dcaa2c4870
...which, unlike std::is_signed, also requires that T is an integer type, not just any arithmetic type, but which appears to fit well here anyway. But LLVM 12 libc++, which is apparently used by Android builds, only provides a bare-bones <concepts> that lacks std::signed_integral (among others), so for now introduce o3tl/concepts.hxx providing what's missing (incl. std::integral and std::unsigned_integral, for some kind of consistency). Change-Id: I1c37d37fa1b57b5e3bf24c9e44f3973003905cb2 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/158406 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <sal/config.h>
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#include <concepts>
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// LLVM 12 libc++ only provides a bare-bones <concepts> that lacks most of its C++20 content, so
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// replicate here fore now what we need:
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#if defined __cpp_lib_concepts
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namespace o3tl
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{
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using std::integral;
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using std::signed_integral;
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using std::unsigned_integral;
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}
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#else
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#include <type_traits>
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namespace o3tl
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{
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// Taken from the C++20 spec:
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template <typename T> concept integral = std::is_integral_v<T>;
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template <typename T> concept signed_integral = integral<T>&& std::is_signed_v<T>;
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template <typename T> concept unsigned_integral = integral<T> && !signed_integral<T>;
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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