Method

expandMacro(_:arguments:bodyContent:)

Expands a macro invocation with the specified arguments.

@MainActor func expandMacro(_ macro: MTLMacro, arguments: [(any EcoreValue)?], bodyContent: MTLBlock? = nil) async throws

Parameters

macro: The macro to expand
arguments: The arguments matching the macro parameters
bodyContent: The captured body content (if macro has body parameter)

Discussion

Macros are language extension mechanisms that accept both regular parameters and captured body content.

Example

let macro = MTLMacro(
    name: "repeat",
    parameters: [MTLVariable(name: "count", type: "Integer")],
    bodyParameter: "content",
    body: MTLBlock(statements: [
        MTLForStatement(
            binding: MTLBinding(...),
            body: MTLBlock(statements: [
                // Execute captured content here
            ])
        )
    ])
)

try await generator.expandMacro(
    macro,
    arguments: [3],
    bodyContent: MTLBlock(statements: [
        MTLTextStatement(value: "Repeated line")
    ])
)