Formal Comment

Submitter's name: Marc Feeley
Submitter's email: feeley at iro.umontreal.ca
Relevant draft: r7rs draft 6

Type: defect
Priority: major
Relevant section of draft: 6.7. Strings, 6.8. Vectors, 6.9. Bytevectors, 6.10. Control features

Summary: Generalization of append, map, and for-each to other sequences

R7RS has three vector-like data types: strings, vectors and
bytevectors.

The procedure

  (string-append string ...)

exists to concatenate strings, like append concatenates lists.
However there is no vector-append and bytevector-append which
concatenate vectors and bytevectors.

The procedures

  (string-map proc string1 string2 ...)
  (vector-map proc vector1 vector2 ...)

  (string-for-each proc string1 string2 ...)
  (vector-for-each proc vector1 vector2 ...)

are for strings and vectors what map and for-each are for lists.
There is no such procedures for bytevectors.

For consistency, these missing procedures should be added.

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