Re: [Boost-users] [qi] Get line number of an on_error handler from an ifstream iterator

Subject: Re: [Boost-users] [qi] Get line number of an on_error handler from an ifstream iterator
From: Joel de Guzman (joel_at_[hidden])
Date: 2011-09-13 22:40:14

On 9/14/2011 1:40 AM, boost_mailinglist_at_[hidden] wrote:
> Hello,
> 
> can anyone of you give me a hint, how I can get the line number of the input file inside
> the on_error handler where the parsing error happens?
> 
> Full source is atttached as file.cpp.

One way is to use the file_iterator adapter of spirit classic.
There are other ways. In the compiler-tutorial (*), I decorate the
AST nodes with a unique identifier to a map of iterators/or
positions which can be used to compute the file position on demand.

(* %BOOST%/libs/spirit/example/qi/compiler_tutorial )

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com