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| ☜ | $IOREFERENCEDraft MDC Standard | ☞ |
$IOR[EFERENCE]
identifies the current I/O device (see 8.2.7 and 8.2.35). Its
value has the syntax of devn with the following
restrictions:
- When a process is initiated, but before any commands are
processed, the value of $IOReference is equal to the value
of $Principal if an implicit Open and Use
for the device specified by $Principal is executed by the
implementation. If the implementation does not execute these
Open and Use commands then $IOReference is
given the value of the empty string.
- If the last command that changed $IOReference included
an environment, then the value returned by
$IOReference shall include that environment;
otherwise the value of $IOReference shall not include an
environment.
- An environment whose value has the form of a number as
defined in 7.1.4.3 appears as a numlit, spelled as its
numeric interpretation.
- An environment whose value does not have the form of a
number as defined in 7.1.4.3 appears as a strlit.
Copyright © Standard Documents; 1977-2024 MUMPS Development Committee;
Copyright © Examples: 1995-2024 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2024 Ed de Moel.
Some specifications are "approved
for inclusion in a future standard". Note
that the MUMPS Development Committee cannot
guarantee that such future standards will
indeed be published.
This page most recently updated on 28-Nov-2011, 21:03:45.
For comments, contact Ed de Moel (demoel@jacquardsystems.com)