Method HasInstanceData

value.go:1157–1177

HasInstanceData checks if the value has associated Go object data This is the most reliable way to identify our class instances

()

// HasInstanceData checks if the value has associated Go object data
// This is the most reliable way to identify our class instances
func (v *Value) HasInstanceData() bool {
	if v == nil || !v.hasValidContext() || v.ctx.handleStore == nil || !v.IsObject() {
		return false
	}

	// Get class ID first
	classID := C.JS_GetClassID(v.ref)

	// Use JS_GetOpaque2 for type-safe check (like point.c methods)
	opaque := C.JS_GetOpaque2(v.ctx.ref, v.ref, classID)
	if opaque == nil {
		return false
	}

	ownerCtx, handleID, ok := resolveClassObjectFromOpaque(v.ctx, opaque)
	if !ok || ownerCtx == nil || ownerCtx.handleStore == nil {
		return false
	}
	_, exists := ownerCtx.handleStore.Load(handleID)
	return exists
}

// IsInstanceOfClassID checks if the value is an instance of a specific class ID
// This provides type-safe class instance checking with double validation