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Add a converting constructor to result<void>

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This commit is contained in:
Peter Dimov
2023-09-12 04:48:45 +03:00
parent 951b3fe7b4
commit c360ff1b1c
2 changed files with 81 additions and 0 deletions
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test/result_convert_construct.cpp
+64
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@@ -183,6 +183,67 @@ int main()
//
{
result<void, int> r;
result<void, X> r2 = r;
BOOST_TEST( r2 );
BOOST_TEST_EQ( X::instances, 0 );
}
BOOST_TEST_EQ( X::instances, 0 );
{
result<void, int> const r;
result<void, X> r2 = r;
BOOST_TEST( r2 );
BOOST_TEST_EQ( X::instances, 0 );
}
BOOST_TEST_EQ( X::instances, 0 );
{
result<void, X> r2 = result<void, int>();
BOOST_TEST( r2 );
BOOST_TEST_EQ( X::instances, 0 );
}
BOOST_TEST_EQ( X::instances, 0 );
{
result<void, int> r( 5 );
result<void, X> r2 = r;
BOOST_TEST( !r2 );
BOOST_TEST_EQ( r2.error(), X(5) );
BOOST_TEST_EQ( X::instances, 1 );
}
BOOST_TEST_EQ( X::instances, 0 );
{
result<void, int> const r( 6 );
result<void, X> r2 = r;
BOOST_TEST( !r2 );
BOOST_TEST_EQ( r2.error(), X(6) );
BOOST_TEST_EQ( X::instances, 1 );
}
{
result<void, X> r2 = result<void, int>( 7 );
BOOST_TEST( !r2 );
BOOST_TEST_EQ( r2.error(), X(7) );
BOOST_TEST_EQ( X::instances, 1 );
}
BOOST_TEST_EQ( X::instances, 0 );
//
{
int x = 5;
@@ -225,6 +286,9 @@ int main()
BOOST_TEST_TRAIT_FALSE((std::is_constructible<result<int, void*>, result<int, int>>));
BOOST_TEST_TRAIT_FALSE((std::is_convertible<result<int, int>, result<int, void*>>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<result<void, void*>, result<void, int>>));
BOOST_TEST_TRAIT_FALSE((std::is_convertible<result<void, int>, result<void, void*>>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<result<int const&>, result<int&>>));
BOOST_TEST_TRAIT_TRUE((std::is_convertible<result<int&>, result<int const&>>));