[whitelist]

whitelist is a core slot, one of the keywords of the Hyperlambda language, in Hyperlambda, the language of Magic Cloud. Evaluates a lambda with a restricted whitelist of allowed slots.

• Returns: Resolves to the evaluated lambda’s value result and any returned child nodes
• Scope: provides whitelist

Arguments

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

Argument	Type	Required	Description
[vocabulary]	lambda	yes	Allowed slot names for the restricted evaluation scope.
[vocabulary] / any node name	string	yes	Allowed native slot name (e.g. add, set-value, if) that the body is permitted to invoke. Can be repeated.
[.lambda]	lambda	yes	Executable lambda block.

Guide: How to use [whitelist]

JSON declaration

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

JSON declaration

{
  "name": "whitelist",
  "description": "Evaluates a lambda with a restricted whitelist of allowed slots",
  "signature": {
    "children": {
      "vocabulary": {
        "type": "lambda",
        "description": "Allowed slot names for the restricted evaluation scope",
        "required": true,
        "mode": "Value",
        "cardinality": "ExactlyOne",
        "role": "StructuredObject",
        "projection": "Children",
        "children": {
          "*": {
            "type": "string",
            "kind": "native-slot-name",
            "description": "Allowed native slot name (e.g. add, set-value, if) that the body is permitted to invoke",
            "required": true,
            "mode": "Value",
            "cardinality": "OneOrMore",
            "role": "DynamicMap",
            "projection": "Value"
          }
        }
      },
      ".lambda": {
        "type": "lambda",
        "description": "Executable lambda block",
        "required": true,
        "mode": "ExecutableLambda",
        "cardinality": "ExactlyOne",
        "role": "LambdaBlock",
        "evaluation": "EvalBlock",
        "projection": "Self"
      }
    },
    "scope": {
      "provides": "whitelist"
    },
    "output": {
      "mode": "Both",
      "kind": "lambda-result",
      "description": "Resolves to the evaluated lambda's value result and any returned child nodes"
    }
  }
}

---

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