LWG Issue 2128: Implement global cbegin/rbegin/cend/rbegin

llvm-svn: 189634

1 files changed, 125 insertions, 0 deletions

diff --git a/libcxx/test/iterators/iterator.range/begin-end.pass.cpp b/libcxx/test/iterators/iterator.range/begin-end.pass.cpp
new file mode 100644
index 00000000000..e8a6c18fd49
--- /dev/null
+++ b/libcxx/test/iterators/iterator.range/begin-end.pass.cpp
@@ -0,0 +1,125 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <iterator>
+// template <class C> auto begin(C& c) -> decltype(c.begin());
+// template <class C> auto begin(const C& c) -> decltype(c.begin());
+// template <class C> auto end(C& c) -> decltype(c.end());
+// template <class C> auto end(const C& c) -> decltype(c.end());
+// template <class E> reverse_iterator<const E*> rbegin(initializer_list<E> il);
+// template <class E> reverse_iterator<const E*> rend(initializer_list<E> il);
+
+#include <__config>
+
+#if __cplusplus >= 201103L
+#include <iterator>
+#include <cassert>
+#include <vector>
+#include <array>
+#include <list>
+#include <initializer_list>
+
+template<typename C>
+void test_const_container( const C & c, typename C::value_type val ) {
+    assert ( std::begin(c)   == c.begin());
+    assert (*std::begin(c)   ==  val );
+    assert ( std::begin(c)   != c.end());
+    assert ( std::end(c)     == c.end());
+#if _LIBCPP_STD_VER > 11
+    assert ( std::cbegin(c)  == c.cbegin());
+    assert ( std::cbegin(c)  != c.cend());
+    assert ( std::cend(c)    == c.cend());
+    assert ( std::rbegin(c)  == c.rbegin());
+    assert ( std::rbegin(c)  != c.rend());
+    assert ( std::rend(c)    == c.rend());
+    assert ( std::crbegin(c) == c.crbegin());
+    assert ( std::crbegin(c) != c.crend());
+    assert ( std::crend(c)   == c.crend());
+#endif
+    }
+
+template<typename T>
+void test_const_container( const std::initializer_list<T> & c, T val ) {
+    assert ( std::begin(c)   == c.begin());
+    assert (*std::begin(c)   ==  val );
+    assert ( std::begin(c)   != c.end());
+    assert ( std::end(c)     == c.end());
+#if _LIBCPP_STD_VER > 11
+//  initializer_list doesn't have cbegin/cend/rbegin/rend
+//     assert ( std::cbegin(c)  == c.cbegin());
+//     assert ( std::cbegin(c)  != c.cend());
+//     assert ( std::cend(c)    == c.cend());
+//     assert ( std::rbegin(c)  == c.rbegin());
+//     assert ( std::rbegin(c)  != c.rend());
+//     assert ( std::rend(c)    == c.rend());
+//     assert ( std::crbegin(c) == c.crbegin());
+//     assert ( std::crbegin(c) != c.crend());
+//     assert ( std::crend(c)   == c.crend());
+#endif
+    }
+
+template<typename C>
+void test_container( C & c, typename C::value_type val ) {
+    assert ( std::begin(c)   == c.begin());
+    assert (*std::begin(c)   ==  val );
+    assert ( std::begin(c)   != c.end());
+    assert ( std::end(c)     == c.end());
+#if _LIBCPP_STD_VER > 11
+    assert ( std::cbegin(c)  == c.cbegin());
+    assert ( std::cbegin(c)  != c.cend());
+    assert ( std::cend(c)    == c.cend());
+    assert ( std::rbegin(c)  == c.rbegin());
+    assert ( std::rbegin(c)  != c.rend());
+    assert ( std::rend(c)    == c.rend());
+    assert ( std::crbegin(c) == c.crbegin());
+    assert ( std::crbegin(c) != c.crend());
+    assert ( std::crend(c)   == c.crend());
+#endif
+    }
+    
+template<typename T>
+void test_container( std::initializer_list<T> & c, T val ) {
+    assert ( std::begin(c)   == c.begin());
+    assert (*std::begin(c)   ==  val );
+    assert ( std::begin(c)   != c.end());
+    assert ( std::end(c)     == c.end());
+#if _LIBCPP_STD_VER > 11
+//  initializer_list doesn't have cbegin/cend/rbegin/rend
+//     assert ( std::cbegin(c)  == c.cbegin());
+//     assert ( std::cbegin(c)  != c.cend());
+//     assert ( std::cend(c)    == c.cend());
+//     assert ( std::rbegin(c)  == c.rbegin());
+//     assert ( std::rbegin(c)  != c.rend());
+//     assert ( std::rend(c)    == c.rend());
+//     assert ( std::crbegin(c) == c.crbegin());
+//     assert ( std::crbegin(c) != c.crend());
+//     assert ( std::crend(c)   == c.crend());
+#endif
+    }
+
+int main(){
+    std::vector<int> v; v.push_back(1);
+    std::list<int> l;   l.push_back(2);
+    std::array<int, 1> a; a[0] = 3;
+    std::initializer_list<int> il = { 4 };
+    
+    test_container ( v, 1 );
+    test_container ( l, 2 );
+    test_container ( a, 3 );
+    test_container ( il, 4 );
+
+    test_const_container ( v, 1 );
+    test_const_container ( l, 2 );
+    test_const_container ( a, 3 );
+    test_const_container ( il, 4 );
+}
+
+#else
+int main(){}
+#endif