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- Subject: Re: Lua syntax gotcha
- From: Doug Rogers <doug.rogers@...>
- Date: Mon, 26 Oct 2009 15:11:47 -0400
Luiz Henrique de Figueiredo wrote:
Yes, I can see myself spending time tracking down such a thing. I'll try
to remember to use a semicolon when I add debug code like that:
This code does not compile: "return" must be the last statement in the block.
So you need to use this instead: "do return end". No semicolon is needed.
Yes, believe it or not, I checked that it did NOT compile before posting it!
What I was trying to say was that if I used a semicolon there, the
compiler would notice that I was attempting to run code beyond the
'return', so I would not reach the point of being surprised by the
behavior. For some reason it felt more natural to remember to add a
semicolon (and then fix it after it fails to compile) than to remember
the 'do return end' construct.
These kinds of cross-line parsing issues don't come up too often for me.
When I want to continue something on the next line, I just make sure
that an expression or statement is incomplete so that more text must be
read. But 'return' can appear with or without a following expression, so
that's a case where I need to be more careful. David's post was a good
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