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unit/ new-import-export
define-unit/ new-import-export
unit/ s
define-unit/ s
Version: 4.2.1

6.6 Structural Matching

(unit/new-import-export
  (import tagged-sig-spec ...)
  (export tagged-sig-spec ...)
  init-depends-decl
  ((tagged-sig-spec ...) unit-expr tagged-sig-spec))
Similar to unit, except the body of the unit is determined by an existing unit produced by unit-expr. The result is a unit that whose implementation is unit-expr, but whose imports, exports, and initialization dependencies are as in the unit/new-import-export form (instead of as in the unit produced by unit-expr).

The final clause of the unit/new-import-export form determines the connection between the old and new imports and exports. The connection is similar to the way that compound-unit propagates imports and exports; the difference is that the connection between import and the right-hand side of the link clause is based on the names of elements in signatures, rather than the names of the signatures. That is, a tagged-sig-spec on the right-hand side of the link clause need not apppear as a tagged-sig-spec in the import clause, but each of the bindings implied by the linking tagged-sig-spec must be implied by some tagged-sig-spec in the import clause. Similarly, each of the bindings implied by an export tagged-sig-spec must be implied by some left-hand-side tagged-sig-spec in the linking clause.

(define-unit/new-import-export unit-id
  (import tagged-sig-spec ...)
  (export tagged-sig-spec ...)
  init-depends-decl
  ((tagged-sig-spec ...) unit-expr tagged-sig-spec))
Like unit/new-import-export, but binds static information to unit-id like define-unit.

(unit/s
  (import tagged-sig-spec ...)
  (export tagged-sig-spec ...)
  init-depends-decl
  unit-id)
Like unit/new-import-export, but the linking clause is inferred, so unit-id must have the appropriate static information.
(define-unit/s name-id
  (import tagged-sig-spec ...)
  (export tagged-sig-spec ...)
  init-depends-decl
  unit-id)
Like unit/s, but binds static information to name-id like define-unit.