On Fri, 3 Jan 2020 at 14:39, tyson andre <[email protected]> wrote:
> > namespace Foo;
> > echo strlen('hello'); // Finds a global function at step 2, so doesn't
> > trigger the autoloader
> > echo \Foo\strlen('hello'); // Explicitly namespaced function, so triggers
> > the autoloader
> > echo strlen('hello'); // Should this run \strlen or Foo\strlen?
>
> The example you were thinking of would call \strlen on line 2, \Foo\strlen
> on line 3, and \Foo\strlen on line 4.
> (because the caching is per-opcode, not per-file or per-namespace)
>
Sorry, I should have been clearer - I wasn't asking for a literal answer
based on any particular implementation, I was asking rhetorically what a
user would expect to happen.
Let's make the example a tiny bit more complex:
namespace Foo;
function one() {
echo strlen('hello');
}
function two() {
echo Foo\strlen('hello again');
}
Now the behaviour of my program can completely change depending on which of
those functions I call first, which might even depend on user input.
Regardless of exactly how the cache works, that kind of unpredictability is
a recipe for disaster.
The only way to make it predictable again is to pre-define the namespaced
function in my startup code, at which point I don't need function
autoloading.
Regards,
--
Rowan Tommins
[IMSoP]
