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To: Henric Jungheim <>
Subject: Re: flex 2.5.4a
In-reply-to: Your message of Tue, 27 Oct 1998 16:41:42 PST.
Date: Tue, 27 Oct 1998 16:50:14 PST
From: Vern Paxson <vern>

> This brings up a feature request:  How about a command line
> option to specify the filename when reading from stdin?  That way one
> doesn't need to create a temporary file in order to get the "#line"
> directives to make sense.

Use -o combined with -t (per the man page description of -o).

> P.S., Is there any simple way to use non-blocking IO to parse multiple
> streams?

Simple, no.

One approach might be to return a magic character on EWOULDBLOCK and
have a rule

	.*<magic-character>	// put back .*, eat magic character

This is off the top of my head, not sure it'll work.