Initial support for trait usage, fixing #14

Author: thekid

src/main/php/lang/ast/Emitter.class.php

@@ -375,6 +375,10 @@ protected function emitTrait($node) {
     $this->out->write('}');
   }
 
+  protected function emitUse($node) {
+    $this->out->write('use '.$node->value.';');
+  }
+
   protected function emitConst($node) {
     $this->out->write(implode(' ', $node->value[1]).' const '.$node->value[0].'=');
     $this->emit($node->value[2]);

src/test/php/lang/ast/unittest/emit/Loading.class.php

@@ -0,0 +1,7 @@
+<?php namespace lang\ast\unittest\emit;
+
+trait Loading {
+
+  public function loaded() { }
+
+}

src/test/php/lang/ast/unittest/emit/TraitsTest.class.php

@@ -0,0 +1,23 @@
+<?php namespace lang\ast\unittest\emit;
+
+use lang\XPClass;
+
+/**
+ * Traits
+ *
+ * @see   https://wiki.php.net/rfc/horizontalreuse
+ */
+class TraitsTest extends EmittingTest {
+
+  #[@test]
+  public function trait_is_included() {
+    $t= $this->type('class <T> { use \lang\ast\unittest\emit\Loading; }');
+    $this->assertEquals([new XPClass(Loading::class)], $t->getTraits());
+  }
+
+  #[@test]
+  public function trait_method_is_part_of_type() {
+    $t= $this->type('class <T> { use \lang\ast\unittest\emit\Loading; }');
+    $this->assertTrue($t->hasMethod('loaded'));
+  }
+}