This pattern improves over the current usage of singleton by allowing type inference.
This also better supports refactor, code usage detection, and auto-completion of classes.
Previously, generated cache results that returned 0, '', array() etc
were being ignored. This change narrows it down to just false.
Ideally we would use a EmptyCacheHit object to be very specific for
these cases, but perhaps this approach is a bit overkill.
When a method was not found on UnsavedRelationList I was getting the following error:
Object->__call(): the method 'nameOfMethod' does not exist on ''
(nameOfMethod has been replaced here since it was a method I added via an extension)
This reverts commit 14b997eea3.
Its just not practical to use the Config API as it stands,
the add_extension() wrapper does more than just a Config->update().
Most use cases can be covered via YML, but any conditional
additions (e.g. in unit tests) can still benefit from the
add_extensions() shorthand.
* Due to missing break, the T_STRING case would fall through to array.
* The values were being added to the wrong variable.
* Added missing support for missing null values.
The deprecations are supposed to denote the release where
the functionality will be removed, as opposed to the one where
its deprecated. Having 3.1 as a target for recent changes
in popular methods like Object::add_extension() causes
too many short-term hassles, there's no "grace period".
The entire framework repo (with the exception of system-generated files) has been amended to respect the 120c line-length limit. This is in preparation for the enforcement of this rule with PHP_CodeSniffer.
Config system used to provide an add_static_source method, which was intended for
use by Extensions to add statics. But extensions for a class arent initialised
until at least one instance of that class is created, so before that the
Config system didnt include values from extensions
This patch reverses the control flow, so that the Config system explictly asks
each Object for its additional config sources via the new method
get_extra_config_sources. This method returns an array that can contain
string names of classes and also raw associative arrays.
The developer visible change is that Extension#add_to_class has been
deprecated. Instead there is a new method, get_extra_config, which has
the same method signature but needs to guarantee that it doesnt
cause side effects. Additionally there is no need to call
parent::get_extra_config - this is handled automatically.
BUGFIX Versioned's constructor doesn't provide suitable defaults. Previously a bug/feature in singleton, where it would pass null,true as params to strong_create, which would then get passed through as params to Versioned's constructor, meant that the code still executed fine (as was set to something that wasn't an array, so the null and true were instead taken as args). The fact that the usage of singleton(Versioned) never really used the classes code, purely for value lookup, meant that this never propagated errors. I've now switched singleton() to use the injector for retrieving values, which means these dud values are no longer passed through
CHANGE Given that Config::inst is an implementation of the singleton pattern itself, I've removed the extra call to singleton(). A side effect of this is that it gets around a possibly nasty circular reference with the dependency injector (which relies on the config object); in future, this dependency structure should really be structured from the DI directly.
MINOR Change singleton and strong_create to use dependency injector
