Backport: Templatize MakeUpperCase/MakeLowerCase so they work on char/int without casts.

Backport of changeset 6707:29e80e764b46.

1 files changed, 6 insertions, 4 deletions

diff --git a/lexlib/CharacterSet.h b/lexlib/CharacterSet.h
index be906ceaa..5965f38ca 100644
--- a/lexlib/CharacterSet.h
+++ b/lexlib/CharacterSet.h
@@ -167,16 +167,18 @@ inline bool isoperator(int ch) {
 	return false;
 }
 
-// Simple case functions for ASCII.
+// Simple case functions for ASCII supersets.
 
-inline int MakeUpperCase(int ch) {
+template <typename T>
+inline T MakeUpperCase(T ch) {
 	if (ch < 'a' || ch > 'z')
 		return ch;
 	else
-		return static_cast<char>(ch - 'a' + 'A');
+		return ch - 'a' + 'A';
 }
 
-inline int MakeLowerCase(int ch) {
+template <typename T>
+inline T MakeLowerCase(T ch) {
 	if (ch < 'A' || ch > 'Z')
 		return ch;
 	else