Template Struct StructAccessor

• Defined in File struct_accessor.hpp

Inheritance Relationships

Base Type

• public Storage

Struct Documentation

template<typename T, typename Storage, size_t Index>
struct ripple::StructAccessor : public Storage

The struct accessor gets a components of a struct at a given index for a given storage type, this can be used in a union to allow aliases of data elements, for example:

struct Vec2 {
 using Storage = std::array<int, 2>;

 union {
   Storage data;
   StructAccessor<int, Storage, 0> x;
   StructAccessor<int, Storage, 1> y;
 };

 auto operator[](size_t i) -> int& {
   return data[i];
 }
};

// Usage:
Vec 2 v;
v[0] = 2;
v.y = 3;

Template Parameters

• T: The type of the data for the accessor.

• Storage: The type of the storage for the accessor.

• Index: The index of the element in the storage.

Public Functions

operator T() const noexcept

Overload of conversion operator.

operator T&() noexcept

Overload of conversion to reference operator.

auto operator=(T v) noexcept -> StructAccessor&

Overload of equal operator to set the value to v.

Parameters

• v: The value to set the accessor to.

Public Static Attributes

constexpr bool is_accessor = is_storage_accessor_v<Storage>

True if the type is a storage accessor.