Similar to invoke-unit. However, instead of returning the value of the unit's initialization expression, define-values/invoke-unit expands to a define-values expression that binds each identifier export-id to the value of the corresponding variable exported by the unit. At run time, if the unit does not export all of the export-ids, the exn:unit exception is raised.
If prefix is specified, it must be either #f or an identifier. If it is an identifier, the names defined by the expansion of define-values/invoke-unit are prefixed with prefix:.
(define x 3)
(define y 2)
(unit (import a b)
(define c (- a b)))
ex:c ; => 1
The signed-unit version of define-values/invoke-unit. The names defined by the expansion of define-values/invoke-unit/sig are determined by flattening the signature specified before unit-expr, then adding the prefix (if any). See section 126.96.36.199 for more information about signature flattening.
Each invoke-linkage is either signature or (identifier : signature), as in invoke-unit/sig.
Like define-values/invoke-unit, but the expansion is a sequence of calls to global-defined-value instead of a define-values expression. Thus, when it is evaluated, a global-define-values/invoke-unit expression binds top-level variables in the current namespace.
The signed-unit version of global-define-values/invoke-unit. See also define-values/invoke-unit/sig.