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Left Hand Pointer

$STACK

M[UMPS] by Example

Right Hand Pointer

Introduced in the 1995 ANSI M[UMPS] language standard.

This variable indicates the current execution stack depth (Do level).
The difference between $STack and $EStack is that $EStack may appear as an argument of the New command. Newing $EStack resets its value to 0 (zero), and can be useful to set up a layered error trapping mechanism.

The value of $STack is "absolute" since the start of the M[UMPS] process, whereas the value of $EStack is "relative" to the most recent "anchoring point".

For examples of the use of special variable $STack, see the function $STack.

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Copyright © Standard Documents; 1977-2017 MUMPS Development Committee;
Copyright © Examples: 1995-2017 Ed de Moel;
Copyright © Annotations: 2003-2017 Jacquard Systems Research.

The information in this page is NOT authoritative and subject to be modified at any moment.
Please consult the appropriate (draft) language standard for an authoritative definition.

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 13-Sep-2014, 07:19:23 .

For comments, contact Ed de Moel (demoel@jacquardsystems.com)