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Add SFINAE conditions

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This commit is contained in:
Peter Dimov
2017-05-31 07:42:45 +03:00
parent abb7b551cc
commit 7d25e131be
6 changed files with 115 additions and 21 deletions
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8
test/variant_default_construct.cpp
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@@ -20,6 +20,11 @@ struct X
X();
};
struct Y
{
Y() = delete;
};
int main()
{
{
@@ -89,6 +94,9 @@ int main()
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X>>));
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int>>));
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_default_constructible<variant<int, Y>>));
BOOST_TEST_TRAIT_FALSE((std::is_default_constructible<variant<Y, int>>));
}
return boost::report_errors();