6.12 Transformer Helpers
| (require racket/unit-exptime) |
The racket/unit-exptime library provides procedures that are intended for use by macro transformers. In particular, the library is typically imported using for-syntax into a module that defines macro with define-syntax.
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| unit-identifier : identifier? | ||||||||||
| err-syntax : syntax? |
If unit-identifier is not bound to static unit information, then the exn:fail:syntax exception is raised. In that case, the given err-syntax argument is used as the source of the error, where unit-identifer is used as the detail source location.
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| sig-identifier : identifier? | ||||||||||||||||||
| err-syntax : syntax? |
an identifier or #f indicating the signature (of any) that is extended by the sig-identifier binding;
a list of identifiers representing the variables supplied/required by the signature;
a list of identifiers for variable definitions in the signature (i.e., variable bindings that are provided on import, but not defined by units that implement the signature); and
a list of identifiers with syntax definitions in the signature.
If sig-identifier is not bound to a signature, then the exn:fail:syntax exception is raised. In that case, the given err-syntax argument is used as the source of the error, where sig-identifier is used as the detail source location.