On Tuesday, March 23, 2004, at 06:10 AM, [EMAIL PROTECTED] wrote:
From: Doug Lerner <[EMAIL PROTECTED]> Subject: is within - a syntax bug? To: How to use Revolution <[EMAIL PROTECTED]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="US-ASCII"
This results in a syntax error that "what is to the left of within" is not a
point:
addToStatus "within: " & the mouseLoc is within the rect of the target
into withinCheck
But rewriting it this way works:
put the mouseLoc is within the rect of the target into withinCheck addToStatus "within: " & withinCheck
A compiler bug?
doug
No, it's not a compiler bug.
Parsing happens left to right, so in your first statement the compiler first evaluated
addStatus "within:" &
and decided there was more to evaluate before it could call addStatus. Then it evaluated
the mouseLoc is within the rect of the target
For explanatory purposes, let's assume the intermediate result of this statement is "true".
then it tried to parse
addStatus "within:true"
and so it called addStatus with "within:true".
And finally it tried to put the result of the addStatus call into the variable withinCheck. But, as addStatus isn't a function the whole thing failed because addStatus didn't return anything.
Anytime you have a complicated expression it's better to use multiple statements (as you saw), or use parentheses to make sure the compiler does things in the order you intend.
Best, -- Frank
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