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Refix MSVC Debug crash

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This commit is contained in:
a3d4
2022-04-26 01:52:56 +02:00
parent 559174054f
commit 048b253a93
2 changed files with 31 additions and 25 deletions
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libsolutil/Visitor.h
+12 -1
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@@ -56,6 +56,17 @@ struct VisitorFallback<R> { template<typename T> R operator()(T&&) const { retur
template<>
struct VisitorFallback<> { template<typename T> void operator()(T&&) const {} };
template <typename... Visitors> struct GenericVisitor: Visitors... { using Visitors::operator()...; };
// MSVC. Empty base class optimization does not happen in some scenarios.
// Enforcing it with __declspec(empty_bases) avoids MSVC Debug test crash
// (Run-Time Check Failure #2 - Stack around the variable '....' was corrupted).
// See https://docs.microsoft.com/en-us/cpp/cpp/empty-bases,
// https://developercommunity.visualstudio.com/t/10005513.
#if defined(_MSC_VER)
#define SOLC_EMPTY_BASES __declspec(empty_bases)
#else
#define SOLC_EMPTY_BASES
#endif
template <typename... Visitors> struct SOLC_EMPTY_BASES GenericVisitor: Visitors... { using Visitors::operator()...; };
template <typename... Visitors> GenericVisitor(Visitors...) -> GenericVisitor<Visitors...>;
}