BOOST_TEST_DONT_PRINT_LOG_VALUE(type) instructs the test framework to ignore values of type type when constructing diagnostic messages. It does this by defining an empty implementation of a print function specialized for type. Because the specialization is inside an implementation namespace for Boost.Test, the macro must be invoked at the global namespace scope. Therefore, it cannot be used inside a test suite or any other namespace.

Example

struct custom
{
    int value;
};

BOOST_TEST_DONT_PRINT_LOG_VALUE(custom);

static bool operator==(custom const& expected, custom const& actual)
{
    return expected.value == actual.value;
}

BOOST_AUTO_TEST_CASE(example_test_dont_print_log_value)
{
    custom const v1 = { 1 };
    custom const v2 = { 1 };
    BOOST_REQUIRE_EQUAL(v1, v2);
}