Class Canonicalisation

Scripts/codegen/generate_ue_components.py:1036–1043

One canonicalisation's import + export emitters. Looked up by canon name from `codegen_rules.json[canonicalizations]`. The importer takes (canon_def, element_name) and returns C++ text; the exporter takes (canon_def) and returns C++ text.

@dataclass(frozen=True)
class Canonicalisation:
    """One canonicalisation's import + export emitters. Looked up by
    canon name from `codegen_rules.json[canonicalizations]`. The
    importer takes (canon_def, element_name) and returns C++ text;
    the exporter takes (canon_def) and returns C++ text."""
    name:   str
    import_emitter: Callable[[Dict[str, Any], str], str]
    export_emitter: Callable[[Dict[str, Any]], str]


_CANONICALISATIONS: Dict[str, Canonicalisation] = {