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Fix #12563

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This commit is contained in:
Andrzej Krzemienski
2016-11-19 14:57:40 +01:00
parent 8d69e99e78
commit 7ea2ca6c40
3 changed files with 50 additions and 7 deletions
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26
test/optional_test_convert_from_T.cpp
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@ -23,6 +23,29 @@
using boost::optional;
using boost::none;
template <typename U>
struct superconv
{
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template <typename T>
superconv(T&&) { BOOST_STATIC_ASSERT(sizeof(T) == 0); }
#else
template <typename T>
superconv(const T&) { BOOST_STATIC_ASSERT(sizeof(T) == 0); }
template <typename T>
superconv( T&) { BOOST_STATIC_ASSERT(sizeof(T) == 0); }
#endif
superconv() {}
};
void test_optional_of_superconverting_T() // compile-time test
{
superconv<optional<int> > s;
superconv<optional<int> > & rs = s;
optional<superconv<optional<int> > > os = rs;
}
void test_optional_optional_T()
{
optional<int> oi1 (1), oiN;
@ -39,6 +62,7 @@ void test_optional_optional_T()
int main()
{
test_optional_optional_T();
test_optional_of_superconverting_T();
return boost::report_errors();
}