Tool Command Language: 1 Using This Chapter

This chapter provides the information needed to write a new Swat command in Tcl. But, new commands need only be written in certain situations. Some of the situations in which it is advantageous to write a new Swat command in Tcl are:

There is complex task that is being repeated often. For example, if one is continually examining a certain piece of data in memory but has to go through many steps to do so, then it is helpful to write a single command to perform all of the needed steps.
When a new data-structure is created for an application. For example, if one creates a look-up table for the application, then a Tcl command should be written to examine that table in particular.

The existing Swat commands should take care of the bulk of debugging, but sometimes an extra command can help.

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