View source for Forth Lesson 15/Example/Scope

An example of how to use the scope keys.

''scan-wifi'' calls ''scan-subtree'', which calls ''wifi-children'' for each device node.

 : wifi-children 
    " device_type" get-property if
       exit 
    then
    get-encoded-string 
    " wireless-network" $= if
       " scan-wifi" method-name 2!            \ fda31c70 
       do-method? 
    then
 ;

Our goal is to step into the code inside the second ''if''.

 ok debug wifi-children
 ok scan-wifi

*first pass, the cursor will be on the first word, so step to the ''exit'' and press ''<'' to constrain the scope, then ''space'' to exit the definition,
*second pass, the cursor will be on the ''get-encoded-string'', so step to the second ''if'' and press ''<'' again to constrain the scope, then ''space'' until the definition exits,
*third pass, the cursor will be on the '';'', so press '')'' to constrain the end of the scope, then ''space'' to exit the definition.

On the fourth pass, the cursor will be on ''" scan-wifi"'' as desired.