daw::json::anonymous_namespace{daw_json_traits.h} Namespace Reference

Classes
struct	tuple_elements_pack
	Allow tuple like types to be used in json_tuple. More...
struct	tuple_elements_pack< daw::fwd_pack< Ts... > >
struct	tuple_elements_pack< std::tuple< Ts... > >

Typedefs
template<typename T >
using	can_single_allocation_string = std::bool_constant< can_single_allocation_string_v< T > >
template<typename T >
using	is_zero_terminated_string = std::bool_constant< is_zero_terminated_string_v< T > >

Functions
	DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT (ignore_unknown_members_v, json_data_contract< T >::ignore_unknown_members)
	DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT (is_exact_class_mapping_v, json_data_contract< T >::exact_class_mapping)

Variables
template<typename >
constexpr bool	can_single_allocation_string_v = false
	Can use the fast, pseudo random string iterators. They are InputIterators with an operator- that allows for O(1) distance calculations as we often know the length but cannot provide random access. For types that only use InputIterator operations and last - first for distance calc. More...
template<typename T >
constexpr bool	force_aggregate_construction_v
template<typename... Ts>
constexpr bool	is_empty_pack_v = sizeof...( Ts ) == 0
template<typename T >
constexpr bool	is_pinned_type_v
	Is the type pinned in memory and unable to be copied/moved after construction(e.g. std::mutex). These types require using RVO in order to be used but that can have a penalty as std::current_exceptions( ) must be checked which is quite noticeable on MSVC. More...
template<typename T >
constexpr bool	is_pointer_like_v
template<typename >
constexpr bool	is_zero_terminated_string_v = false
template<typename Constructor , typename T , typename ParseState >
constexpr bool	should_construct_explicitly_v

Typedef Documentation

can_single_allocation_string

template<typename T >

using daw::json::anonymous_namespace{daw_json_traits.h}::can_single_allocation_string = typedef std::bool_constant<can_single_allocation_string_v<T> >

Definition at line 176 of file daw_json_traits.h.

is_zero_terminated_string

template<typename T >

using daw::json::anonymous_namespace{daw_json_traits.h}::is_zero_terminated_string = typedef std::bool_constant<is_zero_terminated_string_v<T> >

Definition at line 235 of file daw_json_traits.h.

Function Documentation

DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT() [1/2]

daw::json::anonymous_namespace{daw_json_traits.h}::DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT	(	ignore_unknown_members_v	,
		json_data_contract< T >::ignore_unknown_members
	)

DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT() [2/2]

daw::json::anonymous_namespace{daw_json_traits.h}::DAW_JSON_MAKE_REQ_TYPE_ALIAS_TRAIT	(	is_exact_class_mapping_v	,
		json_data_contract< T >::exact_class_mapping
	)

Variable Documentation

can_single_allocation_string_v

template<typename >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::can_single_allocation_string_v = false

inlineconstexpr

Can use the fast, pseudo random string iterators. They are InputIterators with an operator- that allows for O(1) distance calculations as we often know the length but cannot provide random access. For types that only use InputIterator operations and last - first for distance calc.

Definition at line 169 of file daw_json_traits.h.

force_aggregate_construction_v

template<typename T >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::force_aggregate_construction_v

inlineconstexpr

Initial value:

=
      json_details::force_aggregate_construction_test1<T> or
      json_details::force_aggregate_construction_test2<T>

Definition at line 100 of file daw_json_traits.h.

is_empty_pack_v

template<typename... Ts>

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::is_empty_pack_v = sizeof...( Ts ) == 0

inlineconstexpr

Definition at line 160 of file daw_json_traits.h.

is_pinned_type_v

template<typename T >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::is_pinned_type_v

inlineconstexpr

Initial value:

= not(
      (std::is_copy_constructible_v<T> and std::is_copy_assignable_v<T>) or
      ( std::is_move_constructible_v<T> and std::is_move_assignable_v<T> ) )

Is the type pinned in memory and unable to be copied/moved after construction(e.g. std::mutex). These types require using RVO in order to be used but that can have a penalty as std::current_exceptions( ) must be checked which is quite noticeable on MSVC.

Template Parameters

T	type to check

Definition at line 364 of file daw_json_traits.h.

is_pointer_like_v

template<typename T >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::is_pointer_like_v

inlineconstexpr

Initial value:

=
      std::is_pointer_v<T> or json_details::has_element_type<T>

Definition at line 319 of file daw_json_traits.h.

is_zero_terminated_string_v

template<typename >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::is_zero_terminated_string_v = false

inlineconstexpr

Definition at line 227 of file daw_json_traits.h.

should_construct_explicitly_v

template<typename Constructor , typename T , typename ParseState >

constexpr bool daw::json::anonymous_namespace{daw_json_traits.h}::should_construct_explicitly_v

inlineconstexpr

Initial value:

=
      not json_details::has_data_contract_constructor_v<T> and
      ( force_aggregate_construction_v<T> or
        json_details::is_default_default_constructor_type_v<Constructor> or
        not json_details::has_stateless_allocator_v<ParseState> )

Definition at line 153 of file daw_json_traits.h.