Re: [Boost-Users] Re: spirit list_p example

From: Joel de Guzman (djowel_at_[hidden])
Date: 2003-08-30 05:59:52

Larry Knain <yg-boost-users_at_[hidden]> wrote:
> I should have said that this was a first attempt at using Spirit and I was
> just experimenting 
> with some simple examples.
> 
>  There are three examples in the code. The adjustment was made to the second
> example which is for CSV.  The string to be parsed was originally:
> 
> char const *plist_csv = "\"string\",\"string with an embedded \\\"\","
>         "12345,0.12345e4";
> Changed to:
> 
> char const *plist_csv = "\"string\",\"string with an embedded \\\"\","
>         "12345,0.12345e4,,2";
> These are at line 104.
> 
> The original parser line was:
> 
>  list_csv_item =
>             confix_p('\"', *c_escape_ch_p, '\"')
>         |   longest_d[real_p | int_p]

Try this:

    list_csv_item =
            confix_p('\"', *c_escape_ch_p, '\"')
        |   longest_d[real_p | int_p]
        |   eps_p
        ;

    list_csv =
        (
            list_csv_item[append(vec_item)] % ',' 
        )[append(vec_list)]

I guess the list_p was not designed to work with null entries. For such 
simple tasks, the % operator will do just fine.

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net
PS> If you have further questions, please post it to:
Spirit-general mailing list
Spirit-general_at_[hidden]
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Thanks!