Example of GCC's -Werror=switch

switch.c

/*
 * gcc -Werror=switch will produce an error for this
 */

#include <stdio.h>

enum language {
	ENGLISH,
	SPANISH,
	GERMAN
};

const char *convert(int num, enum language lang)
{
	const char *ret = "";

	switch (lang) {
	case ENGLISH:
		switch (num) {
		case 0: ret = "zero"; break;
		case 1: ret = "one"; break;
		default: ret = "..."; break;
		}
		break;

	case SPANISH:
		switch (num) {
		case 0: ret = "zero"; break;
		case 1: ret = "uno"; break;
		default: ret = "..."; break;
		}
		break;
	}
	return ret;
}

int main(void)
{
	printf("%s\n", convert(1, ENGLISH));
	return 0;
}