Class lhs_expression

test/include/test.hpp:283–319

template <class T, class Operator>
struct lhs_expression
{
    T lhs;
    explicit lhs_expression(T e) : lhs(std::move(e)) {}

    friend std::ostream& operator<<(std::ostream& s, const lhs_expression& self)
    {
        std::string op = Operator::as_string();
        if(not op.empty())
            s << Operator::as_string() << " ";
        print_stream(s, self.lhs);
        return s;
    }

    friend decltype(auto) get_value(const lhs_expression& e) { return e.value(); }

    decltype(auto) value() const { return Operator::call(get_value(lhs)); }

    TEST_FOREACH_BINARY_OPERATORS(TEST_EXPR_BINARY_OPERATOR)
    TEST_FOREACH_UNARY_OPERATORS(TEST_EXPR_UNARY_OPERATOR)

// NOLINTNEXTLINE
#define TEST_LHS_REOPERATOR(op)                 \
    template <class U>                          \
    auto operator op(const U& rhs) const        \
    {                                           \
        return make_lhs_expression(lhs op rhs); \
    }
    TEST_LHS_REOPERATOR(+)
    TEST_LHS_REOPERATOR(-)
    TEST_LHS_REOPERATOR(*)
    TEST_LHS_REOPERATOR(/)
    TEST_LHS_REOPERATOR(%)
    TEST_LHS_REOPERATOR(&)
    TEST_LHS_REOPERATOR(|)
    TEST_LHS_REOPERATOR(^)
};

template <class F>
struct predicate