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Subject: Re: [boost] [program_options] validation_error in 1.42
From: Vladimir Prus (ghost_at_[hidden])
Date: 2010-03-09 11:39:59

Alexander Fokin wrote:
> It seems the way program_options deals with validation errors was
> changed in 1.42.
> Constructor of validation_error now takes kind_t and option name and
> value. Before 1.42 it was possible to specify what exactly was wrong
> with the option value in the constructor of validation_error. Now I
> see no options but to subclass validation_error. Was this change
> intentional?

It would expect so. IIUC, the change was made so that code that catches
validation_error can emit localized or otherwise customized error message.
Maybe, there should be an additional parameter to specify details?

> Also, documentation need to be fixed to reflect these changes. More
> precisely, the following line in "Custom Validators" section will lead
> to compilation error:
>> throw validation_error("invalid value");

Could you file an issue on about this?


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