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Package php-typed-doctrine-collections
Short Description Typed Doctrine collections (Pseudo-arrays with type constraint)
License MIT
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Informations about the package php-typed-doctrine-collections
Typed Doctrine Collections
Type hinting is evolving but PHP 7 still does not currently provide a way to define the type of the elements of an array (a.k.a. Generics.)
This library is built on top of Doctrine/Collections to enforce type checking on elements added to a collection. We could also call them strongly typed arrays.
The aim is to leverage type hinting to help prevent bugs, or, at the very least, detect them earlier in the development cycle.
For the purpose of this library, the term type is used loosely to refer to built-in PHP types, classes, and even application-domain types.
Installation
In the examples below, the require 'vendor/autoload.php'; is implied.
Type Defined by Initial Value
The first element passed to the constructor determines the criteria for the elements that come after it.
Type Defined by a Sample Value
The element validation is done against the type of a sample value.
Type Defined by a Closure
The elements added to the collection can be checked with a closure:
Type Defined by a Class Name
Objects added to the collection can be checked against a class name:
Built-In Library Types
Apart from a closure or a class name, the setElementType() method also
accepts the following values:
arraybooleancallabledoubleintegernumberjsonobjectresourcestring
Built-In Collections
Several typed collections are predefined:
\Abacus11\Doctrine\Collections\Arrays\Abacus11\Doctrine\Collections\Booleans\Abacus11\Doctrine\Collections\Callables\Abacus11\Doctrine\Collections\Doubles\Abacus11\Doctrine\Collections\Integers\Abacus11\Doctrine\Collections\Numbers\Abacus11\Doctrine\Collections\JSONs\Abacus11\Doctrine\Collections\Objects\Abacus11\Doctrine\Collections\Resources\Abacus11\Doctrine\Collections\Strings
Custom Type Collections
You can easily create collections by extending the base class or by including the trait into your own implementation of the ArrayAccess interface.
Remarks:
- We could have type hinted the
enter()method with theCarclass instead of theVehicleclass. This would also have thrown a \TypeError exception. - I am aware that I mixed the types in the docBlock and the signature of
the
getCars()method. It is somewhat more legible and may help your IDE. However, the benefit may vary depending on your editor / IDE, and it may lead to confusion if trying to use some array function that expect a nativearraytype.
