 10;
 }
 
+/// Construct a string ref from a boolean.
+static inline StringRef toStringRef(bool B) {
+  return StringRef(B ? "true" : "false");
+}
+
 /// Interpret the given character \p C as a hexadecimal digit and return its
 /// value.
 ///

llvm/include/llvm/ADT/StringRef.h

@@ -561,11 +561,6 @@ namespace llvm {
   // StringRefs can be treated like a POD type.
   template <typename T> struct isPodLike;
   template <> struct isPodLike<StringRef> { static const bool value = true; };
-
-  /// Construct a string ref from a boolean.
-  inline StringRef toStringRef(bool B) {
-    return StringRef(B ? "true" : "false");
-  }
 }
 
 #endif