[throw]

throw is a core slot, one of the keywords of the Hyperlambda language, in Hyperlambda, the language of Magic Cloud. Aborts execution by throwing an exception with the given message; optionally attach status code and public flag.

• Value (exception-message,text), optional: Exception message to throw

Arguments

Required arguments come first, then the optional ones in the order they are declared.

Argument	Type	Required	Description
[public]	bool	no	Whether the exception message may be returned to clients. Default: false.
[status]	int	no	HTTP status code associated with the exception. Default: 500.
[field]	string	no	Optional form field or control ID associated with the exception.

Guide: How to use [throw]

JSON declaration

This is the complete declaration of throw, as the running system describes it. It is also published as slot.json.

JSON declaration

{
  "name": "throw",
  "description": "Aborts execution by throwing an exception with the given message; optionally attach status code and public flag",
  "signature": {
    "input": {
      "kind": "exception-message,text",
      "description": "Exception message to throw",
      "required": false,
      "mode": "ValueOrExpression"
    },
    "children": {
      "public": {
        "type": "bool",
        "description": "Whether the exception message may be returned to clients",
        "required": false,
        "mode": "ValueOrExpression",
        "cardinality": "ZeroOrOne",
        "default": "false",
        "role": "Option",
        "projection": "Value"
      },
      "status": {
        "type": "int",
        "kind": "http-status-code",
        "description": "HTTP status code associated with the exception",
        "required": false,
        "mode": "ValueOrExpression",
        "cardinality": "ZeroOrOne",
        "default": "500",
        "role": "Option",
        "projection": "Value"
      },
      "field": {
        "type": "string",
        "kind": "form-field-id",
        "description": "Optional form field or control ID associated with the exception",
        "required": false,
        "mode": "ValueOrExpression",
        "cardinality": "ZeroOrOne",
        "role": "Option",
        "projection": "Value"
      }
    }
  }
}

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