Un-do previous command
Syntax
undo [‑list] [‑quiet] [‑verbose]Returns
With -list, the list of undoable tasks.
Usage
| Name | Description |
|---|---|
[-list]
|
Show a list of undoable tasks |
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
Categories
Description
Important: The
undo and redo commands are intended for use in the Vivado IDE, and are not recommended for use in Tcl scripts to restore designs to a former state. To restore a design to a specific condition, you must write a design checkpoint using the write_checkpoint command, to be restored using read_checkpoint.Undo a prior command. This command can be used repeatedly to undo a series of commands.
If a group of commands has been created using the startgroup and endgroup commands, this command will undo that group as a sequence. The undo command will start at the endgroup command and continue to undo until it hits the startgroup command.
If you undo a command, and then change your mind, you can redo the command.
Arguments
-list - (Optional) Reports the list of commands that can be undone. As you execute the undo command, the tool will step backward through this list of commands.
-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the
set_msg_config command.Examples
The following example returns a list of commands that you can undo:
undo -list