Support generics

[thekid]

Example

// Declaration
class Vector<T> {
  public function add(T $t): self { ... }
  public function get(int $i): T { ... }
}

// Instantiation
$vector= new Vector<string>();

See also

xp-framework/rfc#106
xp-framework/rfc#193
https://wiki.php.net/rfc/generics
https://docs.hhvm.com/hack/generics/introduction

[thekid]

Real-life example:

diff --git a/src/main/php/de/thekid/dialog/color/PriorityQueue.php b/src/main/php/de/thekid/dialog/color/PriorityQueue.php
index a683a76..6fcb295 100755
--- a/src/main/php/de/thekid/dialog/color/PriorityQueue.php
+++ b/src/main/php/de/thekid/dialog/color/PriorityQueue.php
@@ -1,12 +1,12 @@
 <?php namespace de\thekid\dialog\color;
 
 /** @test de.thekid.dialog.unittest.PriorityQueueTest */
-class PriorityQueue {
+class PriorityQueue<T> {
   private $elements= [];
   private $sorted= true;
   private $comparator= null;
 
-  public function comparing(function(mixed, mixed): int $comparator): self {
+  public function comparing(function(T, T): int $comparator): self {
     $this->comparator= $comparator;
     return $this;
   }
@@ -17,13 +17,13 @@ class PriorityQueue {
   }
 
   /** Pushes an element */
-  public function push($element): void {
+  public function push(T $element): void {
     $this->elements[]= $element;
     $this->sorted= false;
   }
 
   /** Pops an element */
-  public function pop() {
+  public function pop(): ?T {
     if (!$this->sorted) {
       $this->comparator ? usort($this->elements, $this->comparator) : sort($this->elements);
       $this->sorted= true;

Maybe as an addition xp-lang/xp-generics package?

[thekid]

Maybe as an addition xp-lang/xp-generics package?

Yes 😄 -> https://github.com/xp-lang/xp-generics/releases/tag/v0.4.0