toast::FieldInfo Struct Reference

Runtime descriptor for one reflected field. More...

#include <reflect.hpp>

Public Types
using	FieldGetterPtr = std::any (*)(void*)
using	FieldSetterPtr = void (*)(void*, std::any)

Public Member Functions
auto	attributeMap () const -> const nlohmann::json *
	Returns the generated attribute objectpr.
auto	groupName () const -> std::string
	Returns the value of the "Group" annotation, or an empty string if not present.
auto	hasAttribute (std::string_view attr_name) const -> bool
	Checks whether a JSON annotation key is present on this field.
auto	getAttribute (std::string_view attr_name) const -> std::string
	Returns the first string value of a JSON annotation.

Public Attributes
std::string_view	name
std::string_view	type
FieldType	value_type
nlohmann::json	attributes
bool	is_array = false
FieldGetterPtr	get
FieldSetterPtr	set

Detailed Description

Runtime descriptor for one reflected field.

Holds type metadata, JSON attributes parsed from the header annotation (e.g. Group, Name), and a type-erased getter/setter pair that works without knowing the concrete Node subtype.

Note

The getter returns std::any; the setter silently does nothing on a type mismatch

Member Function Documentation

getAttribute()

auto toast::FieldInfo::getAttribute ( std::string_view attr_name ) const -> std::string

inlinenodiscard

Returns the first string value of a JSON annotation.

Parameters

attr_name

The annotation key to look up

Returns

The first string element, or an empty string if the key is absent or has no elements

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hasAttribute()

auto toast::FieldInfo::hasAttribute ( std::string_view attr_name ) const -> bool

inlinenodiscard

Checks whether a JSON annotation key is present on this field.

Parameters

attr_name

The annotation key, e.g. "Group" or "Name"

Returns

true if the attribute exists, regardless of its value

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

• engine/src/toast/reflect/reflect.hpp