void CCodeGenerator::operator()(Construct* expr) {
// Look up the function by name in the current context.
String::Ptr id = env_->name("@init");
Class::Ptr clazz = expr->type()->clazz();
Function::Ptr func = clazz->function(id);
std::vector<Operand> args;
for (Expression::Ptr a = expr->arguments(); a; a = a->next()) {
args.push_back(emit(a));
}
return_ = alloc_temp(clazz->type());
out_ << func->label() << "(";
Formal::Ptr formal = func->formals();
Expression::Ptr arg = expr->arguments();
for (int i = 0; i < args.size(); i++) {
if(!formal->is_self() && !formal->type()->equals(arg->type())) {
// Cast to the appropriate C-type, since C doesn't know anything
// about subtypes, etc..
out_ << "(";
operator()(formal->type());
out_ << ")";
}
out_ << args[i];
if (i < args.size() - 1) {
out_ << ", ";
}
formal = formal->next();
arg = arg->next();
}
out_ << ");\n";
}
void
CodeExpander::functor(Class* clazz) {
// Generate the @call method for the functor, which contains a switch on
// the type of the arugment passed to @call method.
Function::Ptr func = clazz->function(env_->name("@call"));
Location loc = clazz->location();
String::Ptr fn = func->formals()->next()->name();
IdentifierRef::Ptr guard(new IdentifierRef(loc, env_->name(""), fn));
Expression::Ptr stmt;
for (Feature::Ptr feat = clazz->features(); feat; feat = feat->next()) {
if (Function* func = dynamic_cast<Function*>(feat.pointer())) {
String* nm = func->name();
if (nm->string().find("@case") == 0) {
// This is a functor case, so generate a branch for it. Each
// branch looks like this: self.@case_Type(obj)
Type::Ptr type = func->formals()->next()->type();
Expression::Ptr arg0(new IdentifierRef(loc, env_->name(""), env_->name("__self")));
Expression::Ptr arg1(new Cast(loc, type, new IdentifierRef(loc, env_->name(""), fn)));
arg0->type(func->formals()->type());
arg1->type(func->formals()->next()->type());
Expression::Ptr arg;
arg = append(arg.pointer(), arg0.pointer());
arg = append(arg.pointer(), arg1.pointer());
IdentifierRef::Ptr id(new IdentifierRef(loc, env_->name(""), nm));
Call::Ptr expr(new Call(loc, id, arg));
expr->function(func);
Is::Ptr is(new Is(loc, guard, type));
stmt = new Conditional(loc, is, expr, stmt);
}
}
}
Block::Ptr block = new Block(loc, env_->string(""), stmt);
func->block(block);
func->is_checked(false);
semant_->operator()(func);
}