MTLExpression

struct MTLExpression

Overview

MTL expressions delegate all evaluation to the Acceleo Query Language (AQL), which provides a rich expression system for model navigation, collection operations, and standard library functions.

Overview

MTL uses AQL for all expression evaluation, including:

• Model navigation (e.g., object.property, object.reference)

• Collection operations (e.g., collection->select(), collection->collect())

• Arithmetic and logical operations

• String manipulation and interpolation

• Type checking and casting

Example Usage

// Literal expression
let literalExpr = MTLExpression(AQLLiteralExpression(value: "Hello"))

// Variable reference
let varExpr = MTLExpression(AQLVariableExpression(name: "model"))

// Navigation
let sourceExpr = MTLExpression(AQLVariableExpression(name: "element"))
let navExpr = MTLExpression(AQLNavigationExpression(
    source: sourceExpr.aqlExpression,
    property: "name"
))

// String interpolation
let interpolExpr = MTLExpression(AQLStringInterpolationExpression(
    parts: [
        AQLStringInterpolationExpression.Part(literal: "Name: "),
        AQLStringInterpolationExpression.Part(literal: "", expression: navExpr.aqlExpression)
    ]
))