SEND(9)                                                   SEND(9)

     NAME
          send - send a value down a Tk channel

     SYNOPSIS
          send chan string

     DESCRIPTION
          Send is the gateway from the Tk world into the Limbo world.
          It sends string down chan, which should previously have been
          named with a call to namechan (see tk(2)). Tk channels are
          non blocking, so the call will return immediately, whether
          the message has been sent or not. If too many messages have
          been queued on the chan, then the message will be discarded,
          and a warning printed on the console.  String is not subject
          to interpretation by the usual Tk quoting rules.

     BUGS
          String is not subject to interpretation by the usual Tk
          quoting rules.  This means, for example that:
               radiobutton .x -text X -variable x -value x
               radiobutton .y -text Y -variable y -value y
               button .z -text Submit {send chan submit [variable X]}
          will not work as expected. Instead, one must interrogate
          values directly in Limbo.

          The specialised queued channels will be replaced by buffered
          channels in Limbo in a future edition of Inferno.