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Most of these will not matter in practice due to C++14 imposing significant limitations on what else we can make constexpr, and we cannot have references outliving the constexpr context either way.
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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#ifndef CATCH_LAZY_EXPR_HPP_INCLUDED
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#define CATCH_LAZY_EXPR_HPP_INCLUDED
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#include <iosfwd>
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namespace Catch {
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class ITransientExpression;
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class LazyExpression {
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friend class AssertionHandler;
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friend struct AssertionStats;
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friend class RunContext;
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ITransientExpression const* m_transientExpression = nullptr;
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bool m_isNegated;
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public:
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constexpr LazyExpression( bool isNegated ):
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m_isNegated(isNegated)
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{}
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constexpr LazyExpression(LazyExpression const& other) = default;
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LazyExpression& operator = ( LazyExpression const& ) = delete;
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constexpr explicit operator bool() const {
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return m_transientExpression != nullptr;
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}
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friend auto operator << ( std::ostream& os, LazyExpression const& lazyExpr ) -> std::ostream&;
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};
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} // namespace Catch
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#endif // CATCH_LAZY_EXPR_HPP_INCLUDED
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