@template
def Template(foo, bar=[]):
    SOURCES += foo
    DIRS += bar

@template
def TemplateError(foo):
    ILLEGAL = foo

@template
def TemplateGlobalVariable():
    SOURCES += illegal

@template
def TemplateGlobalUPPERVariable():
    SOURCES += DIRS

@template
def TemplateInherit(foo):
    USE_LIBS += ['foo']
    Template(foo)