RE: [Boost-Users] spirit list_p example

From: HartmutKaiser_at_[hidden]
Date: 2003-08-29 15:30:06

Larry wrote:

>  From boost-1.30.2 I built the list_parser.cpp example using 
> MSVC++7.1.
> In the CSV list I added ",,2" to the end of the line to be 
> parsed.  

Could you please be more specific, where did you added the ",,2" ?

> The
> program ran but the neither of the added elements were included in the
> output vector.  Having used the tokenizer before I know it will 
> generally gobble up adjacent delimiters without any output. 
> You can get
> the empty token if you ask for the delimiters as well and then just 
> discard the delimiters (sort of).  But I was surprised that 
> the 2 didn't 
> make it to the output vector. I expected the empty list entry 
> would not 
> make the output vector. I tried adding ~anychar_p to the rule 
> but that 
> didn't help.  If I change the input list to add ",\"\",2" I 
> get "" and 2 
> in the output vector.  Applications like spreadsheets do not 
> put missing 
> column values for numeric columns as "" items generally.  Maybe I am 
> missing something because it certainly isn't the behavior I 
> would expect 
> (either from the parser or the tokenizer).

Please post a small (minimal) sample, which exposes the behaviour in
question. This helps us to spot the problem.

Regards
Hartmut

BTW: Spirit has its own mailing list:

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Please post further questions there. Thanks.