MTLTemplate

struct MTLTemplate

Overview

Templates are the primary text generation units in MTL, defining parameterized transformations from model elements to text. They can include guard conditions, post-conditions, and visibility controls for modular template libraries.

Overview

MTL templates provide:

• Parameterization: Type-safe parameters for template invocation

• Guards: Conditional execution based on runtime conditions

• Post-conditions: Validation of template execution results

• Visibility: Access control for template reuse

• Overriding: Template specialization in module hierarchies

• Main templates: Entry points for generation

Example Usage

// Simple template
let helloTemplate = MTLTemplate(
    name: "sayHello",
    parameters: [MTLVariable(name: "name", type: "String")],
    body: MTLBlock(statements: [
        MTLTextStatement(value: "Hello, "),
        MTLExpressionStatement(expression: MTLExpression(AQLVariableExpression(name: "name"))),
        MTLTextStatement(value: "!")
    ])
)

// Template with guard
let guardedTemplate = MTLTemplate(
    name: "generateClass",
    parameters: [MTLVariable(name: "class", type: "Class")],
    guard: MTLExpression(AQLNavigationExpression(
        source: AQLVariableExpression(name: "class"),
        property: "isPublic"
    )),
    body: classBody
)

// Main template (entry point)
let mainTemplate = MTLTemplate(
    name: "main",
    parameters: [MTLVariable(name: "model", type: "Model")],
    body: mainBody,
    isMain: true
)