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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_emplace.cpp
+42
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@@ -172,5 +172,47 @@ int main()
BOOST_TEST_EQ( Y::instances, 0 );
}
{
int x1 = 1;
result<int&> r( x1 );
BOOST_TEST( r.has_value() );
BOOST_TEST_EQ( r.value(), 1 );
int x2 = 2;
r.emplace( x2 );
BOOST_TEST( r.has_value() );
BOOST_TEST_EQ( r.value(), 2 );
}
{
result<int&> r( ENOENT, generic_category() );
BOOST_TEST( !r.has_value() );
int x2 = 2;
r.emplace( x2 );
BOOST_TEST( r.has_value() );
BOOST_TEST_EQ( r.value(), 2 );
}
BOOST_TEST_EQ( Y::instances, 0 );
{
result<int&, Y> r( in_place_error );
BOOST_TEST( !r.has_value() );
BOOST_TEST_EQ( Y::instances, 1 );
int x2 = 2;
r.emplace( x2 );
BOOST_TEST( r.has_value() );
BOOST_TEST_EQ( *r, 2 );
BOOST_TEST_EQ( Y::instances, 0 );
}
return boost::report_errors();
}