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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
// views::iota
#include <ranges>
#include <cassert>
#include <concepts>
#include "test_macros.h"
#include "types.h"
template<class T, class U>
constexpr void testType(U u) {
// Test that this generally does the right thing.
// Test with only one argument.
{
assert(*std::views::iota(T(0)).begin() == T(0));
}
{
const auto io = std::views::iota(T(10));
assert(*io.begin() == T(10));
}
// Test with two arguments.
{
assert(*std::views::iota(T(0), u).begin() == T(0));
}
{
const auto io = std::views::iota(T(10), u);
assert(*io.begin() == T(10));
}
// Test that we return the correct type.
{
ASSERT_SAME_TYPE(decltype(std::views::iota(T(10))), std::ranges::iota_view<T>);
ASSERT_SAME_TYPE(decltype(std::views::iota(T(10), u)), std::ranges::iota_view<T, U>);
}
}
struct X {};
constexpr bool test() {
testType<SomeInt>(SomeInt(10));
testType<SomeInt>(IntComparableWith(SomeInt(10)));
testType<signed long>(IntComparableWith<signed long>(10));
testType<unsigned long>(IntComparableWith<unsigned long>(10));
testType<int>(IntComparableWith<int>(10));
testType<int>(int(10));
testType<unsigned>(unsigned(10));
testType<unsigned>(IntComparableWith<unsigned>(10));
testType<short>(short(10));
testType<short>(IntComparableWith<short>(10));
testType<unsigned short>(IntComparableWith<unsigned short>(10));
{
static_assert( std::is_invocable_v<decltype(std::views::iota), int>);
static_assert(!std::is_invocable_v<decltype(std::views::iota), X>);
static_assert( std::is_invocable_v<decltype(std::views::iota), int, int>);
static_assert(!std::is_invocable_v<decltype(std::views::iota), int, X>);
}
{
static_assert(std::same_as<decltype(std::views::iota), decltype(std::ranges::views::iota)>);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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