payloadEqualityTraits

Functions

template<typename T>
bool supportsPayloadEquality() noexcept

Returns true if a field-wise equality comparison is defined for payload type T.

template<typename T>
bool payloadsAreEqual(const T &lhs, const T &rhs)

Compare two payloads field-wise.

Will not compile for payload types that lack a PayloadEqualityTraits<T> specialization. Guard calls with supportsPayloadEquality<T>() via if constexpr, or add a specialization.

template<typename T>
struct PayloadEqualityTraits

#include <payloadEqualityTraits.h>

Primary template: equality comparison not supported for this payload type by default.

To enable recordOnChange() for a payload type, provide a specialization either:

• automatically, via generatePayloadEqualityHeader.py (for fully-supported struct fields), or

• manually, as a PayloadEqualityTraits<T> specialization in the payload header file (guarded by #ifdef __cplusplus) when the comparison semantics can be defined safely.

Public Static Attributes

static bool supported = false

Indicates whether equality comparison is supported for this payload type.