Excise <cctype> from Clang (except clang-tblgen) in favor of CharInfo.h.

Nearly all of these changes are one-to-one replacements; the few that
aren't have to do with custom identifier validation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Stmt.cpp b/lib/AST/Stmt.cpp
index 3214a2b..2ae5a12 100644
--- a/lib/AST/Stmt.cpp
+++ b/lib/AST/Stmt.cpp
@@ -19,6 +19,7 @@
 #include "clang/AST/StmtCXX.h"
 #include "clang/AST/StmtObjC.h"
 #include "clang/AST/Type.h"
+#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Lex/Token.h"
 #include "llvm/ADT/StringExtras.h"
@@ -539,7 +540,7 @@
 
     // Handle %x4 and %x[foo] by capturing x as the modifier character.
     char Modifier = '\0';
-    if (isalpha(EscapedChar)) {
+    if (isLetter(EscapedChar)) {
       if (CurPtr == StrEnd) { // Premature end.
         DiagOffs = CurPtr-StrStart-1;
         return diag::err_asm_invalid_escape;
@@ -548,12 +549,12 @@
       EscapedChar = *CurPtr++;
     }
 
-    if (isdigit(EscapedChar)) {
+    if (isDigit(EscapedChar)) {
       // %n - Assembler operand n
       unsigned N = 0;
 
       --CurPtr;
-      while (CurPtr != StrEnd && isdigit(*CurPtr))
+      while (CurPtr != StrEnd && isDigit(*CurPtr))
         N = N*10 + ((*CurPtr++)-'0');
 
       unsigned NumOperands =