I've just published draft #7 of SRFI 196. It was submitted by Wolfgang Corcoran-Mathe, co-author of the SRFI.

Here are Wolfgang's comments on the draft:

These commits specify and implement a new draft of SRFI 196. Many existing procedures now take multiple ranges, and several new forms have been added.

Here is the commit summary:

• redefinition of split-at
• changed to range-first and range-last; added vector->range
• Remove duplicate vector->range definition.
• Rename range-first/-last in tests.
• added -map, -filter, -remove that produce vectors and ranges
• Additional iteration procedures.
• Tests: Minor style changes.
• Import or define vector-unfold and use it in range->vector.
• Edit type checks.
• subrange: Assume (- end start) is >= 0.
• explain about ranges with vectors inside
• Add range-filter and range-remove.
• Folds take multiple ranges; switch argument order.
• range-count: multiple ranges.
• range-any, range-every: Accept multiple ranges.
• Type checks in fold utility procedures.
• Delete redundant type checks.
• range-count: Don't use case-lambda.
• Add missing type checks.
• Mapping procedures accept multiple ranges.
• range-fold-right: Fix proc application error.
• Add and use `minimum' utility procedure.
• range-for-each: Accept multiple ranges.
• range-index(-right): Accept multiple ranges.
• removed range-indexer
• Don't export range-indexer.
• Add filter-map procedures, but don't export yet.
• error to modify results
• Add range-append.
• Export filter-map procedures.
• modification of range->list result not an error
• Improve range-append implementation, add tests.
• Use raw constructor in range-append.
• editorial; range-append
• Add range=?.
• Tests: variadic case of range=?.
• range=?
• Simplify some tests by using range=?, range-append.
• added pred to range=?
• Tests for variadic cases of several procedures.
• Tests for filter-map procedures.
• Remove range-filter-map->vector.
• Tests for variadic cases of filter-map procedures.
• Fix typos and remove garbage characters.
• More detail for range=?.
• range=? takes one or more arguments.
• Expand specs for iterators taking multiple ranges.
• Specify range-filter-map and range-filter-map->list.
• range-index(-right): Document multiple-range semantics.
• Update implementation requirements.
• Remove range-{filter, remove}->vector.
• Add notations subsection to Specification.
• Fix typo.
• Fix errors reported by W3C HTML Validator.
• Publish seventh draft.

Here's the diff:

https://github.com/scheme-requests-for-implementation/srfi-196/compare/draft-6..draft-7

Regards,


SRFI Editor