From 8de2a226a8de220bacbe1981f972c560c37d4e29 Mon Sep 17 00:00:00 2001
From: Thomas Calvet <calvet.thomas@gmail.com>
Date: Sat, 23 Nov 2019 20:59:48 +0100
Subject: [PATCH] [Config][ReflectionClassResource] Handle parameters with
 undefined constant as their default values

---
 .../Resource/ReflectionClassResource.php      | 50 +++++++++++++++++--
 .../Resource/ReflectionClassResourceTest.php  | 18 +++++--
 2 files changed, 62 insertions(+), 6 deletions(-)

diff --git a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
index d5e6b829cfeca..4c8f89cd3f204 100644
--- a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
+++ b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
@@ -151,12 +151,56 @@ private function generateSignature(\ReflectionClass $class)
             }
         } else {
             foreach ($class->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $m) {
-                yield preg_replace('/^  @@.*/m', '', $m);
-
                 $defaults = [];
+                $parametersWithUndefinedConstants = [];
                 foreach ($m->getParameters() as $p) {
-                    $defaults[$p->name] = $p->isDefaultValueAvailable() ? $p->getDefaultValue() : null;
+                    if (!$p->isDefaultValueAvailable()) {
+                        $defaults[$p->name] = null;
+
+                        continue;
+                    }
+
+                    if (!$p->isDefaultValueConstant() || \defined($p->getDefaultValueConstantName())) {
+                        $defaults[$p->name] = $p->getDefaultValue();
+
+                        continue;
+                    }
+
+                    $defaults[$p->name] = $p->getDefaultValueConstantName();
+                    $parametersWithUndefinedConstants[$p->name] = true;
+                }
+
+                if (!$parametersWithUndefinedConstants) {
+                    yield preg_replace('/^  @@.*/m', '', $m);
+                } else {
+                    $stack = [
+                        $m->getDocComment(),
+                        $m->getName(),
+                        $m->isAbstract(),
+                        $m->isFinal(),
+                        $m->isStatic(),
+                        $m->isPublic(),
+                        $m->isPrivate(),
+                        $m->isProtected(),
+                        $m->returnsReference(),
+                        \PHP_VERSION_ID >= 70000 && $m->hasReturnType() ? (\PHP_VERSION_ID >= 70100 ? $m->getReturnType()->getName() : (string) $m->getReturnType()) : '',
+                    ];
+
+                    foreach ($m->getParameters() as $p) {
+                        if (!isset($parametersWithUndefinedConstants[$p->name])) {
+                            $stack[] = (string) $p;
+                        } else {
+                            $stack[] = $p->isOptional();
+                            $stack[] = \PHP_VERSION_ID >= 70000 && $p->hasType() ? (\PHP_VERSION_ID >= 70100 ? $p->getType()->getName() : (string) $p->getType()) : '';
+                            $stack[] = $p->isPassedByReference();
+                            $stack[] = \PHP_VERSION_ID >= 50600 ? $p->isVariadic() : '';
+                            $stack[] = $p->getName();
+                        }
+                    }
+
+                    yield implode(',', $stack);
                 }
+
                 yield print_r($defaults, true);
             }
         }
diff --git a/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
index 76cad1433bb20..74ed6b3edc2a9 100644
--- a/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
@@ -63,8 +63,12 @@ public function testIsFreshForDeletedResources()
     /**
      * @dataProvider provideHashedSignature
      */
-    public function testHashedSignature($changeExpected, $changedLine, $changedCode)
+    public function testHashedSignature($changeExpected, $changedLine, $changedCode, $setContext = null)
     {
+        if ($setContext) {
+            $setContext();
+        }
+
         $code = <<<'EOPHP'
 /* 0*/
 /* 1*/  class %s extends ErrorException
@@ -82,7 +86,9 @@ public function testHashedSignature($changeExpected, $changedLine, $changedCode)
 /*13*/      protected function prot($a = []) {}
 /*14*/
 /*15*/      private function priv() {}
-/*16*/  }
+/*16*/
+/*17*/      public function ccc($bar = A_CONSTANT_THAT_FOR_SURE_WILL_NEVER_BE_DEFINED_CCCCCC) {}
+/*18*/  }
 EOPHP;
 
         static $expectedSignature, $generateSignature;
@@ -97,7 +103,9 @@ public function testHashedSignature($changeExpected, $changedLine, $changedCode)
         }
 
         $code = explode("\n", $code);
-        $code[$changedLine] = $changedCode;
+        if (null !== $changedCode) {
+            $code[$changedLine] = $changedCode;
+        }
         eval(sprintf(implode("\n", $code), $class = 'Foo'.str_replace('.', '_', uniqid('', true))));
         $signature = implode("\n", iterator_to_array($generateSignature(new \ReflectionClass($class))));
 
@@ -145,6 +153,10 @@ public function provideHashedSignature()
             yield [0, 7, 'protected int $prot;'];
             yield [0, 9, 'private string $priv;'];
         }
+
+        yield [1, 17, 'public function ccc($bar = 187) {}'];
+        yield [1, 17, 'public function ccc($bar = ANOTHER_ONE_THAT_WILL_NEVER_BE_DEFINED_CCCCCCCCC) {}'];
+        yield [1, 17, null, static function () { \define('A_CONSTANT_THAT_FOR_SURE_WILL_NEVER_BE_DEFINED_CCCCCC', 'foo'); }];
     }
 
     public function testEventSubscriber()

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