(flex.info.gz) unnamed-faq-63

 
 unnamed-faq-63
 ==============
 
 
      To: jimmey@lexis-nexis.com (Jimmey Todd)
      Subject: Re: FLEX question regarding istream vs ifstream
      In-reply-to: Your message of Mon, 08 Dec 1997 15:54:15 PST.
      Date: Mon, 15 Dec 1997 13:21:35 PST
      From: Vern Paxson <vern>
 
      >         stdin_handle = YY_CURRENT_BUFFER;
      >         ifstream fin( "aFile" );
      >         yy_switch_to_buffer( yy_create_buffer( fin, YY_BUF_SIZE ) );
      >
      > What I'm wanting to do, is pass the contents of a file thru one set
      > of rules and then pass stdin thru another set... It works great if, I
      > don't use the C++ classes. But since everything else that I'm doing is
      > in C++, I thought I'd be consistent.
      >
      > The problem is that 'yy_create_buffer' is expecting an istream* as it's
      > first argument (as stated in the man page). However, fin is a ifstream
      > object. Any ideas on what I might be doing wrong? Any help would be
      > appreciated. Thanks!!
 
      You need to pass &fin, to turn it into an ifstream* instead of an ifstream.
      Then its type will be compatible with the expected istream*, because ifstream
      is derived from istream.
 
      		Vern

Info Catalog

(flex.info.gz) unnamed-faq-62

(flex.info.gz) FAQ

(flex.info.gz) unnamed-faq-64

automatically generated byinfo2html