bf7dc572f1
[libcxx] [test] Calling min and max on an empty valarray is UB. libcxx/test/std/numerics/numarray/template.valarray/valarray.members/min.pass.cpp libcxx/test/std/numerics/numarray/template.valarray/valarray.members/max.pass.cpp The calls `v1.min();` and `v1.max();` were emitting nodiscard warnings with MSVC's STL. Upon closer inspection, these calls were triggering undefined behavior. N4842 [valarray.members] says: "T min() const; 8 Preconditions: size() > 0 is true. T max() const; 10 Preconditions: size() > 0 is true." As these tests already provide coverage for non-empty valarrays (immediately above), I've simply deleted the code for empty valarrays. [libcxx] [test] Add macros to msvc_stdlib_force_include.h (NFC). libcxx/test/support/msvc_stdlib_force_include.h These macros are being used by: libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp Defining them to nothing allows that test to pass. [libcxx] [test] Silence MSVC warning C5063 for is_constant_evaluated (NFC). libcxx/test/std/utilities/meta/meta.const.eval/is_constant_evaluated.pass.cpp This test is intentionally writing code that MSVC intentionally warns about, so the warning should be silenced. Additionally, comment an endif for clarity. [libcxx] [test] Silence MSVC warning C4127 (NFC). libcxx/test/support/charconv_test_helpers.h MSVC avoids emitting this warning when it sees a single constexpr value being tested, but this condition is a mix of compile-time and run-time. Using push-disable-pop is the least intrusive way to silence this. [libcxx] [test] Silence MSVC truncation warning (NFC). libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp This test is intentionally truncating float to int, which MSVC intentionally warns about, so push-disable-pop is necessary. [libcxx] [test] Avoid truncation warnings in erase_if tests (NFC). libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp libcxx/test/std/containers/associative/multimap/multimap.erasure/erase_if.pass.cpp libcxx/test/std/containers/unord/unord.map/erase_if.pass.cpp libcxx/test/std/containers/unord/unord.multimap/erase_if.pass.cpp These tests use maps with `short` keys and values, emitting MSVC truncation warnings from `int`. Adding `static_cast` to `key_type` and `mapped_type` avoids these warnings. As these tests require C++20 mode (or newer), for brevity I've changed the multimap tests to use emplace to initialize the test data. This has no effect on the erase_if testing.
39 lines
968 B
C++
39 lines
968 B
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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// <valarray>
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// template<class T> class valarray;
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// value_type max() const;
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#include <valarray>
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#include <cassert>
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#include "test_macros.h"
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int main(int, char**)
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{
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{
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typedef double T;
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T a1[] = {1.5, 2.5, -3, 4, -5.5};
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const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
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std::valarray<T> v1(a1, N1);
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assert(v1.max() == 4.0);
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}
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{
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typedef double T;
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T a1[] = {1.5, 2.5, -3, 4, -5.5};
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const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
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std::valarray<T> v1(a1, N1);
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assert((2*v1).max() == 8.0);
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}
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return 0;
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}
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