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begin-end.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
// XFAIL: c++98, c++03
// <cuda/std/iterator>
// template <class C> constexpr auto begin(C& c) -> decltype(c.begin());
// template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());
// template <class C> constexpr auto cbegin(const C& c) -> decltype(cuda::std::begin(c)); // C++14
// template <class C> constexpr auto cend(const C& c) -> decltype(cuda::std::end(c)); // C++14
// template <class C> constexpr auto end (C& c) -> decltype(c.end());
// template <class C> constexpr auto end (const C& c) -> decltype(c.end());
// template <class E> constexpr reverse_iterator<const E*> rbegin(initializer_list<E> il);
// template <class E> constexpr reverse_iterator<const E*> rend (initializer_list<E> il);
//
// template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14
// template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14
// template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14
// template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14
// template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14
// template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14
// template <class C> constexpr auto crbegin(const C& c) -> decltype(cuda::std::rbegin(c)); // C++14
// template <class C> constexpr auto crend(const C& c) -> decltype(cuda::std::rend(c)); // C++14
//
// All of these are constexpr in C++17
#include <cuda/std/iterator>
#include <cuda/std/cassert>
#if defined(_LIBCUDACXX_HAS_VECTOR)
#include <cuda/std/vector>
#endif
#include <cuda/std/array>
#if defined(_LIBCUDACXX_HAS_LIST)
#include <cuda/std/list>
#endif
#include <cuda/std/initializer_list>
#include "test_macros.h"
// cuda::std::array is explicitly allowed to be initialized with A a = { init-list };.
// Disable the missing braces warning for this reason.
#include "disable_missing_braces_warning.h"
template<typename C>
__host__ __device__
void test_const_container( const C & c, typename C::value_type val ) {
assert ( cuda::std::begin(c) == c.begin());
assert (*cuda::std::begin(c) == val );
assert ( cuda::std::begin(c) != c.end());
assert ( cuda::std::end(c) == c.end());
#if TEST_STD_VER > 11
assert ( cuda::std::cbegin(c) == c.cbegin());
assert ( cuda::std::cbegin(c) != c.cend());
assert ( cuda::std::cend(c) == c.cend());
assert ( cuda::std::rbegin(c) == c.rbegin());
assert ( cuda::std::rbegin(c) != c.rend());
assert ( cuda::std::rend(c) == c.rend());
assert ( cuda::std::crbegin(c) == c.crbegin());
assert ( cuda::std::crbegin(c) != c.crend());
assert ( cuda::std::crend(c) == c.crend());
#endif
}
template<typename T>
__host__ __device__
void test_const_container( const cuda::std::initializer_list<T> & c, T val ) {
assert ( cuda::std::begin(c) == c.begin());
assert (*cuda::std::begin(c) == val );
assert ( cuda::std::begin(c) != c.end());
assert ( cuda::std::end(c) == c.end());
#if TEST_STD_VER > 11
// initializer_list doesn't have cbegin/cend/rbegin/rend
// but cuda::std::cbegin(),etc work (b/c they're general fn templates)
// assert ( cuda::std::cbegin(c) == c.cbegin());
// assert ( cuda::std::cbegin(c) != c.cend());
// assert ( cuda::std::cend(c) == c.cend());
// assert ( cuda::std::rbegin(c) == c.rbegin());
// assert ( cuda::std::rbegin(c) != c.rend());
// assert ( cuda::std::rend(c) == c.rend());
// assert ( cuda::std::crbegin(c) == c.crbegin());
// assert ( cuda::std::crbegin(c) != c.crend());
// assert ( cuda::std::crend(c) == c.crend());
#endif
}
template<typename C>
__host__ __device__
void test_container( C & c, typename C::value_type val ) {
assert ( cuda::std::begin(c) == c.begin());
assert (*cuda::std::begin(c) == val );
assert ( cuda::std::begin(c) != c.end());
assert ( cuda::std::end(c) == c.end());
#if TEST_STD_VER > 11
assert ( cuda::std::cbegin(c) == c.cbegin());
assert ( cuda::std::cbegin(c) != c.cend());
assert ( cuda::std::cend(c) == c.cend());
assert ( cuda::std::rbegin(c) == c.rbegin());
assert ( cuda::std::rbegin(c) != c.rend());
assert ( cuda::std::rend(c) == c.rend());
assert ( cuda::std::crbegin(c) == c.crbegin());
assert ( cuda::std::crbegin(c) != c.crend());
assert ( cuda::std::crend(c) == c.crend());
#endif
}
template<typename T>
__host__ __device__
void test_container( cuda::std::initializer_list<T> & c, T val ) {
assert ( cuda::std::begin(c) == c.begin());
assert (*cuda::std::begin(c) == val );
assert ( cuda::std::begin(c) != c.end());
assert ( cuda::std::end(c) == c.end());
#if TEST_STD_VER > 11
// initializer_list doesn't have cbegin/cend/rbegin/rend
// assert ( cuda::std::cbegin(c) == c.cbegin());
// assert ( cuda::std::cbegin(c) != c.cend());
// assert ( cuda::std::cend(c) == c.cend());
// assert ( cuda::std::rbegin(c) == c.rbegin());
// assert ( cuda::std::rbegin(c) != c.rend());
// assert ( cuda::std::rend(c) == c.rend());
// assert ( cuda::std::crbegin(c) == c.crbegin());
// assert ( cuda::std::crbegin(c) != c.crend());
// assert ( cuda::std::crend(c) == c.crend());
#endif
}
template<typename T, size_t Sz>
__host__ __device__
void test_const_array( const T (&array)[Sz] ) {
assert ( cuda::std::begin(array) == array );
assert (*cuda::std::begin(array) == array[0] );
assert ( cuda::std::begin(array) != cuda::std::end(array));
assert ( cuda::std::end(array) == array + Sz);
#if TEST_STD_VER > 11
assert ( cuda::std::cbegin(array) == array );
assert (*cuda::std::cbegin(array) == array[0] );
assert ( cuda::std::cbegin(array) != cuda::std::cend(array));
assert ( cuda::std::cend(array) == array + Sz);
#endif
}
STATIC_TEST_GLOBAL_VAR TEST_CONSTEXPR_GLOBAL int global_array [] { 1, 2, 3 };
#if TEST_STD_VER > 14
#if !defined(TEST_COMPILER_CUDACC_BELOW_11_3)
STATIC_TEST_GLOBAL_VAR TEST_CONSTEXPR_GLOBAL int global_const_array[] = {0,1,2,3,4};
#endif // nvcc > 11.2
#endif // TEST_STD_VER > 14
int main(int, char**) {
#if defined(_LIBCUDACXX_HAS_VECTOR)
cuda::std::vector<int> v; v.push_back(1);
#endif
#if defined(_LIBCUDACXX_HAS_LIST)
cuda::std::list<int> l; l.push_back(2);
#endif
cuda::std::array<int, 1> a; a[0] = 3;
cuda::std::initializer_list<int> il = { 4 };
#if defined(_LIBCUDACXX_HAS_VECTOR)
test_container ( v, 1 );
#endif
#if defined(_LIBCUDACXX_HAS_LIST)
test_container ( l, 2 );
#endif
test_container ( a, 3 );
test_container ( il, 4 );
#if defined(_LIBCUDACXX_HAS_VECTOR)
test_const_container ( v, 1 );
#endif
#if defined(_LIBCUDACXX_HAS_LIST)
test_const_container ( l, 2 );
#endif
test_const_container ( a, 3 );
test_const_container ( il, 4 );
test_const_array ( global_array );
#if TEST_STD_VER > 11
constexpr const int *b = cuda::std::cbegin(global_array);
constexpr const int *e = cuda::std::cend(global_array);
static_assert(e - b == 3, "");
#endif
#if TEST_STD_VER > 14
{
typedef cuda::std::array<int, 5> C;
constexpr const C local_const_array{0,1,2,3,4};
static_assert ( local_const_array.begin() == cuda::std::begin(local_const_array), "");
static_assert ( local_const_array.cbegin() == cuda::std::cbegin(local_const_array), "");
static_assert ( local_const_array.end() == cuda::std::end(local_const_array), "");
static_assert ( local_const_array.cend() == cuda::std::cend(local_const_array), "");
static_assert ( local_const_array.rbegin() == cuda::std::rbegin(local_const_array), "");
static_assert ( local_const_array.crbegin() == cuda::std::crbegin(local_const_array), "");
static_assert ( local_const_array.rend() == cuda::std::rend(local_const_array), "");
static_assert ( local_const_array.crend() == cuda::std::crend(local_const_array), "");
static_assert ( cuda::std::begin(local_const_array) != cuda::std::end(local_const_array), "");
static_assert ( cuda::std::rbegin(local_const_array) != cuda::std::rend(local_const_array), "");
static_assert ( cuda::std::cbegin(local_const_array) != cuda::std::cend(local_const_array), "");
static_assert ( cuda::std::crbegin(local_const_array) != cuda::std::crend(local_const_array), "");
static_assert ( *local_const_array.begin() == 0, "");
static_assert ( *local_const_array.rbegin() == 4, "");
static_assert ( *cuda::std::begin(local_const_array) == 0, "" );
static_assert ( *cuda::std::cbegin(local_const_array) == 0, "" );
static_assert ( *cuda::std::rbegin(local_const_array) == 4, "" );
static_assert ( *cuda::std::crbegin(local_const_array) == 4, "" );
}
#if !defined(TEST_COMPILER_CUDACC_BELOW_11_3)
{
static_assert ( *cuda::std::begin(global_const_array) == 0, "" );
static_assert ( *cuda::std::cbegin(global_const_array) == 0, "" );
static_assert ( *cuda::std::rbegin(global_const_array) == 4, "" );
static_assert ( *cuda::std::crbegin(global_const_array) == 4, "" );
}
#endif // nvcc > 11.2
#endif // TEST_STD_VER > 14
return 0;
}