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
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