FileManagerLib bug


(Shane Stanley) #21

You’re seeing AppleScript in action. When the if exists... line is called, AppleScript’s result is first set to the NSURL of targetFile in the firstLine of the handler it calls:

on exists object aFileOrPath
	set aURL to my makeURLFromFileOrPath:aFileOrPath
	return (aURL's checkResourceIsReachableAndReturnError:(missing value)) as boolean
end exists object

Because the handler is called as part of an if statement, which do not return results, AppleScript’s result property remains unchanged, despite the actual result of the handler call being a boolean value.

This sort of thing can happen if either the return statement of a handler is followed by code rather than a variable as above, or where the handler has no return statement and its last line is code.

I’d take some convincing that it needs attending to. I could go through every handler and add an extra return line, but I’m not sure there’s any public benefit. I consider exposing quirks as educational :wink:


(Ed Stockly) #22

I now feel more educated. Thanks!