Re: [boost] command line parameters parser

Subject: Re: [boost] command line parameters parser
From: Denis Shevchenko (shev.denis_at_[hidden])
Date: 2010-03-04 06:30:45

Christoph Heindl wrote:
 > Hi Denis
 >
 > How does your library compare to Boost.Program_options [1]?
 >
 > -- Christoph
 >
 > [1] http://www.boost.org/doc/libs/1_42_0/doc/html/program_options.html
 >

Hi, Christoph!

I now about Boost.Program_options, and use it in my programs some time. 
But later I decide create my own solution, because Boost.Program_options 
have some limitation.

First, it cannot call functions/functors. If I put in command line some 
parameter, I want some reaction on it. In my lib reaction occure 
immediately, in parsing process (but after all correction checks). Lib 
know nothing about this reaction's semantic, it just call correspond 
boost::signal.

Second, it cannot check "value semantic" of parameters. If parameter's 
value must be a valid path (or valid IPv4, or some else), I may want to 
check it immediately, in parsing process. In this case, my lib checks 
value's validity (using Boost.Filesystem, or my own algorithms) and, if 
error occurs, generate correspond std::exception.

Third (although it trifle), my lib allow set "name-value" separator. It 
can be useful, may be, I want use "--config:/home/my_file.conf" instead 
default "--config=/home/my_file.conf".

Denis