Statement* Expand::operator()(Extension* e)
{
Selector_List* extender = static_cast<Selector_List*>(selector_stack.back());
if (!extender) return 0;
Selector_List* extendee = static_cast<Selector_List*>(e->selector()->perform(contextualize->with(0, env, backtrace)));
if (extendee->length() != 1) {
error("selector groups may not be extended", extendee->path(), extendee->line(), backtrace);
}
Complex_Selector* c = (*extendee)[0];
if (!c->head() || c->tail()) {
error("nested selectors may not be extended", c->path(), c->line(), backtrace);
}
Compound_Selector* s = c->head();
for (size_t i = 0, L = extender->length(); i < L; ++i) {
extensions.insert(make_pair(*s, (*extender)[i]));
To_String to_string;
}
return 0;
}
