Re: Lua syntax gotcha

[Doug Rogers <doug.rogers@...>]

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:
> >
> > function test2()
> >    print(1)
> >    return;
> >    print(2)
> > end
> 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 
reminder.

Doug


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