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
89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
// -*- C++ -*-
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//===------------------------------ span ---------------------------------===//
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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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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <span>
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// constexpr span() noexcept;
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#include <span>
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#include <cassert>
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#include <string>
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#include <type_traits>
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#include "test_macros.h"
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void checkCV()
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{
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// Types the same (dynamic sized)
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{
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std::span< int> s1;
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std::span<const int> s2;
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std::span< volatile int> s3;
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std::span<const volatile int> s4;
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assert(s1.size() + s2.size() + s3.size() + s4.size() == 0);
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}
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// Types the same (static sized)
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{
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std::span< int,0> s1;
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std::span<const int,0> s2;
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std::span< volatile int,0> s3;
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std::span<const volatile int,0> s4;
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assert(s1.size() + s2.size() + s3.size() + s4.size() == 0);
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}
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}
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template <typename T>
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constexpr bool testConstexprSpan()
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{
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std::span<const T> s1;
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std::span<const T, 0> s2;
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return
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s1.data() == nullptr && s1.size() == 0
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&& s2.data() == nullptr && s2.size() == 0;
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}
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template <typename T>
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void testRuntimeSpan()
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{
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ASSERT_NOEXCEPT(T{});
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std::span<const T> s1;
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std::span<const T, 0> s2;
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assert(s1.data() == nullptr && s1.size() == 0);
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assert(s2.data() == nullptr && s2.size() == 0);
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}
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struct A{};
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int main(int, char**)
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{
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static_assert(testConstexprSpan<int>(), "");
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static_assert(testConstexprSpan<long>(), "");
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static_assert(testConstexprSpan<double>(), "");
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static_assert(testConstexprSpan<A>(), "");
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testRuntimeSpan<int>();
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testRuntimeSpan<long>();
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testRuntimeSpan<double>();
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testRuntimeSpan<std::string>();
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testRuntimeSpan<A>();
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checkCV();
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static_assert( std::is_default_constructible_v<std::span<int, std::dynamic_extent>>, "");
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static_assert( std::is_default_constructible_v<std::span<int, 0>>, "");
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static_assert(!std::is_default_constructible_v<std::span<int, 2>>, "");
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return 0;
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}
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