Next: scheme library form conflicts, Previous: scheme library form import, Up: scheme library form [Index]
A ?version-reference specifies a set of ?versions that it matches. The ?library-reference identifies all libraries of the same name and whose version is matched by the ?version-reference. A ?version-reference has the following form:
(?sub-version-reference1 ... ?sub-version-referenceN) (and ?version-reference ...) (or ?version-reference …) (not ?version-reference)
A ?version-reference of the first form matches a ?version
with at least n elements, whose ?sub-version-references
match the corresponding ?sub-versions. An and
?version reference matches a version if all
?version-references following the and match it.
Correspondingly, an or ?version-reference matches a version
if one of ?version-references following the or matches it,
and a not ?version-reference matches a version if the
?version-reference following it does not match it.
A ?sub-version-reference has one of the following forms:
?sub-version (>= ?sub-version) (<= ?sub-version) (and ?sub-version-reference …) (or ?sub-version-reference …) (not ?sub-version-reference)
A ?sub-version-reference of the first form matches a
?sub-version if it is equal to it. A >=
?sub-version-reference of the first form matches a sub–version if
it is greater or equal to the ?sub-version following it;
analogously for <=. An and ?sub-version-reference
matches a sub–version if all of the subsequent
?sub-version-references match it.
Correspondingly, an or ?sub-version-reference matches a
sub–version if one of the subsequent ?sub-version-references
matches it, and a not ?sub-version-reference matches a
sub–version if the subsequent ?sub-version-reference does not
match it.
Examples:
| version reference | version | match? |
|---|---|---|
() | (1) | yes |
(1) | (1) | yes |
(1) | (2) | no |
(2 3) | (2) | no |
(2 3) | (2 3) | yes |
(2 3) | (2 3 5) | yes |
(or (1 (>= 1)) (2)) | (2) | yes |
(or (1 (>= 1)) (2)) | (1 1) | yes |
(or (1 (>= 1)) (2)) | (1 0) | no |
((or 1 2 3)) | (1) | yes |
((or 1 2 3)) | (2) | yes |
((or 1 2 3)) | (3) | yes |
((or 1 2 3)) | (4) | no |
Next: scheme library form conflicts, Previous: scheme library form import, Up: scheme library form [Index]