Add a FunctionLike interface to Methods, Functions and Closures.

The elements listed above share common elements like parameters, possible return types and bodies.

lib/PhpParser/Node/Expr/Closure.php

@@ -4,8 +4,9 @@ namespace PhpParser\Node\Expr;
 
 use PhpParser\Node;
 use PhpParser\Node\Expr;
+use PhpParser\Node\FunctionLike;
 
-class Closure extends Expr
+class Closure extends Expr implements FunctionLike
 {
     /** @var bool Whether the closure is static */
     public $static;
@@ -45,4 +46,20 @@ class Closure extends Expr
     public function getSubNodeNames() {
         return array('static', 'byRef', 'params', 'uses', 'returnType', 'stmts');
     }
+
+    public function returnsByRef() {
+        return $this->byRef;
+    }
+
+    public function getParams() {
+        return $this->params;
+    }
+
+    public function getReturnType() {
+        return $this->returnType;
+    }
+
+    public function getStmts() {
+        return $this->stmts;
+    }
 }

lib/PhpParser/Node/FunctionLike.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace PhpParser\Node;
+
+use PhpParser\Node;
+
+interface FunctionLike extends Node
+{
+    /**
+     * Whether to return by reference
+     *
+     * @return bool
+     */
+    public function returnsByRef();
+
+    /**
+     * List of parameters
+     *
+     * @return Node\Param[]
+     */
+    public function getParams();
+
+    /**
+     * Get the declared return type or null
+     * 
+     * @return null|string|Node\Name[]
+     */
+    public function getReturnType();
+
+    /**
+     * The function body
+     *
+     * @return Node\Stmt[]
+     */
+    public function getStmts();
+}

lib/PhpParser/Node/Stmt/ClassMethod.php

@@ -3,9 +3,10 @@
 namespace PhpParser\Node\Stmt;
 
 use PhpParser\Node;
+use PhpParser\Node\FunctionLike;
 use PhpParser\Error;
 
-class ClassMethod extends Node\Stmt
+class ClassMethod extends Node\Stmt implements FunctionLike
 {
     /** @var int Type */
     public $type;
@@ -57,6 +58,22 @@ class ClassMethod extends Node\Stmt
         return array('type', 'byRef', 'name', 'params', 'returnType', 'stmts');
     }
 
+    public function returnsByRef() {
+        return $this->byRef;
+    }
+
+    public function getParams() {
+        return $this->params;
+    }
+
+    public function getReturnType() {
+        return $this->returnType;
+    }
+
+    public function getStmts() {
+        return $this->stmts;
+    }
+
     public function isPublic() {
         return ($this->type & Class_::MODIFIER_PUBLIC) !== 0 || $this->type === 0;
     }

lib/PhpParser/Node/Stmt/Function_.php

@@ -3,8 +3,9 @@
 namespace PhpParser\Node\Stmt;
 
 use PhpParser\Node;
+use PhpParser\Node\FunctionLike;
 
-class Function_ extends Node\Stmt
+class Function_ extends Node\Stmt implements FunctionLike
 {
     /** @var bool Whether function returns by reference */
     public $byRef;
@@ -40,4 +41,20 @@ class Function_ extends Node\Stmt
     public function getSubNodeNames() {
         return array('byRef', 'name', 'params', 'returnType', 'stmts');
     }
+
+    public function returnsByRef() {
+        return $this->byRef;
+    }
+
+    public function getParams() {
+        return $this->params;
+    }
+
+    public function getReturnType() {
+        return $this->returnType;
+    }
+
+    public function getStmts() {
+        return $this->stmts;
+    }
 }