Just wanted to mention a way that we are currently simulating keyword arguments:

 

rule my-rule ( arg1 : arg2 : options * )

{

    local some-option = [ feature.get-values <some-option> : $(options) ] ;

    if some-value in $(some-option)

    {

        do-some-special-thing $(arg1) ;

    }

}

 

Which can then be called like so:

 

my-rule hello.cpp : hello.tr : <some-option>some-value <other-option>hello_world ;

 

It works really well as the build system supports it, however, I think it has a tendency

to confuse some developers as they are already confused about features/properties.

They tend to think the options passed are actually features/properties.

 

Aaron