String input to flex lexer

Question

I want to create a read-eval-print loop using flex/bison parser. Trouble is, the flex generated lexer wants input of type FILE* and i would like it to be char*. Is there an

Answer 1

Here is what I needed to do :

extern yy_buffer_state;
typedef yy_buffer_state *YY_BUFFER_STATE;
extern int yyparse();
extern YY_BUFFER_STATE yy_scan_buffer(char *, size_t);

int main(int argc, char** argv) {

  char tstr[] = "line i want to parse\n\0\0";
  // note yy_scan_buffer is is looking for a double null string
  yy_scan_buffer(tstr, sizeof(tstr));
  yy_parse();
  return 0;
}

you cannot extern the typedef, which make sense when you think about it.