On Sun, Jul 1, 2012 at 1:19 PM, Marc Feeley <[email protected]> wrote: > 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: 6.13.1. Ports > > Summary: Bidirectional ports and port-open? > > R7RS states that an implementation of Scheme may have bidirectional > ports (because the input and output port types may not be disjoint). > Bidirectional ports may be useful to represent operating devices such > as serial ports, terminals, and network connections. On some of these > ports it is useful to close the input and output sides separately > (for example closing the output side of a network connection on > which a request was sent, while leaving the input side open to > receive the response). > > For this reason, the procedure port-open? is not very informative for > bidirectional ports. It would be better to separate this into two > procedures so that each direction can be tested independently: > > (input-port-open? port) > (output-port-open? port)
Good point, formal comment ticket #439 created. -- Alex _______________________________________________ Scheme-reports mailing list [email protected] http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports
