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/* Generated by re2c */
// re2c $INPUT -o $OUTPUT -i
#include <assert.h>
typedef enum { OK, FAIL } Result;
Result lex(const char *s) {
const char *YYCURSOR = s, *YYMARKER;
{
unsigned char yych;
unsigned int yyaccept = 0;
yych = *YYCURSOR;
switch (yych) {
case '.': goto yy3;
case '0': goto yy4;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy5;
default: goto yy1;
}
yy1:
++YYCURSOR;
yy2:
{ return FAIL; }
yy3:
yych = *++YYCURSOR;
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy7;
default: goto yy2;
}
yy4:
yyaccept = 0;
yych = *(YYMARKER = ++YYCURSOR);
switch (yych) {
case '.': goto yy7;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy9;
case 'E':
case 'e': goto yy11;
default: goto yy2;
}
yy5:
yyaccept = 1;
yych = *(YYMARKER = ++YYCURSOR);
switch (yych) {
case '.': goto yy7;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy5;
case 'E':
case 'e': goto yy11;
default: goto yy6;
}
yy6:
{ return OK; }
yy7:
yyaccept = 2;
yych = *(YYMARKER = ++YYCURSOR);
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy7;
case 'E':
case 'e': goto yy11;
default: goto yy8;
}
yy8:
{ return OK; }
yy9:
yych = *++YYCURSOR;
switch (yych) {
case '.': goto yy7;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy9;
case 'E':
case 'e': goto yy11;
default: goto yy10;
}
yy10:
YYCURSOR = YYMARKER;
switch (yyaccept) {
case 0: goto yy2;
case 1: goto yy6;
default: goto yy8;
}
yy11:
yych = *++YYCURSOR;
switch (yych) {
case '+':
case '-': goto yy12;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy13;
default: goto yy10;
}
yy12:
yych = *++YYCURSOR;
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy13;
default: goto yy10;
}
yy13:
yych = *++YYCURSOR;
switch (yych) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': goto yy13;
default: goto yy8;
}
}
}
int main() {
assert(lex("123") == OK);
assert(lex("123.4567") == OK);
return 0;
}
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