Re: lex input from a queue

sumesh <sumesh_uk@hotmail.com>
1 May 2002 23:21:54 -0400

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lex input from a queue anuradha.kr@sonata-software.com (2002-04-29)
Re: lex input from a queue sumesh_uk@hotmail.com (sumesh) (2002-05-01)
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From: sumesh <sumesh_uk@hotmail.com>
Newsgroups: comp.compilers
Date: 1 May 2002 23:21:54 -0400
Organization: The George Washington University
References: 02-04-165
Keywords: lex
Posted-Date: 01 May 2002 23:21:54 EDT

In most of the lex versions you can redefine the function which is
used to take input . But the function which is used to take the input
most of the times is different based on what lex software you are
using .


        So like in the case of the lex found on a lot of systems , the
macros used are called input() and unput .Input reads the character
and returns it back. So just change it to return whatever you want . I
guess in the software you are using its called yygetchar. In flex its
called YY_INPUT and it returns the no of characters read .


sumesh


"anuradha.k.r" <anuradha.kr@sonata-software.com> wrote
> ...We are planning to store the robot controlling commands
> in a buffer(Queue).This queue should be the input to the lex.

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