Merge branch '4.2' into 4.3

* 4.2:
  fix inline handling when dumping tagged values
  [Messenger] Flatten collection of stamps collected by the traceable middleware
  [PropertyAccess] Fix PropertyAccessorCollectionTest
  Typo in web profiler
  relax some date parser patterns
  Avoid getting right to left style

Author: nicolas-grekas

Dumper.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Yaml;
 
+use Symfony\Component\Yaml\Tag\TaggedValue;
+
 /**
  * Dumper dumps PHP variables to YAML strings.
  *
@@ -56,7 +58,7 @@ public function dump($input, int $inline = 0, int $indent = 0, int $flags = 0):
             $dumpObjectAsInlineMap = empty((array) $input);
         }
 
-        if ($inline <= 0 || (!\is_array($input) && $dumpObjectAsInlineMap) || empty($input)) {
+        if ($inline <= 0 || (!\is_array($input) && !$input instanceof TaggedValue && $dumpObjectAsInlineMap) || empty($input)) {
             $output .= $prefix.Inline::dump($input, $flags);
         } else {
             $dumpAsMap = Inline::isHash($input);
@@ -75,6 +77,19 @@ public function dump($input, int $inline = 0, int $indent = 0, int $flags = 0):
                     continue;
                 }
 
+                if ($value instanceof TaggedValue) {
+                    $output .= sprintf('%s%s !%s', $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', $value->getTag());
+
+                    if ($inline - 1 <= 0) {
+                        $output .= ' '.$this->dump($value->getValue(), $inline - 1, 0, $flags)."\n";
+                    } else {
+                        $output .= "\n";
+                        $output .= $this->dump($value->getValue(), $inline - 1, $dumpAsMap ? $indent + $this->indentation : $indent + 2, $flags);
+                    }
+
+                    continue;
+                }
+
                 $dumpObjectAsInlineMap = true;
 
                 if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \ArrayObject || $value instanceof \stdClass)) {

Tests/DumperTest.php

@@ -14,6 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Dumper;
 use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Tag\TaggedValue;
 use Symfony\Component\Yaml\Yaml;
 
 class DumperTest extends TestCase
@@ -368,6 +369,94 @@ public function testDumpingStdClassInstancesRespectsInlineLevel()
     inner2: c
     inner3: { deep1: d, deep2: e }
 
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingTaggedValueSequenceRespectsInlineLevel()
+    {
+        $data = [
+            new TaggedValue('user', [
+                'username' => 'jane',
+            ]),
+            new TaggedValue('user', [
+                'username' => 'john',
+            ]),
+        ];
+
+        $yaml = $this->dumper->dump($data, 2);
+
+        $expected = <<<YAML
+- !user
+  username: jane
+- !user
+  username: john
+
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingTaggedValueSequenceWithInlinedTagValues()
+    {
+        $data = [
+            new TaggedValue('user', [
+                'username' => 'jane',
+            ]),
+            new TaggedValue('user', [
+                'username' => 'john',
+            ]),
+        ];
+
+        $yaml = $this->dumper->dump($data, 1);
+
+        $expected = <<<YAML
+- !user { username: jane }
+- !user { username: john }
+
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingTaggedValueMapRespectsInlineLevel()
+    {
+        $data = [
+            'user1' => new TaggedValue('user', [
+                'username' => 'jane',
+            ]),
+            'user2' => new TaggedValue('user', [
+                'username' => 'john',
+            ]),
+        ];
+
+        $yaml = $this->dumper->dump($data, 2);
+
+        $expected = <<<YAML
+user1: !user
+    username: jane
+user2: !user
+    username: john
+
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingTaggedValueMapWithInlinedTagValues()
+    {
+        $data = [
+            'user1' => new TaggedValue('user', [
+                'username' => 'jane',
+            ]),
+            'user2' => new TaggedValue('user', [
+                'username' => 'john',
+            ]),
+        ];
+
+        $yaml = $this->dumper->dump($data, 1);
+
+        $expected = <<<YAML
+user1: !user { username: jane }
+user2: !user { username: john }
+
 YAML;
         $this->assertSame($expected, $yaml);
     }