☜	$QSUBSCRIPT Draft MDC Standard					☞

7.1.5.18 $QSubscript

$QS[UBSCRIPT] ( namevalue , intexpr )

This form returns a value which is derived from namevalue. If namevalue has the form NAME( s₁ , s₂ , ... , s_n ), considering n to be zero if there are no subscripts, and m is the value of intexpr, then $QSubscript( namevalue , intexpr) is defined as follows:

1. Values of m less than 1 are reserved for possible future extensions to the standard.
2. If m = –1, the result is the environment if namevalue includes an environment; otherwise the empty string.
3. If m = 0, the result is NAME without an environment even if one is present.
4. If m > n, the result is the empty string.
5. Otherwise, the result is the subscript value denoted by s_m.

Note that the namevalue is not "executed", and will not affect the naked indicator, nor generate an error if the namevalue represents an undefined glvn. The parameters are evaluated in left to right order, and the naked indicator will only be affected by the last gvn reference (if any) executed while evaluating them.

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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 12-Sep-2014, 13:28:30.

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