[context]

context is a core slot, one of the keywords of the Hyperlambda language, in Hyperlambda, the language of Magic Cloud. Creates a named stack context object retrievable with [get-context] while evaluating a lambda block.

• Value (context-name), required: Context name to create on the stack while evaluating the lambda block
• Scope: provides context - Creates a named context scope retrievable by [get-context] using the same input value

Arguments

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

Argument	Type	Required	Description
[value]	object	yes	Value stored in the named stack context.
[.lambda]	lambda	yes	Body evaluated while the context value is scoped.

Guide: How to use [context]

JSON declaration

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

JSON declaration

{
  "name": "context",
  "description": "Creates a named stack context object retrievable with [get-context] while evaluating a lambda block",
  "signature": {
    "input": {
      "kind": "context-name",
      "description": "Context name to create on the stack while evaluating the lambda block",
      "required": true,
      "mode": "ValueOrExpression"
    },
    "children": {
      "value": {
        "type": "object",
        "description": "Value stored in the named stack context",
        "required": true,
        "mode": "ValueOrExpression",
        "cardinality": "ExactlyOne",
        "role": "Option",
        "projection": "Value"
      },
      ".lambda": {
        "type": "lambda",
        "description": "Body evaluated while the context value is scoped",
        "required": true,
        "mode": "ExecutableLambda",
        "cardinality": "ExactlyOne",
        "role": "LambdaBlock",
        "evaluation": "EvalBlock",
        "projection": "Self"
      }
    },
    "scope": {
      "provides": "context",
      "description": "Creates a named context scope retrievable by [get-context] using the same input value"
    }
  }
}

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