ATLCalledRule

struct ATLCalledRule

Overview

Called rules provide imperative control flow within ATL’s primarily declarative framework. They are executed explicitly through rule invocation expressions and support parameterised transformations that cannot be expressed through pattern matching alone.

Overview

Called rules offer several capabilities:

• Explicit invocation: Called through rule invocation expressions

• Parameterisation: Accept multiple input parameters beyond pattern matching

• Flexible output: Can create multiple target elements with complex relationships

• Imperative logic: Support sequential statement execution and control structures

Example Usage

let createPersonRule = ATLCalledRule(
    name: "CreatePerson",
    parameters: [
        ATLParameter(name: "member", type: "Families!Member"),
        ATLParameter(name: "isMale", type: "Boolean")
    ],
    targetPatterns: [
        ATLTargetPattern(
            variableName: "person",
            type: "Persons!Person",
            bindings: ["name": nameExpression]
        )
    ],
    body: [assignmentStatement, conditionalStatement]
)