一年多来，我一直在使用Boost的Bimap作为库存系统的基础。
typedef boost::bimap<boost::bimaps::set_of<uint32>,
boost::bimaps::multiset_of<uint32>,
boost::bimaps::with_info<FItemDetails>> InventoryBimap;在从Unreal 4升级到Unreal 5之后，我做了一些其他的改动，从Boost 1.68.0升级到1.79.0，从C17升级到C20。
编辑：对不起，我忘了包括我正在使用Visual Studio 2022。
有两个来源的一堆编译错误，阻止我的游戏编译：
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2988: unrecognizable template declaration/definition
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(127): note: see reference to class template instantiation 'boost::detail::ptr_to_expr<T,E>' being compiled
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2059: syntax error: '<end Parse>'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2988: unrecognizable template declaration/definition
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2059: syntax error: '->'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(120): error C2238: unexpected token(s) preceding ';'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(123): error C2988: unrecognizable template declaration/definition
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(123): error C2059: syntax error: '<end Parse>'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\pointer_traits.hpp(123): error C2334: unexpected token(s) preceding '{'; skipping apparent function body然后：
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(397): error C2988: unrecognizable template declaration/definition
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(407): note: see reference to class template instantiation 'boost::detail::alloc_has_allocate<A>' being compiled
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(397): error C2059: syntax error: '<end Parse>'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(397): error C2334: unexpected token(s) preceding '{'; skipping apparent function body
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(398): error C2988: unrecognizable template declaration/definition
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(398): error C2059: syntax error: '->'
1>H:\UnrealEngine\Engine\Source\ThirdParty\boost\boost-1_79_0\include\boost\core\allocator_access.hpp(400): error C2238: unexpected token(s) preceding ';'第二个错误会在allocator_access. hpp中的每个模板上重复出现。
到目前为止，我发现的唯一短期修复方法是注解掉项目中包含的所有bimap。
我目前不确定如何进行，并希望有人有一些洞察力可能会发生什么。
2条答案
按热度按时间6yoyoihd1#
所以，我找到了答案。我在这里分享一下，让大家都知道：
在pointer_traits.hpp中，模板有两个函数：
我突然注意到了这个名字：“检查”。
“check”是一个Unreal宏名称，强制虚幻引擎在调用时崩溃（除非附加调试器）。因此，* 看起来 * 正常的函数调用被解释为调用Unreal的check宏，并导致编译失败。
所以我不得不在整个Boost中将“check”重命名为其他名称。这修复了编译错误，我的库存系统又开始工作了。
nc1teljy2#
我也遇到过这个问题，PosoKhov的解决方案是最快和最干净的。分叉UE repo和修改宏很快变得混乱，因为它似乎也在插件中引用。