How to make YY_INPUT point to a string rather than stdin in Lex & Yacc (Solaris)

Question

I want my yylex() to parse a string rather than a file or standard input. How can I do it with the Lex and Yacc provided with Solaris?

Answer 1

If you are using the real lex and not flex I believe you can simply define your own

int input(void);

This can return characters from a string or whatever you want.

Alternatively, I believe you could write the string to a file, and open the file on stream yyin. I suspect this would work with either implementation.

If using flex then I think you redefine the YY_INPUT() macro,