HelenOS sources

lc_switch         125 uspace/app/sbi/src/lex.c 	{ lc_switch,	"switch" },
lc_switch        1102 uspace/app/sbi/src/parse.c 	case lc_switch:
lc_switch        1245 uspace/app/sbi/src/parse.c 	lmatch(parse, lc_switch);
HelenOS homepage, sources at GitHub