PSR2/ClassDeclaration: bug fix - prevent fixer conflict

src/Standards/PSR2/Sniffs/Classes/ClassDeclarationSniff.php

@@ -349,7 +349,10 @@ public function processOpen(File $phpcsFile, $stackPtr)
                         $phpcsFile->fixer->addNewline($prev);
                         $phpcsFile->fixer->endChangeset();
                     }
-                } else if ($tokens[$prev]['line'] !== ($tokens[$className]['line'] - 1)) {
+                } else if ((isset(Tokens::$commentTokens[$tokens[$prev]['code']]) === false
+                    && $tokens[$prev]['line'] !== ($tokens[$className]['line'] - 1))
+                    || $tokens[$prev]['line'] === $tokens[$className]['line']
+                ) {
                     if ($keywordTokenType === T_EXTENDS) {
                         $error = 'Only one interface may be specified per line in a multi-line extends declaration';
                         $fix   = $phpcsFile->addFixableError($error, $className, 'ExtendsInterfaceSameLine');

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.inc

@@ -293,3 +293,26 @@ class BarFoo implements
     namespace\BarFoo
 {
 }
+
+// Safeguard that the sniff ignores comments between interface names in a multiline implements.
+class ClassWithMultiLineImplementsAndIgnoreAnnotation implements
+    SomeInterface,
+    // phpcs:disable Stnd.Cat.Sniff -- For reasons.
+
+    \AnotherInterface
+{
+}
+
+class ClassWithMultiLineImplementsAndComment implements
+    SomeInterface,
+    // Comment.
+
+AnotherInterface
+{
+}
+
+class ClassWithMultiLineImplementsAndCommentOnSameLineAsInterfaceName implements
+    SomeInterface,
+    /* Comment. */ AnotherInterface
+{
+}

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.inc.fixed

@@ -281,3 +281,27 @@ class BarFoo implements
     namespace\BarFoo
 {
 }
+
+// Safeguard that the sniff ignores comments between interface names in a multiline implements.
+class ClassWithMultiLineImplementsAndIgnoreAnnotation implements
+    SomeInterface,
+    // phpcs:disable Stnd.Cat.Sniff -- For reasons.
+
+    \AnotherInterface
+{
+}
+
+class ClassWithMultiLineImplementsAndComment implements
+    SomeInterface,
+    // Comment.
+
+    AnotherInterface
+{
+}
+
+class ClassWithMultiLineImplementsAndCommentOnSameLineAsInterfaceName implements
+    SomeInterface,
+    /* Comment. */
+    AnotherInterface
+{
+}

src/Standards/PSR2/Tests/Classes/ClassDeclarationUnitTest.php

@@ -76,6 +76,8 @@ public function getErrorList()
             273 => 1,
             276 => 1,
             282 => 1,
+            310 => 1,
+            316 => 1,
         ];
 
     }//end getErrorList()