+ /* Any number of upper case words separated by spaces, ending in : */
+ for (;;) {
+ if (!isupper(line[len]))
+ return false;
+ len += strspn(line+len, IDENT_CHARS);
+ if (line[len] == ':')
+ break;
+
+ if (line[len] != ' ')
+ return false;
+ len++;
+ }