parcel::ICellTypeDescriptor Struct Reference

Runtime descriptor for a cell type — type-erased face of a CellLike. More...

#include <descriptor.h>

Inheritance diagram for parcel::ICellTypeDescriptor:

Public Member Functions
virtual std::string_view	kind () const =0
	Wire-stable kind identifier.
virtual DisplayInfo	display_info () const =0
	Display info for this cell type.
virtual descriptor::CellCategory	category () const =0
	Coarse classification (primitive, list, struct, …).
virtual std::type_index	storage_type () const =0
	std::type_index of the cell's storage type.
virtual cell_t	cell_from_json (const json_t &j, ParcelRegistry const &reg) const =0
	Construct a cell from JSON, dispatching to the concrete from_json.
virtual json_t	to_json () const =0
	Serialize the descriptor itself (kind + display info + category + extras).

Detailed Description

Runtime descriptor for a cell type — type-erased face of a CellLike.

Held by the registry and used to dispatch deserialization into the right concrete cell when only a kind id is known at runtime.

See also

BaseCellTypeDescriptor — CRTP base used by every concrete descriptor.

Member Function Documentation

cell_from_json()

virtual cell_t parcel::ICellTypeDescriptor::cell_from_json ( const json_t &  j, ParcelRegistry const &  reg  ) const

pure virtual

Construct a cell from JSON, dispatching to the concrete from_json.

Parameters

j	JSON object to deserialize.
reg	Registry used to resolve nested polymorphic cells.

Returns

Newly built cell handle.

Exceptions

std::runtime_error

on shape or kind mismatch.

Implemented in parcel::SimpleCellTypeDescriptor< T >, parcel::ListCellTypeDescriptor, parcel::MapCellTypeDescriptor, parcel::HashMapCellTypeDescriptor, parcel::TypedListCellTypeDescriptor< T >, parcel::TypedMapCellTypeDescriptor< T >, parcel::StructCellTypeDescriptor< Derived, Payload >, and parcel::UnionCellTypeDescriptor< Ts >.

to_json()

virtual json_t parcel::ICellTypeDescriptor::to_json ( ) const

pure virtual

Serialize the descriptor itself (kind + display info + category + extras).

Returns

JSON object describing this cell type.

Implemented in parcel::BaseCellTypeDescriptor< T >, parcel::BaseCellTypeDescriptor< Derived >, parcel::BaseCellTypeDescriptor< HashMapCell >, parcel::BaseCellTypeDescriptor< ListCell >, parcel::BaseCellTypeDescriptor< MapCell >, parcel::BaseCellTypeDescriptor< TypedHashMapCell< T > >, parcel::BaseCellTypeDescriptor< TypedListCell< T > >, parcel::BaseCellTypeDescriptor< TypedMapCell< T > >, parcel::BaseCellTypeDescriptor< UnionCell< Ts... > >, parcel::TypedListCellTypeDescriptor< T >, parcel::TypedMapCellTypeDescriptor< T >, parcel::StructCellTypeDescriptor< Derived, Payload >, and parcel::UnionCellTypeDescriptor< Ts >.

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

• include/parcel/descriptor.h