Stateflow User's Guide

Parsing Stateflow Diagrams

When you begin a build for a target as described in Starting the Build, the parser evaluates the graphical and nongraphical objects in each Stateflow machine against the supported Stateflow notation and the action language syntax. This section describes the Stateflow parser and how its messages appear with the following topics:

• Calling the Stateflow Parser -- Shows you how to call the Stateflow Parser to parse your current diagram at any time.
• Parser Error Checking -- Lists the types of errors that Stateflow parses the diagram for.
• Parsing Diagram Example -- Gives you an example of parsing an example Stateflow diagram with a parsing error.

Calling the Stateflow Parser

Apart from building a target, you can call the Stateflow parser to check the syntax of your Stateflow diagrams in one of the following ways:

• Parse an individual Stateflow diagram in the Stateflow diagram editor by selecting Parse Diagram from the Tools menu.
• Parse a Stateflow machine, that is, all the Stateflow charts in a model, by selecting Parse from the Tools menu in the Stateflow diagram editor.
• When you simulate a model, build a target, or generate code, the Stateflow machine is automatically parsed.

In all cases, the Stateflow Builder window displays when parsing is complete. If parsing is unsuccessful (that is, an error is detected), the Stateflow diagram editor automatically appears with the highlighted object causing the first parse error. In the Stateflow Builder window, each error is displayed with a leading red button icon. You can double-click any error in this window to bring its source Stateflow diagram to the front with the source object highlighted. See Parsing Diagram Example for example displays of parsing results in the Stateflow Builder window.

Note    Parsing informational messages are also displayed in the MATLAB Command Window.

Starting the Build

Parser Error Checking

© 1994-2005 The MathWorks, Inc.