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7c3769df62
to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@351648 91177308-0d34-0410-b5e6-96231b3b80d8
201 lines
7.7 KiB
C++
201 lines
7.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// XFAIL: c++98, c++03
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// <iterator>
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// template <class C> constexpr auto begin(C& c) -> decltype(c.begin());
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// template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());
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// template <class C> constexpr auto cbegin(const C& c) -> decltype(std::begin(c)); // C++14
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// template <class C> constexpr auto cend(const C& c) -> decltype(std::end(c)); // C++14
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// template <class C> constexpr auto end (C& c) -> decltype(c.end());
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// template <class C> constexpr auto end (const C& c) -> decltype(c.end());
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// template <class E> constexpr reverse_iterator<const E*> rbegin(initializer_list<E> il);
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// template <class E> constexpr reverse_iterator<const E*> rend (initializer_list<E> il);
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//
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// template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14
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// template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14
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// template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14
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// template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14
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// template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14
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// template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14
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// template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14
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// template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14
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//
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// All of these are constexpr in C++17
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#include "test_macros.h"
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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 <list>
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#include <initializer_list>
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// std::array is explicitly allowed to be initialized with A a = { init-list };.
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// Disable the missing braces warning for this reason.
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#include "disable_missing_braces_warning.h"
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template<typename C>
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void test_const_container( const C & c, typename C::value_type val ) {
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assert ( std::begin(c) == c.begin());
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assert (*std::begin(c) == val );
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assert ( std::begin(c) != c.end());
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assert ( std::end(c) == c.end());
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#if TEST_STD_VER > 11
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assert ( std::cbegin(c) == c.cbegin());
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assert ( std::cbegin(c) != c.cend());
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assert ( std::cend(c) == c.cend());
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assert ( std::rbegin(c) == c.rbegin());
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assert ( std::rbegin(c) != c.rend());
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assert ( std::rend(c) == c.rend());
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assert ( std::crbegin(c) == c.crbegin());
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assert ( std::crbegin(c) != c.crend());
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assert ( std::crend(c) == c.crend());
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#endif
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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, T val ) {
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assert ( std::begin(c) == c.begin());
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assert (*std::begin(c) == val );
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assert ( std::begin(c) != c.end());
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assert ( std::end(c) == c.end());
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#if TEST_STD_VER > 11
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// initializer_list doesn't have cbegin/cend/rbegin/rend
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// but std::cbegin(),etc work (b/c they're general fn templates)
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// assert ( std::cbegin(c) == c.cbegin());
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// assert ( std::cbegin(c) != c.cend());
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// assert ( std::cend(c) == c.cend());
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// assert ( std::rbegin(c) == c.rbegin());
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// assert ( std::rbegin(c) != c.rend());
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// assert ( std::rend(c) == c.rend());
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// assert ( std::crbegin(c) == c.crbegin());
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// assert ( std::crbegin(c) != c.crend());
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// assert ( std::crend(c) == c.crend());
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#endif
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}
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template<typename C>
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void test_container( C & c, typename C::value_type val ) {
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assert ( std::begin(c) == c.begin());
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assert (*std::begin(c) == val );
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assert ( std::begin(c) != c.end());
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assert ( std::end(c) == c.end());
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#if TEST_STD_VER > 11
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assert ( std::cbegin(c) == c.cbegin());
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assert ( std::cbegin(c) != c.cend());
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assert ( std::cend(c) == c.cend());
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assert ( std::rbegin(c) == c.rbegin());
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assert ( std::rbegin(c) != c.rend());
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assert ( std::rend(c) == c.rend());
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assert ( std::crbegin(c) == c.crbegin());
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assert ( std::crbegin(c) != c.crend());
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assert ( std::crend(c) == c.crend());
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#endif
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}
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template<typename T>
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void test_container( std::initializer_list<T> & c, T val ) {
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assert ( std::begin(c) == c.begin());
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assert (*std::begin(c) == val );
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assert ( std::begin(c) != c.end());
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assert ( std::end(c) == c.end());
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#if TEST_STD_VER > 11
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// initializer_list doesn't have cbegin/cend/rbegin/rend
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// assert ( std::cbegin(c) == c.cbegin());
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// assert ( std::cbegin(c) != c.cend());
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// assert ( std::cend(c) == c.cend());
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// assert ( std::rbegin(c) == c.rbegin());
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// assert ( std::rbegin(c) != c.rend());
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// assert ( std::rend(c) == c.rend());
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// assert ( std::crbegin(c) == c.crbegin());
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// assert ( std::crbegin(c) != c.crend());
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// assert ( std::crend(c) == c.crend());
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#endif
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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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assert ( std::begin(array) == array );
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assert (*std::begin(array) == array[0] );
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assert ( std::begin(array) != std::end(array));
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assert ( std::end(array) == array + Sz);
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#if TEST_STD_VER > 11
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assert ( std::cbegin(array) == array );
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assert (*std::cbegin(array) == array[0] );
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assert ( std::cbegin(array) != std::cend(array));
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assert ( std::cend(array) == array + Sz);
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#endif
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}
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int main(){
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std::vector<int> v; v.push_back(1);
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std::list<int> l; l.push_back(2);
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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, 1 );
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test_container ( l, 2 );
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test_container ( a, 3 );
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test_container ( il, 4 );
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test_const_container ( v, 1 );
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test_const_container ( l, 2 );
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test_const_container ( a, 3 );
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test_const_container ( il, 4 );
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static constexpr int arrA [] { 1, 2, 3 };
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test_const_array ( arrA );
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#if TEST_STD_VER > 11
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constexpr const int *b = std::cbegin(arrA);
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constexpr const int *e = std::cend(arrA);
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static_assert(e - b == 3, "");
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#endif
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#if TEST_STD_VER > 14
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{
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typedef std::array<int, 5> C;
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constexpr const C c{0,1,2,3,4};
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static_assert ( c.begin() == std::begin(c), "");
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static_assert ( c.cbegin() == std::cbegin(c), "");
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static_assert ( c.end() == std::end(c), "");
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static_assert ( c.cend() == std::cend(c), "");
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static_assert ( c.rbegin() == std::rbegin(c), "");
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static_assert ( c.crbegin() == std::crbegin(c), "");
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static_assert ( c.rend() == std::rend(c), "");
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static_assert ( c.crend() == std::crend(c), "");
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static_assert ( std::begin(c) != std::end(c), "");
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static_assert ( std::rbegin(c) != std::rend(c), "");
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static_assert ( std::cbegin(c) != std::cend(c), "");
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static_assert ( std::crbegin(c) != std::crend(c), "");
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static_assert ( *c.begin() == 0, "");
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static_assert ( *c.rbegin() == 4, "");
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static_assert ( *std::begin(c) == 0, "" );
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static_assert ( *std::cbegin(c) == 0, "" );
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static_assert ( *std::rbegin(c) == 4, "" );
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static_assert ( *std::crbegin(c) == 4, "" );
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}
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{
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static constexpr const int c[] = {0,1,2,3,4};
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static_assert ( *std::begin(c) == 0, "" );
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static_assert ( *std::cbegin(c) == 0, "" );
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static_assert ( *std::rbegin(c) == 4, "" );
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static_assert ( *std::crbegin(c) == 4, "" );
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}
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#endif
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}
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