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Add result<U&, E> specialization. Fixes #72.

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This commit is contained in:
Peter Dimov
2023-09-12 03:34:24 +03:00
parent a57c568324
commit 951b3fe7b4
22 changed files with 1808 additions and 4 deletions
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test/result_move_assign.cpp
+107
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@@ -508,6 +508,8 @@ int main()
BOOST_TEST_EQ( Y::instances, 0 );
//
{
result<void> r;
result<void> r2;
@@ -600,5 +602,110 @@ int main()
BOOST_TEST_EQ( r2.error(), ec );
}
//
{
int x1 = 1;
int x2 = 2;
result<int&> r1( x1 );
result<int&> r2( x2 );
r2 = std::move( r1 );
BOOST_TEST_EQ( x1, 1 );
BOOST_TEST_EQ( x2, 2 );
BOOST_TEST( r2.has_value() );
BOOST_TEST( !r2.has_error() );
BOOST_TEST_EQ( r2.value(), 1 );
BOOST_TEST_EQ( r1, r2 );
BOOST_TEST_EQ( &*r1, &*r2 );
}
{
int x1 = 1;
result<int&> r1( x1 );
result<int&> r2( ENOENT, generic_category() );
r2 = std::move( r1 );
BOOST_TEST_EQ( x1, 1 );
BOOST_TEST( r2.has_value() );
BOOST_TEST( !r2.has_error() );
BOOST_TEST_EQ( r2.value(), 1 );
BOOST_TEST_EQ( r1, r2 );
}
{
int x1 = 1;
auto ec = make_error_code( errc::invalid_argument );
result<int&> r1( ec );
result<int&> r2( x1 );
r2 = std::move( r1 );
BOOST_TEST_EQ( x1, 1 );
BOOST_TEST( !r2.has_value() );
BOOST_TEST( r2.has_error() );
BOOST_TEST_EQ( r2.error(), ec );
}
{
int x1 = 1;
auto ec = make_error_code( errc::invalid_argument );
result<int&> r2( x1 );
r2 = result<int&>( ec );
BOOST_TEST_EQ( x1, 1 );
BOOST_TEST( !r2.has_value() );
BOOST_TEST( r2.has_error() );
BOOST_TEST_EQ( r2.error(), ec );
}
{
auto ec = make_error_code( errc::invalid_argument );
result<int&> r1( ec );
result<int&> r2( ENOENT, generic_category() );
r2 = std::move( r1 );
BOOST_TEST( !r2.has_value() );
BOOST_TEST( r2.has_error() );
BOOST_TEST_EQ( r2.error(), ec );
}
{
auto ec = make_error_code( errc::invalid_argument );
result<int&> r2( ENOENT, generic_category() );
r2 = result<int&>( ec );
BOOST_TEST( !r2.has_value() );
BOOST_TEST( r2.has_error() );
BOOST_TEST_EQ( r2.error(), ec );
}
//
return boost::report_errors();
}