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33b47f7309
The only way to stream those is to use the `bool` overload of `op<<`.
However, to convert a function to bool, GCC creates AST equivalent
of `A? true : false`. Then, because `A` is a function, it warns that
it will never be `false`. 🤦
As a bonus, newer GCC versions issue _two_ different warnings about
this, but older GCC versions do not know both of them, so we also
have to suppress warning about unknown warning suppression.
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/*
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* Created by Phil on 2/12/2013.
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* Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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#ifndef TWOBLUECUBES_CATCH_STREAM_H_INCLUDED
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#define TWOBLUECUBES_CATCH_STREAM_H_INCLUDED
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#include "catch_common.h"
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#include <iosfwd>
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#include <cstddef>
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#include <ostream>
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namespace Catch {
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std::ostream& cout();
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std::ostream& cerr();
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std::ostream& clog();
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class StringRef;
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struct IStream {
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virtual ~IStream();
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virtual std::ostream& stream() const = 0;
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};
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auto makeStream( StringRef const &filename ) -> IStream const*;
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class ReusableStringStream : NonCopyable {
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std::size_t m_index;
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std::ostream* m_oss;
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public:
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ReusableStringStream();
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~ReusableStringStream();
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auto str() const -> std::string;
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic push
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// Old versions of GCC do not understand -Wnonnull-compare
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#pragma GCC diagnostic ignored "-Wpragmas"
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// Streaming a function pointer triggers Waddress and Wnonnull-compare
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// on GCC, because it implicitly converts it to bool and then decides
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// that the check it uses (a? true : false) is tautological and cannot
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// be null...
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#pragma GCC diagnostic ignored "-Waddress"
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#pragma GCC diagnostic ignored "-Wnonnull-compare"
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#endif
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template<typename T>
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auto operator << ( T const& value ) -> ReusableStringStream& {
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*m_oss << value;
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return *this;
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}
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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auto get() -> std::ostream& { return *m_oss; }
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};
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}
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#endif // TWOBLUECUBES_CATCH_STREAM_H_INCLUDED
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