(srfi : 43 vectors) - vector-reverse-copy! incorrect when source=target and tstart=sstart

Bug #595513 reported by Peter Lane
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Scheme Libraries

Bug Description

Small inconsistency with SRFI document:

> (import (srfi :43))
> (define b (vector 1 2 3 4))
> (vector-reverse-copy! b 0 b 0)
> b
#(4 3 3 4)

SRFI documentation says start=target & tstart=sstart means behaviour should be same as vector-reverse!

racket and sisc return #(4 3 2 1) for above example.

Suggest fix in 'vector-lib.scm'

add "((and (eq? target source) (= sstart tstart)) (vector-reverse! target tstart send))"
as first clause of 'cond' in 'vector-reverse-copy!'

Changed in scheme-libraries:
importance: Undecided → High
assignee: nobody → Derick Eddington (derick-eddington)
Changed in scheme-libraries:
assignee: Derick Eddington (derick-eddington) → nobody
Peter Lane (peterlane)
Changed in scheme-libraries:
status: New → Fix Committed
description: updated
Revision history for this message
Göran Weinholt (weinholt) wrote :

FWIW, this SRFI collection still lives, here: https://github.com/arcfide/chez-srfi

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