Re: Bison Output

[Hans Aberg]

On 31 May 2009, at 05:21, Luis Vital wrote:

> I have used Bison sometimes.
> Usually, after compiling Bison and Flex files the input come from a  
> file
> that we redirect to the executable and the output goes to the screen.
> If I want to give the input file as an argument in the command line  
> I can
> use 'yyin'.

The Bison generated parser just reads the stream handed down to it  
from the lexer. The Flex generated lexer can set where it reads, using  
yyrestart() - see the Flex manual.

> And what about the output? How can I send it to a file without  
> having to
> redirect it?

And the Bison generated parser just does what is written in the  
actions of grammar file. So just change this to write to a file or a  
stream that is defined externally to the parser code.

  Hans