From 6040e5f8599a4bc89f85d1b5e787f8b94dea2973 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gabriel=20Ostroluck=C3=BD?=
 <gabriel.ostrolucky@everlution.sk>
Date: Sun, 3 Dec 2017 23:07:31 +0100
Subject: [PATCH] [Routing] Parse PHP constants in YAML routing files

---
 src/Symfony/Component/Routing/Loader/YamlFileLoader.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
index a796dd14758f2..b3ed099f8149e 100644
--- a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
@@ -16,6 +16,7 @@
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Parser as YamlParser;
+use Symfony\Component\Yaml\Yaml;
 use Symfony\Component\Config\Loader\FileLoader;
 
 /**
@@ -58,7 +59,7 @@ public function load($file, $type = null)
         }
 
         try {
-            $parsedConfig = $this->yamlParser->parseFile($path);
+            $parsedConfig = $this->yamlParser->parseFile($path, Yaml::PARSE_CONSTANT);
         } catch (ParseException $e) {
             throw new \InvalidArgumentException(sprintf('The file "%s" does not contain valid YAML.', $path), 0, $e);
         }