Channels ▼
RSS

C/C++

Hierarchical State Machine Design in C++


December, 2005: Hierarchical State Machine Design in C++

Figure 2: A sample run that shows what's going on, generated by the announcer class template.

class Pelican::pedestriansFlash +(this=0x411bb9)->
  vehiclesEnabled::on_enter->vehiclesGreen::on_enter
class Pelican::vehiclesGreenInt derives from class Pelican::vehiclesGreen ?
  -NO->vehiclesGreen::on_exit
class Pelican::vehiclesGreenInt derives from class Pelican::vehiclesEnabled ?
  -YES-stay in vehiclesEnabled
class Pelican::vehiclesGreen derives from class Pelican::vehiclesGreenInt ?-NO
class Pelican::vehiclesGreen derives from class Pelican::vehiclesEnabled ?
  -YES-already in vehiclesEnabled->vehiclesGreenInt::on_enter
class Pelican::vehiclesYellow derives from class Pelican::vehiclesEnabled ?
  -YES-stay in vehiclesEnabled
class Pelican::vehiclesGreenInt derives from class Pelican::vehiclesYellow ?-NO
class Pelican::vehiclesGreenInt derives from class Pelican::vehiclesEnabled ?
  -YES-already in vehiclesEnabled->vehiclesYellow::on_enter
class Pelican::pedestriansWalk derives from class Pelican::vehiclesYellow ?
  -NO->vehiclesYellow::on_exit
class Pelican::pedestriansWalk derives from class Pelican::vehiclesEnabled ?
  -NO->vehiclesEnabled::on_exit
class Pelican::vehiclesYellow derives from class Pelican::pedestriansWalk ?-NO
class Pelican::vehiclesYellow derives from class Pelican::pedestriansEnabled ?
  -NO->pedestriansEnabled::on_enter->pedestriansWalk::on_enter
class Pelican::pedestriansFlash derives from class Pelican::pedestriansWalk ?
  -NO->pedestriansWalk::on_exit
class Pelican::pedestriansWalk derives from class Pelican::pedestriansFlash ?-NO
class Pelican::pedestriansWalk derives from class Pelican::pedestriansEnabled ?
  -YES-already in pedestriansEnabled->pedestriansFlash::on_enter
class Pelican::vehiclesGreen derives from class Pelican::pedestriansFlash ?
  -NO->pedestriansFlash::on_exit
class Pelican::pedestriansFlash derives from class Pelican::vehiclesGreen ?-NO
class Pelican::pedestriansFlash derives from class Pelican::vehiclesEnabled ?
  -NO->vehiclesEnabled::on_enter-


Related Reading


More Insights






Currently we allow the following HTML tags in comments:

Single tags

These tags can be used alone and don't need an ending tag.

<br> Defines a single line break

<hr> Defines a horizontal line

Matching tags

These require an ending tag - e.g. <i>italic text</i>

<a> Defines an anchor

<b> Defines bold text

<big> Defines big text

<blockquote> Defines a long quotation

<caption> Defines a table caption

<cite> Defines a citation

<code> Defines computer code text

<em> Defines emphasized text

<fieldset> Defines a border around elements in a form

<h1> This is heading 1

<h2> This is heading 2

<h3> This is heading 3

<h4> This is heading 4

<h5> This is heading 5

<h6> This is heading 6

<i> Defines italic text

<p> Defines a paragraph

<pre> Defines preformatted text

<q> Defines a short quotation

<samp> Defines sample computer code text

<small> Defines small text

<span> Defines a section in a document

<s> Defines strikethrough text

<strike> Defines strikethrough text

<strong> Defines strong text

<sub> Defines subscripted text

<sup> Defines superscripted text

<u> Defines underlined text

Dr. Dobb's encourages readers to engage in spirited, healthy debate, including taking us to task. However, Dr. Dobb's moderates all comments posted to our site, and reserves the right to modify or remove any content that it determines to be derogatory, offensive, inflammatory, vulgar, irrelevant/off-topic, racist or obvious marketing or spam. Dr. Dobb's further reserves the right to disable the profile of any commenter participating in said activities.

 
Disqus Tips To upload an avatar photo, first complete your Disqus profile. | View the list of supported HTML tags you can use to style comments. | Please read our commenting policy.
 

Video