- (import IMPORT-SET ...)syntax
An import declaration provides a way to import identifiers exported by a library. Each <import set> names a set of bindings from a library and possibly specifies local names for the imported bindings. It takes one of the following forms:
- <library name>
- (only <import set> <identifier> ...)
- (except <import set> <identifier> ...)
- (prefix <import set> <identifier>)
- (rename <import set> (<identifier[1]> <identifier[2]>) ...)
In the first form, all of the identifiers in the named library’s export clauses are imported with the same names (or the exported names if exported with rename ). The additional <import set> forms modify this set as follows:
- only produces a subset of the given <import set> including only the listed identifiers (after any renaming). It is an error if any of the listed identifiers are not found in the original set.
- except produces a subset of the given <import set>, excluding the listed identifiers (after any renaming). It is an error if any of the listed identifiers are not found in the original set.
- rename modifies the given <import set>, replacing each instance of <identifier[1]> with <identifier[2]>. It is an error if any of the listed <identifier[1]>s are not found in the original set.
- prefix automatically renames all identifiers in the given <import set>, prefixing each with the specified <identifier>.