(isupper): New function. Use it instead of "".isupper.

doc/checkargs.py

@@ -61,6 +61,12 @@ def isalpha(s):
             return 0
     return 1
 
+def isupper(s):
+    for c in s:
+        if c not in "ABCDEFGHIJKLMNOPQRSTUVWXYZ":
+            return 0
+    return 1
+
 def isdigit(s):
     for c in s:
         if c not in "0123456789":
@@ -1110,12 +1116,12 @@ class lexer:
         ok = 1
         if len(tp) < 0:
             ok = 0
-        if ok and not tp[0].isupper():
+        if ok and not isupper(tp[0]):
             ok = 0
         upper = 0
         for c in tp[1:]:
             if upper:
-                if c == '-' or not c.isupper():
+                if c == '-' or not isupper(c):
                     ok = 0
                 upper = 0
             else: