03c6791dc6
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@222378 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <iterator>
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// template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17
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// template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17
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// template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17
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// template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17
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#if __cplusplus <= 201402L
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int main () {}
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#else
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#include <__config>
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#include <iterator>
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#include <cassert>
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#include <vector>
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#include <array>
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#include <initializer_list>
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template<typename C>
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void test_const_container( const C& c )
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{
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assert ( std::data(c) == c.data());
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}
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template<typename T>
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void test_const_container( const std::initializer_list<T>& c )
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{
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assert ( std::data(c) == c.begin());
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}
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template<typename C>
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void test_container( C& c )
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{
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assert ( std::data(c) == c.data());
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}
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template<typename T>
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void test_container( std::initializer_list<T>& c)
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{
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assert ( std::data(c) == c.begin());
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}
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template<typename T, size_t Sz>
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void test_const_array( const T (&array)[Sz] )
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{
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assert ( std::data(array) == &array[0]);
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}
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int main()
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{
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std::vector<int> v; v.push_back(1);
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std::array<int, 1> a; a[0] = 3;
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std::initializer_list<int> il = { 4 };
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test_container ( v );
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test_container ( a );
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test_container ( il );
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test_const_container ( v );
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test_const_container ( a );
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test_const_container ( il );
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static constexpr int arrA [] { 1, 2, 3 };
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test_const_array ( arrA );
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}
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#endif
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