Add BuilderFactory->val() method

lib/PhpParser/BuilderFactory.php

@@ -117,6 +117,17 @@ class BuilderFactory
         return new Builder\Use_($name, Use_::TYPE_NORMAL);
     }
 
+    /**
+     * Creates node a for a literal value.
+     *
+     * @param Node\Expr|bool|null|int|float|string|array $value $value
+     *
+     * @return Node\Expr
+     */
+    public function val($value) {
+        return BuilderHelpers::normalizeValue($value);
+    }
+
     public function __call($name, array $args) {
         if (method_exists($this, '_' . $name)) {
             return $this->{'_' . $name}(...$args);

test/PhpParser/BuilderFactoryTest.php

@@ -3,6 +3,7 @@
 namespace PhpParser;
 
 use PhpParser\Node\Expr;
+use PhpParser\Node\Scalar\String_;
 
 class BuilderFactoryTest extends \PHPUnit_Framework_TestCase
 {
@@ -34,6 +35,16 @@ class BuilderFactoryTest extends \PHPUnit_Framework_TestCase
         $factory->foo();
     }
 
+    public function testVal() {
+        // This method is a wrapper around BuilderHelpers::normalizeValue(),
+        // which is already tested elsewhere
+        $factory = new BuilderFactory();
+        $this->assertEquals(
+            new String_("foo"),
+            $factory->val("foo")
+        );
+    }
+
     public function testIntegration() {
         $factory = new BuilderFactory;
         $node = $factory->namespace('Name\Space')