31cbe0f240
C++98 and C++03 are effectively aliases as far as Clang is concerned. As such, allowing both std=c++98 and std=c++03 as Lit parameters is just slightly confusing, but provides no value. It's similar to allowing both std=c++17 and std=c++1z, which we don't do. This was discovered because we had an internal bot that ran the test suite under both c++98 AND c++03 -- one of which is redundant. Differential Revision: https://reviews.llvm.org/D80926
77 lines
2.4 KiB
C++
77 lines
2.4 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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// <numeric>
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// UNSUPPORTED: c++03, c++11, c++14
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// template<class InputIterator, class T, class BinaryOperation>
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// T reduce(InputIterator first, InputIterator last, T init, BinaryOperation op);
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#include <numeric>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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template <class Iter, class T, class Op>
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void
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test(Iter first, Iter last, T init, Op op, T x)
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{
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static_assert( std::is_same_v<T, decltype(std::reduce(first, last, init, op))>, "" );
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assert(std::reduce(first, last, init, op) == x);
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}
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template <class Iter>
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void
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test()
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{
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int ia[] = {1, 2, 3, 4, 5, 6};
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unsigned sa = sizeof(ia) / sizeof(ia[0]);
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test(Iter(ia), Iter(ia), 0, std::plus<>(), 0);
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test(Iter(ia), Iter(ia), 1, std::multiplies<>(), 1);
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test(Iter(ia), Iter(ia+1), 0, std::plus<>(), 1);
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test(Iter(ia), Iter(ia+1), 2, std::multiplies<>(), 2);
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test(Iter(ia), Iter(ia+2), 0, std::plus<>(), 3);
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test(Iter(ia), Iter(ia+2), 3, std::multiplies<>(), 6);
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test(Iter(ia), Iter(ia+sa), 0, std::plus<>(), 21);
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test(Iter(ia), Iter(ia+sa), 4, std::multiplies<>(), 2880);
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}
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template <typename T, typename Init>
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void test_return_type()
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{
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T *p = nullptr;
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static_assert( std::is_same_v<Init, decltype(std::reduce(p, p, Init{}, std::plus<>()))>, "" );
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}
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int main(int, char**)
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{
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test_return_type<char, int>();
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test_return_type<int, int>();
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test_return_type<int, unsigned long>();
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test_return_type<float, int>();
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test_return_type<short, float>();
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test_return_type<double, char>();
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test_return_type<char, double>();
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test<input_iterator<const int*> >();
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test<forward_iterator<const int*> >();
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test<bidirectional_iterator<const int*> >();
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test<random_access_iterator<const int*> >();
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test<const int*>();
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// Make sure the math is done using the correct type
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{
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auto v = {1, 2, 3, 4, 5, 6, 7, 8};
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unsigned res = std::reduce(v.begin(), v.end(), 1U, std::multiplies<>());
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assert(res == 40320); // 8! will not fit into a char
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}
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return 0;
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}
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