source: downloads/boost_1_34_1/tools/build/v2/example/generate/Jamroot @ 29

import common ;
import "class" : new ;

rule generate-example ( project name : property-set : sources * )
{
    local result ;
    for local s in $(sources)
    {
        #local ea = [ $(s).action ] ;
        #local ep = [ $(ea).properties ] ;
        
        # Create a new action, that takes the source target
        # and runs 'common.copy' comamnd on it.
        local a  = [ 
           new non-scanning-action $(s) : common.copy : $(property-set) ] ; 
           
        local source-name = [ $(s).name ] ;
        
        # Create the target to represent the result of the action.
        # The target has the name that was specified in Jamfile
        # and passed here via the 'name' parameter, 
        # and the same type and project as the source.
        result += [ new file-target $(name) 
            : [ $(s).type ] 
                : $(project) 
                    : $(a) ] ; 
    }      
    return $(result) ;
}

generate a2 : a.cpp : <generating-rule>@generate-example ;