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Unify behavior of is_copy_constructible triat when dealing with rvalues + add comments for some tests (refs #8802):

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[SVN r85104]
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Antony Polukhin committed 2013-07-22 12:51:09 +00:00
1 parent adfe8642af
commit 2429f259cc
2 files changed
+24 -5
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test/is_copy_constructible_test.cpp
+18 -2
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@@ -259,11 +259,27 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_copy_constructible<enum_UDT>::value, true
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int&>::value, true);
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int&&>::value, false);
// Code like `int&& a = 10;` or
// struct nonc {
// nonc() = default;
// nonc(const nonc&) = delete;
// nonc(nonc&&) = delete;
// nonc& operator=(const nonc&) = delete;
// nonc& operator=(nonc&&) = delete;
// };
//
// nonc && a = nonc();
// is legal in C++11. so this trait MUST return true.
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int&&>::value, true);
#endif
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_copy_constructible<const int&>::value, true);
// Following three tests may give different results because of copiler and C++03/C++11
// Following three tests may give different results because of compiler and C++03/C++11.
// On C++11 compiler following code:
// int c[2][4][5][6][3];
// int b[2][4][5][6][3] = std::move(c);
// does not compile, so we expect `false` to be the result of those three tests.
BOOST_CHECK_SOFT_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int[2]>::value, false, true);
BOOST_CHECK_SOFT_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int[3][2]>::value, false, true);
BOOST_CHECK_SOFT_INTEGRAL_CONSTANT(::tt::is_copy_constructible<int[2][4][5][6][3]>::value, false, true);