# Copyright 2002, 2003, 2004, 2005 Dave Abrahams
# Copyright 2002, 2005, 2006, 2007, 2010 Rene Rivera
# Copyright 2006 Juergen Hunold
# Copyright 2005 Toon Knapen
# Copyright 2002, 2003, 2004, 2005, 2006 Vladimir Prus
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

# Defines standard features and rules.

import alias ;
import "class" : new ;
import errors ;
import feature ;
import features/__init_features__ ;
import generators ;
import numbers ;
import os ;
import path ;
import print ;
import project ;
import property ;
import regex ;
import scanner ;
import sequence ;
import stage ;
import symlink ;
import toolset ;
import type ;
import targets ;
import types/register ;
import utility ;
import virtual-target ;
import message ;
import convert ;

# Generators need the target types registered first. So this import needs
# to be after that.
import generators/__init_generators__ ;

# FIXME: the following generate module import is not needed here but removing it
# too hastily will break using code (e.g. the main Boost library Jamroot file)
# that forgot to import the generate module before calling the generate rule.
import generate ;


variant debug   : <optimization>off <debug-symbols>on <inlining>off
                  <runtime-debugging>on ;
variant release : <optimization>speed <debug-symbols>off <inlining>full
                  <runtime-debugging>off <define>NDEBUG ;
variant profile : release : <profiling>on <debug-symbols>on ;


class preprocessed-target-class : basic-target
{
    import generators ;
    rule construct ( name : sources * : property-set )
    {
        local result = [ generators.construct [ project ]
            $(name) : PREPROCESSED_CPP : $(property-set) : $(sources) ] ;
        if ! $(result)
        {
            result = [ generators.construct [ project ]
                $(name) : PREPROCESSED_C : $(property-set) : $(sources) ] ;
        }
        if ! $(result)
        {
            local s ;
            for x in $(sources)
            {
                s += [ $(x).name ] ;
            }
            local p = [ project ] ;
            errors.user-error
                "In project" [ $(p).name ] :
                "Could not construct preprocessed file \"$(name)\" from $(s:J=, )." ;
        }
        return $(result) ;
    }
}

rule preprocessed ( name : sources * : requirements * : default-build * :
    usage-requirements * )
{
    local project = [ project.current ] ;
    return [ targets.main-target-alternative
        [ new preprocessed-target-class $(name) : $(project)
            : [ targets.main-target-sources $(sources) : $(name) ]
            : [ targets.main-target-requirements $(requirements) : $(project) ]
            : [ targets.main-target-default-build $(default-build) : $(project) ]
            : [ targets.main-target-usage-requirements $(usage-requirements) : $(project) ]
        ] ] ;
}

IMPORT $(__name__) : preprocessed : : preprocessed ;