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Visitable init #14

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Visitable init #14

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78e4e01
Add VISITABLE_INIT
NikolausDemmel Jan 15, 2019
7b70ef1
Add VISITABLE_DIRECT_INIT
NikolausDemmel Feb 27, 2019
d74cde4
VISITABLE_DIRECT_INIT: make variadic macro standard conformant
NikolausDemmel Jan 17, 2022
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34 changes: 34 additions & 0 deletions include/visit_struct/visit_struct_intrusive.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -382,6 +382,40 @@ static inline ::visit_struct::detail::Append_t<VISIT_STRUCT_GET_REGISTERED_MEMBE
Visit_Struct_Get_Visitables__(::visit_struct::detail::Rank<VISIT_STRUCT_GET_REGISTERED_MEMBERS::size + 1>); \
static_assert(true, "")

#define VISITABLE_INIT(TYPE, NAME, VALUE) \
TYPE NAME = VALUE; \
struct VISIT_STRUCT_MAKE_MEMBER_NAME(NAME) : \
visit_struct::detail::member_ptr_helper<VISIT_STRUCT_CURRENT_TYPE, \
TYPE, \
&VISIT_STRUCT_CURRENT_TYPE::NAME> \
{ \
static VISIT_STRUCT_CONSTEXPR const ::visit_struct::detail::char_array<sizeof(#NAME)> & member_name() { \
return #NAME; \
} \
}; \
static inline ::visit_struct::detail::Append_t<VISIT_STRUCT_GET_REGISTERED_MEMBERS, \
VISIT_STRUCT_MAKE_MEMBER_NAME(NAME)> \
Visit_Struct_Get_Visitables__(::visit_struct::detail::Rank<VISIT_STRUCT_GET_REGISTERED_MEMBERS::size + 1>); \
static_assert(true, "")

// use variadic macro to allow passing initializer lists with commas, e.g.:
// VISITABLE_DIRECT_INIT(std::vector<int>, foo, {1, 2, 3})
#define VISITABLE_DIRECT_INIT(TYPE, NAME, ...) \
TYPE NAME __VA_ARGS__; \
struct VISIT_STRUCT_MAKE_MEMBER_NAME(NAME) : \
visit_struct::detail::member_ptr_helper<VISIT_STRUCT_CURRENT_TYPE, \
TYPE, \
&VISIT_STRUCT_CURRENT_TYPE::NAME> \
{ \
static VISIT_STRUCT_CONSTEXPR const ::visit_struct::detail::char_array<sizeof(#NAME)> & member_name() { \
return #NAME; \
} \
}; \
static inline ::visit_struct::detail::Append_t<VISIT_STRUCT_GET_REGISTERED_MEMBERS, \
VISIT_STRUCT_MAKE_MEMBER_NAME(NAME)> \
Visit_Struct_Get_Visitables__(::visit_struct::detail::Rank<VISIT_STRUCT_GET_REGISTERED_MEMBERS::size + 1>); \
static_assert(true, "")

#define END_VISITABLES \
typedef VISIT_STRUCT_GET_REGISTERED_MEMBERS Visit_Struct_Registered_Members_List__; \
typedef ::visit_struct::detail::intrusive_tag Visit_Struct_Visitable_Structure_Tag__; \
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