[compose]

compose is a core slot, one of the keywords of the Hyperlambda language, in Hyperlambda, the language of Magic Cloud. Builds an expression at runtime by concatenating the evaluated child node values; useful for dynamic node selection.

• Returns: Resolves to the composed expression

Arguments

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

Argument	Type	Required	Description
any node name	string	yes	Expression segment evaluated and joined into the resulting expression. Can be repeated.

Guide: How to use [compose]

JSON declaration

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

JSON declaration

{
  "name": "compose",
  "description": "Builds an expression at runtime by concatenating the evaluated child node values; useful for dynamic node selection",
  "signature": {
    "children": {
      "*": {
        "type": "string",
        "kind": "expression-segment",
        "description": "Expression segment evaluated and joined into the resulting expression",
        "required": true,
        "mode": "ExecutableLambda",
        "cardinality": "OneOrMore",
        "role": "SourceExpression",
        "evaluation": "EvalSelf",
        "projection": "Value"
      }
    },
    "output": {
      "mode": "Value",
      "kind": "expression",
      "description": "Resolves to the composed expression"
    }
  }
}

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