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 $e)
>
>
Because it's a contrived example. He's not trying to write real code, he's
trying to demonstrate his point - and you totally missed that point.
> Braces are a good thing, they give structure and stop people from
> mis-reading things and writing bugs, the same can be said for the if()
> situation.
>
> 1) Braces are good.
This is subjective. There are some cases where it might improve code
readability to drop the braces for a single-statement try/catch.
There's certainly no technical barrier to doing this. I'm not familiar with
PHP's parser, but I'd imagine there would be some kind of 'statement'
non-terminal that would handle single statements as well as a braced group of
statements.
> 2) Try with only one line in it to throw an exception doesn't seem
> like a realistic situation.
>
>
There could be some utility to this. For example, as well as having post-fix
if, unless, etc., Ruby also has a post-fix 'rescue'. Here's a silly example of
its use:
some_var = foo.bar rescue "oops"
If 'foo.bar' threw an exception, some_var would contain "oops" instead.
I think PHP could benefit from having a single statement try form. I often turn
to PHP for quick and dirty scripts when I need to do something with little
fuss. I think having try/catch support brace-less single statements would help
increase consistency in PHP's syntax, as well as be useful in certain
situations.
On Thursday, 19 July 2012 at 7:49 PM, Paul Dragoonis wrote:
>
> -1 from me, sorry Hoa.
>
> On Thu, Jul 19, 2012 at 10:44 AM, Ivan Enderlin @ Hoa
> <ivan.ender...@hoa-project.net (mailto:ivan.ender...@hoa-project.net)> wrote:
> > Hi internals,
> >
> > As you certainly know, brackets defining blocks in PHP are optional if
> > blocks contain a single instruction. Thus:
> >
> > if($condition) {
> > echo 'foobar';
> > }
> >
> > is strictly equivalent to:
> >
> > if($condition)
> > echo 'foobar';
> >
> > But this syntactic sugar is not applied uniformly to all PHP language
> > constructions. I have the try/catch couple in mind.
> > First, I would like to know why it is not possible to write:
> >
> > try
> > throw new Exception('foobar');
> > catch(Exception $e)
> > var_dump($e->getMessage());
> >
> > as a strict equivalence of:
> >
> > try {
> > throw new Exception('foobar');
> > }
> > catch(Exception $e) {
> > var_dump($e->getMessage());
> > }
> >
> > Second, if it is possible, could we plan to have this “feature” (uniformity
> > actually) in PHP6 (or maybe before)?
> >
> > Best regards.
> >
> > --
> > Ivan Enderlin
> > Developer of Hoa
> > http://hoa.42/ or http://hoa-project.net/
> >
> > PhD. student at DISC/Femto-ST (Vesontio) and INRIA (Cassis)
> > http://disc.univ-fcomte.fr/ and http://www.inria.fr/
> >
> > Member of HTML and WebApps Working Group of W3C
> > http://w3.org/
> >
> >
> >
> > --
> > PHP Internals - PHP Runtime Development Mailing List
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
>
>
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