static void dumpcclass(Reclass *cc) {
	Rune *p;
	for (p = cc->spans; p < cc->end; p += 2) {
		if (p[0] > 32 && p[0] < 127)
			printf(" %c", p[0]);
		else
			printf(" \\x%02x", p[0]);
		if (p[1] > 32 && p[1] < 127)
			printf("-%c", p[1]);
		else
			printf("-\\x%02x", p[1]);
	}
	putchar('\n');
}
static void dumpcclass(Reclass *cc) {
	Rune *p;
	for (p = cc->spans; p < cc->end; p += 2) {
		if (p[0] > 32 && p[0] < 127)
			printf(" %c", p[0]);
		else
			printf(" \\x%02x", p[0]);
		if (p[1] > 32 && p[1] < 127)
			printf("-%c", p[1]);
		else
			printf("-\\x%02x", p[1]);
	}
	putchar('\n');
}