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Date: Thu, 19 Jul 2012 12:04:58 +0200
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To: Charlie Somerville <charlie@charliesomerville.com>
Cc: Paul Dragoonis <dragoonis@gmail.com>, internals@lists.php.net
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Subject: Re: [PHP-DEV] Make try/catch brackets optinal
From: listas@rafaeldohms.com.br (Rafael Dohms)

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On Thu, Jul 19, 2012 at 11:58 AM, Charlie Somerville <
charlie@charliesomerville.com> wrote:

>
> On Thursday, 19 July 2012 at 7:49 PM, Paul Dragoonis wrote:
>
> > Why is your try block only going to contain 1 line, and that's
> > throwing an exception??
> >
> > try
> > throw new Exception('foobar');
> > catch(Exception $e)
> >
> >
>
> Because it's a contrived example. He's not trying to write real code, he's
> trying to demonstrate his point - and you totally missed that point.
>
>
In this case the removal of brackets would surely limit this to one line,
so any examples or use cases would look the same.


> > Braces are a good thing, they give structure and stop people from
> > mis-reading things and writing bugs, the same can be said for the if()
> > situation.
> >
> > 1) Braces are good.
> This is subjective. There are some cases where it might improve code
> readability to drop the braces for a single-statement try/catch.
>
>
It would cause code maintainability problems and unexpected outputs in
error cases, just like if's do.


>
> There's certainly no technical barrier to doing this. I'm not familiar
> with PHP's parser, but I'd imagine there would be some kind of 'statement'
> non-terminal that would handle single statements as well as a braced group
> of statements.
>
> > 2) Try with only one line in it to throw an exception doesn't seem
> > like a realistic situation.
> >
> >
>
> There could be some utility to this. For example, as well as having
> post-fix if, unless, etc., Ruby also has a post-fix 'rescue'. Here's a
> silly example of its use:
>
>
>     some_var = foo.bar rescue "oops"
>
> If 'foo.bar' threw an exception, some_var would contain "oops" instead.
>

a rescue method is a complete other thing, sounds interesting, but has no
reference to bracket-less try blocks.


>
> I think PHP could benefit from having a single statement try form. I often
> turn to PHP for quick and dirty scripts when I need to do something with
> little fuss. I think having try/catch support brace-less single statements
> would help increase consistency in PHP's syntax, as well as be useful in
> certain situations.
>

I think bracket-less is a bad practice that was left for BC, i would rather
we move away from it then move more things into it.

-- 
Rafael Dohms
PHP Evangelist and Community Leader
http://www.rafaeldohms.com.br
http://www.phpsp.org.br

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