hiUndo

hiUndo( ) 
=> t / nil 

Description

Undoes the last user command that modified the database and that has not been undone by a previous hiUndo.

The number of hiUndo functions that can be performed in sequence is controlled by the User Preferences form or by using the hiSetUndoLimit function.

Not all commands that modify the database can be undone. Also hiUndo might not succeed for large designs because of memory limitations.

hiUndo undoes the latest sequential database modification without regard to which window it was performed in. (In other words, if Undo is selected from the menu of window X, it might undo a database operation performed in window Y, if that was the last operation performed.)

This function is not available in Concept SKILL. For more information, see Design Entry HDL–SKILL Routines.

Arguments

None.

Value Returned

t	An undo was successfully performed.
nil	The last command could not be undone.

Related Topics

hiSetUndoLimit

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