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41 lines
1.7 KiB
C++
41 lines
1.7 KiB
C++
#pragma once
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#include <Geode/Bindings.hpp>
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template <auto V1, auto V2, auto V3, class... Types>
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struct False {
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static constexpr auto value = false;
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};
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template<int Difference, int Expected, int Current, class Class, class Member, bool Predicate>
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struct MemberIsOffsetBy {
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static_assert(False<Difference, Expected, Current, Class, Member>::value, "Member is offset by this value (Difference, Expected, Current, Class, Member)");
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};
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template<int Difference, int Expected, int Current, class Class, bool Predicate>
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struct SizeIsOffsetBy {
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static_assert(False<Difference, Expected, Current, Class>::value, "Size is offset by this value (Difference, Expected, Current, Class)");
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};
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template<int Difference, int Expected, int Current, class Class, class Member>
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struct MemberIsOffsetBy<Difference, Expected, Current, Class, Member, true> {
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};
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template<int Difference, int Expected, int Current, class Class>
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struct SizeIsOffsetBy<Difference, Expected, Current, Class, true> {
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};
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template <class Member, class Class, int Offset, int Expected>
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struct SingleMemberChecker {
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using IsOffsetBy = MemberIsOffsetBy<Offset - Expected, Expected, Offset, Class, Member, Expected == Offset>;
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};
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template <class Class, int Offset, int Expected>
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struct SingleSizeChecker {
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using IsOffsetBy = SizeIsOffsetBy<Offset - Expected, Expected, Offset, Class, Expected == Offset>;
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};
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#define GEODE_MEMBER_CHECK(Class_, Member_, Offset_) class Member_; SingleMemberChecker<Member_, Class_, offsetof(Class_, Member_), Offset_>::IsOffsetBy GEODE_CONCAT(OffsetBy, __LINE__)
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#define GEODE_SIZE_CHECK(Class_, Offset_) SingleSizeChecker<Class_, sizeof(Class_), Offset_>::IsOffsetBy GEODE_CONCAT(OffsetBy, __LINE__)
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