llfio_v2_xxx::storage_profile::item_erased Struct Reference

A type erased tag-value item. More...

#include "storage_profile.hpp"

Inheritance diagram for llfio_v2_xxx::storage_profile::item_erased:

Public Types
using	handle_type = item_base::handle_type

Public Member Functions
	item_erased (const item_erased &)=delete
	item_erased (item_erased &&)=delete
item_erased &	operator= (const item_erased &)=delete
item_erased &	operator= (item_erased &&)=delete
template<class U >
auto	invoke (U &&f) const
	Call the callable with the unerased type.
outcome< void >	operator() (storage_profile &sp, handle_type &h) const
	Set this item if its value is default.

Public Attributes
char	_padding [item_size - sizeof(item_base)]
const char *	name
	The name of the item in colon delimited category format.
const char *	description
	Some description of the item.
storage_types	type
	The type of the value.

Static Public Attributes
static constexpr size_t	item_size = item_base::item_size

Detailed Description

A type erased tag-value item.

Member Function Documentation

invoke()

template<class U >

auto llfio_v2_xxx::storage_profile::item_erased::invoke ( U &&  f ) const

inline

Call the callable with the unerased type.

    {
      switch(type)
      {
      case storage_types::extent_type:
        return f(*reinterpret_cast<const item<byte_io_handle::extent_type> *>(static_cast<const item_base *>(this)));
      case storage_types::unsigned_int:
        return f(*reinterpret_cast<const item<unsigned int> *>(static_cast<const item_base *>(this)));
      case storage_types::unsigned_long_long:
        return f(*reinterpret_cast<const item<unsigned long long> *>(static_cast<const item_base *>(this)));
      case storage_types::float_:
        return f(*reinterpret_cast<const item<float> *>(static_cast<const item_base *>(this)));
      case storage_types::string:
        return f(*reinterpret_cast<const item<std::string> *>(static_cast<const item_base *>(this)));
      case storage_types::unknown:
        break;
      }
      LLFIO_EXCEPTION_THROW(std::invalid_argument("No type set in item"));  // NOLINT
    }

operator()()

outcome< void > llfio_v2_xxx::storage_profile::item_erased::operator() ( storage_profile &  sp, handle_type &  h  ) const

inline

Set this item if its value is default.

    {
      return invoke([&sp, &h](auto &item) { return item(sp, h); });
    }

---

The documentation for this struct was generated from the following file:

• include/llfio/v2.0/storage_profile.hpp