More powerful... Yes.

xighlight.c

@@ -38,13 +38,13 @@ int main (void) {
 		"char",     "short",    "int",      "long",     "signed",   "unsigned", "float",    "double"
 	};
 
-	syntax_define (& preprocessor,      0, 0, "#",                "\n", '\\', COLOUR_RED,    EFFECT_BOLD);
-	syntax_define (& line_comment,      0, 0, "//",               "\n", '\0', COLOUR_GREY,   EFFECT_BOLD);
-	syntax_define (& multiline_comment, 0, 0, "/*",               "*/", '\0', COLOUR_GREY,   EFFECT_BOLD);
-	syntax_define (& character,         0, 0, "'",                "'",  '\\', COLOUR_PINK,   EFFECT_BOLD);
-	syntax_define (& string,            0, 0, "\"",               "\"", '\\', COLOUR_RED,    EFFECT_BOLD);
-	syntax_define (& bracket,           1, 0, "()[]{}",           "",   '\0', COLOUR_GREEN,  EFFECT_BOLD);
-	syntax_define (& operator,          1, 0, ".,:;<=>+-*/%!&~^", "",   '\0', COLOUR_BLUE,   EFFECT_BOLD);
+	syntax_define (& preprocessor,      0, 0, "#",                 "\n", '\\', COLOUR_RED,    EFFECT_BOLD);
+	syntax_define (& line_comment,      0, 0, "//",                "\n", '\0', COLOUR_GREY,   EFFECT_BOLD);
+	syntax_define (& multiline_comment, 0, 0, "/*",                "*/", '\0', COLOUR_GREY,   EFFECT_BOLD);
+	syntax_define (& character,         0, 0, "'",                 "'",  '\\', COLOUR_PINK,   EFFECT_BOLD);
+	syntax_define (& string,            0, 0, "\"",                "\"", '\\', COLOUR_RED,    EFFECT_BOLD);
+	syntax_define (& bracket,           1, 0, "()[]{}",            "",   '\0', COLOUR_GREEN,  EFFECT_BOLD);
+	syntax_define (& operator,          1, 0, ".,:;<=>+-*/%!&~^?", "",   '\0', COLOUR_BLUE,   EFFECT_BOLD);
 
 	for (word = 0; word != 32; ++word) {
 		syntax_define (& keyword, 0, 1, c_keywords [word], separator, '\0', COLOUR_YELLOW, EFFECT_BOLD);