Difference between revisions of "Forth Lesson 15/Example/Scope"
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Latest revision as of 02:17, 11 October 2012
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.