49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#pragma once
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#include <libguile.h>
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namespace scm {
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namespace detail {
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#define SCM_DECLTYPE_RETURN(...) \
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decltype(__VA_ARGS__) \
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{ return __VA_ARGS__; } \
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/**/
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template <typename... Ts>
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constexpr bool is_valid_v = true;
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template <typename... Ts>
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using is_valid_t = void;
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template <typename... Ts>
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void check_call_once()
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{
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static bool called = false;
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if (called) scm_misc_error (nullptr, "Double defined binding. \
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This may be caused because there are multiple C++ binding groups in the same \
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translation unit. You may solve this by using different type tags for each \
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binding group.", SCM_EOL);
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called = true;
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}
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struct move_sequence
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{
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move_sequence() = default;
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move_sequence(const move_sequence&) = delete;
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move_sequence(move_sequence&& other)
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{ other.moved_from_ = true; };
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bool moved_from_ = false;
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};
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} // namespace detail
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} // namespace scm
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