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14_options.i--tags.c
/* Generated by re2c */ #include <stdio.h> #include <string> #include <vector> typedef std::vector<std::pair<std::string, std::string> > unknown_t; struct options_t { std::string date; std::string path; std::string format; std::string limit; bool verbose; }; static void show(const options_t &o, const unknown_t &u) { printf("\noptions:\n"); printf(" date: %s\n", o.date.c_str()); printf(" path: %s\n", o.path.c_str()); printf(" format: %s\n", o.format.c_str()); printf(" limit: %s\n", o.limit.c_str()); printf(" verbose: %s\n", o.verbose ? "yes" : "no"); printf("\nunknown:\n"); unknown_t::const_iterator i = u.begin(), e = u.end(); for (; i != e; ++i) { printf(" %s: '%s'\n", i->first.c_str(), i->second.c_str()); } } static void bad_arg(const char *k, const char *v, const char *e) { printf("bad argument '%.*s' to option %.*s\n", (int) (e - v), v, (int) (v - k), k); } static int lex(const char *s) { options_t o; unknown_t u; const char *m, *k, *v; const char *yyt1;const char *yyt2;const char *yyt3;const char *yyt4;const char *yyt5; loop: { char yych; unsigned int yyaccept = 0; yych = *s; switch (yych) { case 0x00: goto yy2; case '\t': case '\n': case '\r': case ' ': goto yy6; case '-': yyt2 = s; goto yy9; default: goto yy4; } yy2: ++s; { show(o, u); return 0; } yy4: ++s; yy5: { printf("error: %s\n", s); return 1; } yy6: yych = *++s; switch (yych) { case '\t': case '\n': case '\r': case ' ': goto yy6; default: goto yy8; } yy8: { goto loop; } yy9: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy5; case '-': yyt3 = s; goto yy13; case 'd': yyt3 = s; goto yy14; case 'f': yyt3 = s; goto yy16; case 'l': yyt3 = s; goto yy17; case 'p': yyt3 = s; goto yy18; case 'v': yyt3 = s; goto yy20; default: yyt3 = s; goto yy10; } yy10: yych = *++s; yy11: switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt4 = s; goto yy12; case '"': yyt4 = s; goto yy22; case '=': yyt4 = s; goto yy24; default: goto yy10; } yy12: k = yyt3; v = yyt4; { u.push_back(std::make_pair(std::string(k, v), std::string(v, s))); goto loop; } yy13: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt4 = s; goto yy12; case '"': yyt1 = yyt4 = s; goto yy25; case '=': yyt4 = s; goto yy24; case 'd': yyt1 = s; goto yy27; case 'f': yyt1 = s; goto yy28; case 'l': yyt1 = s; goto yy29; case 'p': yyt1 = s; goto yy30; case 'v': yyt1 = s; goto yy31; default: yyt3 = s; goto yy10; } yy14: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt5 = s; goto yy34; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt1 = yyt5 = s; goto yy36; case '=': yyt5 = s; goto yy37; default: yyt5 = s; goto yy32; } yy15: k = yyt2; v = yyt5; { bad_arg(k, v, s); goto loop; } yy16: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt1 = yyt5 = s; goto yy38; case '=': yyt5 = s; goto yy37; default: yyt5 = s; goto yy32; } yy17: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt5 = s; goto yy34; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt1 = yyt5 = s; goto yy40; case '=': yyt5 = s; goto yy37; default: yyt5 = s; goto yy32; } yy18: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt1 = s; goto yy19; case '"': yyt1 = yyt5 = s; goto yy45; case '=': yyt5 = s; goto yy37; default: yyt1 = s; goto yy43; } yy19: v = yyt1; { o.path = std::string(v, s); goto loop; } yy20: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy21; default: goto yy11; } yy21: { o.verbose = true; goto loop; } yy22: yyaccept = 0; yych = *(m = ++s); switch (yych) { case 0x00: yyt4 = s; goto yy12; case '\t': case '\n': case '\r': case ' ': goto yy47; case '"': yyt4 = s; goto yy22; case '=': yyt4 = s; goto yy24; default: goto yy22; } yy24: yych = *++s; switch (yych) { case '"': goto yy52; default: goto yy51; } yy25: yyaccept = 1; yych = *(m = ++s); switch (yych) { case 0x00: yyt3 = yyt1; yyt4 = s; goto yy12; case '\t': case '\n': case '\r': case ' ': goto yy47; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; default: goto yy25; } yy27: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'a': goto yy54; default: yyt3 = yyt1; goto yy10; } yy28: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'o': goto yy55; default: yyt3 = yyt1; goto yy10; } yy29: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'i': goto yy56; default: yyt3 = yyt1; goto yy10; } yy30: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'a': goto yy57; default: yyt3 = yyt1; goto yy10; } yy31: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'e': goto yy58; default: yyt3 = yyt1; goto yy10; } yy32: yych = *++s; yy33: switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy15; case '"': yyt4 = s; goto yy59; case '=': yyt4 = s; goto yy24; default: goto yy32; } yy34: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: goto yy15; case '\t': case '\n': case '\r': case ' ': goto yy61; case '=': yyt4 = s; goto yy24; default: goto yy34; } yy36: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy63; default: goto yy33; } yy37: yych = *++s; switch (yych) { case '"': goto yy66; default: goto yy65; } yy38: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: goto yy15; case '\t': case '\n': case '\r': case ' ': goto yy68; case '"': goto yy70; case '=': yyt4 = s; goto yy24; default: goto yy38; } yy40: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy42; case '"': yyt4 = s; goto yy59; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy40; case '=': yyt4 = s; goto yy24; case 'B': case 'G': case 'K': case 'M': goto yy73; default: goto yy32; } yy42: v = yyt1; { o.limit = std::string(v, s); goto loop; } yy43: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy19; case '"': yyt4 = s; goto yy74; case '=': yyt4 = s; goto yy24; default: goto yy43; } yy45: yyaccept = 3; yych = *(m = ++s); switch (yych) { case 0x00: goto yy19; case '\t': case '\n': case '\r': case ' ': goto yy61; case '=': yyt4 = s; goto yy24; default: goto yy45; } yy47: yych = *++s; switch (yych) { case 0x00: case '=': goto yy49; case '"': goto yy76; default: goto yy47; } yy49: s = m; switch (yyaccept) { case 0: yyt4 = s; goto yy12; case 1: yyt3 = yyt1; yyt4 = s; goto yy12; case 2: goto yy15; case 3: goto yy19; case 4: goto yy12; default: goto yy72; } yy50: yych = *++s; yy51: switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy12; default: goto yy50; } yy52: yyaccept = 4; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy12; case '\t': case '\n': case '\r': case ' ': goto yy47; default: goto yy52; } yy54: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 't': goto yy78; default: yyt3 = yyt1; goto yy10; } yy55: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'r': goto yy79; default: yyt3 = yyt1; goto yy10; } yy56: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'm': goto yy80; default: yyt3 = yyt1; goto yy10; } yy57: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 't': goto yy81; default: yyt3 = yyt1; goto yy10; } yy58: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'r': goto yy82; default: yyt3 = yyt1; goto yy10; } yy59: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: goto yy15; case '\t': case '\n': case '\r': case ' ': goto yy47; case '"': yyt4 = s; goto yy59; case '=': yyt4 = s; goto yy24; default: goto yy59; } yy61: yych = *++s; switch (yych) { case 0x00: case '=': goto yy49; case '"': goto yy83; default: goto yy61; } yy63: yych = *++s; switch (yych) { case '/': goto yy85; default: goto yy33; } yy64: yych = *++s; yy65: switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy15; default: goto yy64; } yy66: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy15; case '\t': case '\n': case '\r': case ' ': goto yy61; default: goto yy66; } yy68: yych = *++s; switch (yych) { case 0x00: case '=': goto yy49; case '"': goto yy86; default: goto yy68; } yy70: yyaccept = 5; yych = *(m = ++s); switch (yych) { case 0x00: goto yy72; case '\t': case '\n': case '\r': case ' ': goto yy68; case '"': goto yy70; case '=': yyt4 = s; goto yy24; default: goto yy38; } yy72: v = yyt1; { o.format = std::string(v, s); goto loop; } yy73: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy42; default: goto yy33; } yy74: yyaccept = 3; yych = *(m = ++s); switch (yych) { case 0x00: goto yy19; case '\t': case '\n': case '\r': case ' ': goto yy47; case '"': yyt4 = s; goto yy74; case '=': yyt4 = s; goto yy24; default: goto yy74; } yy76: yyaccept = 4; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy12; case '"': goto yy76; default: goto yy47; } yy78: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'e': goto yy88; default: yyt3 = yyt1; goto yy10; } yy79: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'm': goto yy89; default: yyt3 = yyt1; goto yy10; } yy80: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'i': goto yy90; default: yyt3 = yyt1; goto yy10; } yy81: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'h': goto yy91; default: yyt3 = yyt1; goto yy10; } yy82: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'b': goto yy92; default: yyt3 = yyt1; goto yy10; } yy83: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy15; case '"': goto yy83; default: goto yy61; } yy85: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy93; default: goto yy33; } yy86: yyaccept = 5; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy72; case '"': goto yy86; default: goto yy68; } yy88: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt3 = yyt1; yyt5 = s; goto yy34; case '=': yyt5 = s; goto yy94; default: yyt3 = yyt1; yyt5 = s; goto yy32; } yy89: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'a': goto yy95; default: yyt3 = yyt1; goto yy10; } yy90: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 't': goto yy96; default: yyt3 = yyt1; goto yy10; } yy91: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt3 = yyt1; yyt5 = s; goto yy34; case '=': yyt5 = s; goto yy97; default: yyt3 = yyt1; yyt5 = s; goto yy32; } yy92: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'o': goto yy98; default: yyt3 = yyt1; goto yy10; } yy93: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy99; default: goto yy33; } yy94: yych = *++s; switch (yych) { case '"': goto yy66; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt1 = s; goto yy100; default: goto yy65; } yy95: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 't': goto yy101; default: yyt3 = yyt1; goto yy10; } yy96: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt3 = yyt1; yyt5 = s; goto yy34; case '=': yyt5 = s; goto yy102; default: yyt3 = yyt1; yyt5 = s; goto yy32; } yy97: yych = *++s; yyt1 = s; switch (yych) { case '"': goto yy105; default: goto yy104; } yy98: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 's': goto yy107; default: yyt3 = yyt1; goto yy10; } yy99: yych = *++s; switch (yych) { case '/': goto yy108; default: goto yy33; } yy100: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy109; default: goto yy65; } yy101: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt5 = s; goto yy15; case '"': yyt3 = yyt1; yyt5 = s; goto yy34; case '=': yyt5 = s; goto yy110; default: yyt3 = yyt1; yyt5 = s; goto yy32; } yy102: yych = *++s; switch (yych) { case '"': goto yy66; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt1 = s; goto yy111; default: goto yy65; } yy103: yych = *++s; yy104: switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy19; default: goto yy103; } yy105: yyaccept = 3; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy19; case '\t': case '\n': case '\r': case ' ': goto yy61; default: goto yy105; } yy107: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': yyt3 = yyt1; yyt4 = s; goto yy12; case '"': yyt3 = yyt1; yyt4 = s; goto yy22; case '=': yyt3 = yyt1; yyt4 = s; goto yy24; case 'e': yyt3 = yyt1; goto yy20; default: yyt3 = yyt1; goto yy10; } yy108: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy113; default: goto yy33; } yy109: yych = *++s; switch (yych) { case '/': goto yy114; default: goto yy65; } yy110: yych = *++s; switch (yych) { case '"': yyt1 = s; goto yy115; default: goto yy65; } yy111: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy42; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy111; case 'B': case 'G': case 'K': case 'M': goto yy117; default: goto yy64; } yy113: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy118; default: goto yy33; } yy114: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy119; default: goto yy65; } yy115: yyaccept = 2; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy15; case '\t': case '\n': case '\r': case ' ': goto yy68; case '"': goto yy120; default: goto yy115; } yy117: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy42; default: goto yy64; } yy118: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy122; default: goto yy33; } yy119: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy123; default: goto yy65; } yy120: yyaccept = 5; yych = *(m = ++s); switch (yych) { case 0x00: case '=': goto yy72; case '\t': case '\n': case '\r': case ' ': goto yy68; case '"': goto yy120; default: goto yy115; } yy122: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy124; default: goto yy33; } yy123: yych = *++s; switch (yych) { case '/': goto yy126; default: goto yy65; } yy124: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': goto yy125; default: goto yy33; } yy125: v = yyt1; { o.date = std::string(v, s); goto loop; } yy126: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy127; default: goto yy65; } yy127: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy128; default: goto yy65; } yy128: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy129; default: goto yy65; } yy129: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy130; default: goto yy65; } yy130: yych = *++s; switch (yych) { case 0x00: case '\t': case '\n': case '\r': case ' ': case '=': goto yy125; default: goto yy64; } } } int main(int argc, char **argv) { for (int i = 1; i < argc; ++i) lex(argv[i]); return 0; } 14_options.i--tags.re:68:12: warning: rule matches empty string [-Wmatch-empty-string] 14_options.i--tags.re:80:35: warning: tag 'k' has 2nd degree of nondeterminism [-Wnondeterministic-tags] 14_options.i--tags.re:80:35: warning: tag 'v' has 2nd degree of nondeterminism [-Wnondeterministic-tags]