Re: Ignore break line sometimes

On 2/11/2012 8:56 AM, Geovani de Souza wrote:
> Hi all!
>
> I'm trying write an parser to my compiler, and I'm interessed to
> ignore the break line (\n) sometimes. E.g:
>
> if true then [\n] foo(); [\n] end; [\n]
>
> So, in the first line, the '\n' after 'then' isn't important, but in
> the second "foo();" could replace the need of the semicolon to
> conclude the statement, or still, in the 'end'.


It sounds like you want something like ECMAScript's magic
you-don't-always-need-a-semicolon feature.
<http://bclary.com/2004/11/07/#a-7.9> describes how it works in detail.
The thrust of it is that "if you see an invalid token, but you saw a
newline before, automatically insert a semicolon to fix things."


There are more than a few people who believe that this feature should
not have been implemented.


--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth

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