JSValue *evaluate(Scope *scope) {
JSValue *lhsValue = lhs->evaluate(scope);
if (lhsValue->jsType() == JSExternalFunctionType) {
vector<JSValue *> args;
for (JSExpression *x: rhs) {
args.push_back(x->evaluate(scope));
}
JSExternalFunctionImplementation implementation = ((JSExternalFunction *) lhsValue)->getImplementation();
return implementation(args);
}
else if (lhsValue->jsType() == JSFunctionType) {
JSFunction *functionValue = (JSFunction *) lhsValue;
Scope *newScope = new Scope(scope);
for (int i = 0; i < functionValue->getArgNames().size(); i++) {
newScope->declareValue(functionValue->getArgNames()[i], rhs[i]->evaluate(scope));
}
JSValue *result = interpretBlock(functionValue->getStatements(), newScope);
return (result == nullptr) ? jsUndefined : result;
}
else {
cout << "trying to call " << lhsValue->toString() << ", which can't be called :(" << endl;
exit(123);
}
}
