Re: RFC: mark functions as const for possible optimizations

From: Date: Sat, 15 Sep 2007 11:45:12 +0000
Subject: Re: RFC: mark functions as const for possible optimizations
References: 1  Groups: php.internals 
Request: Send a blank email to internals+get-32329@lists.php.net to get a copy of this message 
On Fri, 14 Sep 2007 18:01:13 +0100, in php.internals nlopess@php.net
("Nuno Lopes") wrote:

>My proposal is the following:
>some functions when fed with constant arguments always return a constant 
>value, too. e.g.:
>strlen('abcd') === 4.

I like the general idea.

Would there be some caveats with stuff like this if it is possible to
change the charset at runtime?

I guess it is important to be aware of whether a function is affected
by different settings (and if these settings can be changed at
runtime) to conclude if a function really is deterministic at this
level.

-- 
- Peter Brodersen

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