Re: [Boost-build] Named metatarget parameters

Subject: Re: [Boost-build] Named metatarget parameters
From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2010-03-12 02:29:06

Rene Rivera wrote:
> Johan Nilsson wrote:
>> ... but looks even messier. Perhaps the first one (i.e. example after
>> the "Why not:" above) would be a reasonable candidate?
>
> I'm afraid that the whole "arg-type: value1 value2" is not going to
> work from a language parsing point of view because of:

I wasn't actually thinking about modifying the jam language, but rather to 
do it on the library level using e.g. regexes to find the "arg-type:", and 
invoke the rules as "up-level calls". I don't really know if it's possible 
and it's probably not the best from performance point of view, but given the 
"normal" amount of meta-targets I don't think it would be huge problem 
performance-wise.

If one would be willing to modify the core language, this would most likely 
not be my first suggestion.

>
> exe e : e.cpp :
>   my-option: What's that:
>   another-option: <fubar>2
> ;

With that "Why not:" above I referred to:

"Why not:

lib boost_math_long
    : parsers.cpp # By position
    : requirements
    <link>static
    [ target-builds has_long_long : "skipping boost.math long long" ]
    ;
"

Which should not be a problem, right?

Regards / Johan