Programmer Guide/Command Reference/GOTO: Difference between revisions
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Continue macro execution at the label <var>label</var>. With the argument <var>fallback_label</var> a second label can be specified which is used as the target should the primary target, <code>label</code>, be undefined. | Continue macro execution at the label <var>label</var>. With the argument <var>fallback_label</var> a second label can be specified which is used as the target should the primary target, <code>label</code>, be undefined. | ||
Often, the <code>GOTO</code> command is used with a variable label to implement a switch-like control structure. In this case, <var>fallback_label</var> has the role of the default switch clause. | Often, the <code>GOTO</code> command is used with a variable label to implement a <code>switch</code>-like control structure. In this case, <var>fallback_label</var> has the role of the <code>default</code> switch clause. | ||
If both <var>label</var>, and <var>default_label,</var> are undefined, an error is generated and macro execution terminates. | If both <var>label</var>, and <var>default_label,</var> are undefined, an error is generated and macro execution terminates. | ||
<!-- C.G. 31.3.2011 --> | <!-- C.G. 31.3.2011 --> | ||
Revision as of 13:20, 31 March 2011
GOTO label [fallback_label]
Continue macro execution at the label label. With the argument fallback_label a second label can be specified which is used as the target should the primary target, label, be undefined.
Often, the GOTO command is used with a variable label to implement a switch-like control structure. In this case, fallback_label has the role of the default switch clause.
If both label, and default_label, are undefined, an error is generated and macro execution terminates.
