yylex            10140 ext/ripper/ripper.c # undef yylex
yylex            13046 ext/ripper/ripper.c yylex(void *lval, void *p)
yylex            4740 ext/ripper/ripper.y # undef yylex
yylex            7646 ext/ripper/ripper.y yylex(void *lval, void *p)
yylex              51 ext/syck/gram.c #define yylex   sycklex
yylex            10072 parse.c        # undef yylex
yylex            12978 parse.c        yylex(void *lval, void *p)
yylex            4740 parse.y        # undef yylex
yylex            7646 parse.y        yylex(void *lval, void *p)