Method eval

source/ast/builtins/ArrayMethods.cpp:738–760

    }

    ConstantValue eval(EvalContext& context, const Args& args, SourceRange,
                       const CallExpression::SystemCallInfo&) const final {
        auto lval = args[0]->evalLValue(context);
        if (!lval)
            return nullptr;

        auto target = lval.resolve();
        SLANG_ASSERT(target && target->isQueue());

        auto& q = *target->queue();
        if (q.empty()) {
            context.addDiag(diag::ConstEvalEmptyQueue, args[0]->sourceRange);
            return args[0]->type->getArrayElementType()->getDefaultValue();
        }

        ConstantValue result = front ? std::move(q.front()) : std::move(q.back());
        if (front)
            q.pop_front();
        else
            q.pop_back();

        return result;
    }

private:
    bool front;