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Implement deduction guides for forward_list
llvm-svn: 332811
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libcxx/test/std/containers/sequences/forwardlist/forwardlist.cons/deduct.fail.cpp
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//===----------------------------------------------------------------------===// | ||
// | ||
// 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. | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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// <forward_list> | ||
// UNSUPPORTED: c++98, c++03, c++11, c++14 | ||
// UNSUPPORTED: libcpp-no-deduction-guides | ||
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// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> | ||
// forward_list(InputIterator, InputIterator, Allocator = Allocator()) | ||
// -> forward_list<typename iterator_traits<InputIterator>::value_type, Allocator>; | ||
// | ||
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#include <forward_list> | ||
#include <iterator> | ||
#include <cassert> | ||
#include <cstddef> | ||
#include <climits> // INT_MAX | ||
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struct A {}; | ||
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int main() | ||
{ | ||
// Test the explicit deduction guides | ||
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// Test the implicit deduction guides | ||
{ | ||
// forward_list (allocator &) | ||
std::forward_list fwl((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'forward_list'}} | ||
// Note: The extra parens are necessary, since otherwise clang decides it is a function declaration. | ||
// Also, we can't use {} instead of parens, because that constructs a | ||
// forward_list<allocator<int>, allocator<allocator<int>>> | ||
} | ||
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} |
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libcxx/test/std/containers/sequences/forwardlist/forwardlist.cons/deduct.pass.cpp
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//===----------------------------------------------------------------------===// | ||
// | ||
// 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. | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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// <forward_list> | ||
// UNSUPPORTED: c++98, c++03, c++11, c++14 | ||
// UNSUPPORTED: libcpp-no-deduction-guides | ||
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// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> | ||
// deque(InputIterator, InputIterator, Allocator = Allocator()) | ||
// -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>; | ||
// | ||
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#include <forward_list> | ||
#include <iterator> | ||
#include <cassert> | ||
#include <cstddef> | ||
#include <climits> // INT_MAX | ||
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#include "test_macros.h" | ||
#include "test_iterators.h" | ||
#include "test_allocator.h" | ||
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struct A {}; | ||
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int main() | ||
{ | ||
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// Test the explicit deduction guides | ||
{ | ||
const int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; | ||
std::forward_list fwl(std::begin(arr), std::end(arr)); | ||
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static_assert(std::is_same_v<decltype(fwl), std::forward_list<int>>, ""); | ||
assert(std::equal(fwl.begin(), fwl.end(), std::begin(arr), std::end(arr))); | ||
} | ||
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{ | ||
const long arr[] = {INT_MAX, 1L, 2L, 3L }; | ||
std::forward_list fwl(std::begin(arr), std::end(arr), std::allocator<long>()); | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, long>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 4); // no size for forward_list | ||
auto it = fwl.begin(); | ||
assert(*it++ == INT_MAX); | ||
assert(*it++ == 1L); | ||
assert(*it++ == 2L); | ||
} | ||
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// Test the implicit deduction guides | ||
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{ | ||
// We don't expect this one to work. | ||
// std::forward_list fwl(std::allocator<int>()); // deque (allocator &) | ||
} | ||
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{ | ||
std::forward_list fwl(1, A{}); // deque (size_type, T) | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, A>, ""); | ||
static_assert(std::is_same_v<decltype(fwl)::allocator_type, std::allocator<A>>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 1); // no size for forward_list | ||
} | ||
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{ | ||
std::forward_list fwl(1, A{}, test_allocator<A>()); // deque (size_type, T, allocator) | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, A>, ""); | ||
static_assert(std::is_same_v<decltype(fwl)::allocator_type, test_allocator<A>>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 1); // no size for forward_list | ||
} | ||
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{ | ||
std::forward_list fwl{1U, 2U, 3U, 4U, 5U}; // deque(initializer-list) | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, unsigned>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 5); // no size for forward_list | ||
auto it = fwl.begin(); | ||
std::advance(it, 2); | ||
assert(*it == 3U); | ||
} | ||
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{ | ||
std::forward_list fwl({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // deque(initializer-list, allocator) | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, double>, ""); | ||
static_assert(std::is_same_v<decltype(fwl)::allocator_type, test_allocator<double>>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 4); // no size for forward_list | ||
auto it = fwl.begin(); | ||
std::advance(it, 3); | ||
assert(*it == 4.0); | ||
} | ||
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{ | ||
std::forward_list<long double> source; | ||
std::forward_list fwl(source); // deque(deque &) | ||
static_assert(std::is_same_v<decltype(fwl)::value_type, long double>, ""); | ||
static_assert(std::is_same_v<decltype(fwl)::allocator_type, std::allocator<long double>>, ""); | ||
assert(std::distance(fwl.begin(), fwl.end()) == 0); // no size for forward_list | ||
} | ||
} |