Function isEmpty

expr/http_endpoint.go:1164–1184

isEmpty returns true if an attribute is Empty type and it has no bases and references, or if an attribute is an empty object.

(a *AttributeExpr)

// isEmpty returns true if an attribute is Empty type and it has no bases and
// references, or if an attribute is an empty object.
func isEmpty(a *AttributeExpr) bool {
	if !IsObject(a.Type) {
		return false
	}
	if obj := AsObject(a.Type); obj != nil && len(*obj) != 0 {
		if a.Type == Empty {
			panic("Empty should have no attribute") // bug
		}
		return false
	}
	if len(a.Bases) != 0 || len(a.References) != 0 {
		return false
	}
	if ut, ok := a.Type.(UserType); ok {
		uatt := ut.Attribute()
		if len(uatt.Bases) != 0 || len(uatt.References) != 0 {
			return false
		}
	}
	return true
}

// hasJSONRPCIDField returns true if an attribute or any of its nested attributes
// has the "jsonrpc:id" meta tag, indicating it's designated as the JSON-RPC ID field.