BlackMATov/meta.hpp
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add family id to value

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BlackMATov
2021-07-05 21:17:27 +07:00
parent 548a2c680a
commit e9cdbd0c0a
2 changed files with 67 additions and 14 deletions
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42
headers/meta.hpp/meta_value.hpp
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@@ -20,27 +20,30 @@ namespace meta_hpp
value& operator=(value&&) = default;
value& operator=(const value&) = default;
template < typename T >
value(T&& value)
: raw_{std::forward<T>(value)} {}
template < typename T
, typename U = std::decay_t<T>
, typename = std::enable_if_t<!std::is_same_v<U, value>> >
value(T&& val)
: raw_{std::forward<T>(val)}
, fid_{get_type_family_id<U>()} {}
template < typename T >
value& operator=(T&& value) noexcept {
raw_ = std::forward<T>(value);
template < typename T
, typename U = std::decay_t<T>
, typename = std::enable_if_t<!std::is_same_v<U, value>> >
value& operator=(T&& val) {
value{std::forward<T>(val)}.swap(*this);
return *this;
}
template < typename T, typename... Args >
value(std::in_place_type_t<T>, Args&&... args)
: raw_{std::in_place_type<T>, std::forward<Args>(args)...} {}
explicit value(std::in_place_type_t<T>, Args&&... args)
: raw_{std::in_place_type<T>, std::forward<Args>(args)...}
, fid_{get_type_family_id<T>()} {}
template < typename T, typename U, typename... Args >
value(std::in_place_type_t<T>, std::initializer_list<U> ilist, Args&&... args)
: raw_{std::in_place_type<T>, ilist, std::forward<Args>(args)...} {}
void swap(value& other) noexcept {
raw_.swap(other.raw_);
}
explicit value(std::in_place_type_t<T>, std::initializer_list<U> ilist, Args&&... args)
: raw_{std::in_place_type<T>, ilist, std::forward<Args>(args)...}
, fid_{get_type_family_id<T>()} {}
template < typename T >
T cast() && {
@@ -68,6 +71,16 @@ namespace meta_hpp
try_cast() const noexcept {
return std::any_cast<T>(&raw_);
}
family_id fid() const noexcept {
return fid_;
}
void swap(value& other) noexcept {
using std::swap;
swap(raw_, other.raw_);
swap(fid_, other.fid_);
}
public:
bool to_bool() const { return cast<bool>(); }
int to_int() const { return cast<int>(); }
@@ -91,6 +104,7 @@ namespace meta_hpp
std::uintptr_t to_uintptr_t() const { return cast<std::uintptr_t>(); }
private:
std::any raw_;
family_id fid_;
};
inline void swap(value& l, value& r) noexcept {