PSR12/AnonClassDeclaration: prevent fixer creating parse error

This fix prevents the fixer from removing the opening brace when there is no whitespace between the last character of the name of an interface and the open brace.

With this fix in place, all other symptoms reported are also gone as they were a side-effect of the parse error being created.

Includes unit test.

Fixes 3790

Author: jrfnl

CHANGELOG.md

@@ -129,6 +129,8 @@ The file documents changes to the PHP_CodeSniffer project.
     - Thanks to Juliette Reinders Folmer (@jrfnl) for the patch
 - Fixed bug #3789 : Incorrect tokenization for ternary operator with match inside of it
     - Thanks to Juliette Reinders Folmer (@jrfnl) for the patch
+- Fixed bug #3790 : PSR12/AnonClassDeclaration: prevent fixer creating parse error when there was no space before the open brace
+    - Thanks to Juliette Reinders Folmer (@jrfnl) for the patch
 - Fixed bug #3797 : Tokenizer/PHP: more context sensitive keyword fixes
     - Thanks to Juliette Reinders Folmer (@jrfnl) for the patch
 - Fixed bug #3801 : File::getMethodParameters(): allow for readonly promoted properties without visibility

src/Standards/PSR12/Sniffs/Classes/AnonClassDeclarationSniff.php

@@ -97,7 +97,11 @@ public function process(File $phpcsFile, $stackPtr)
                 $first  = $phpcsFile->findFirstOnLine(T_WHITESPACE, $stackPtr, true);
                 $indent = str_repeat(' ', ($tokens[$first]['column'] - 1));
                 $phpcsFile->fixer->beginChangeset();
-                $phpcsFile->fixer->replaceToken(($prev + 1), '');
+
+                if ($tokens[($prev + 1)]['code'] === \T_WHITESPACE) {
+                    $phpcsFile->fixer->replaceToken(($prev + 1), '');
+                }
+
                 $phpcsFile->fixer->addNewline($prev);
                 $phpcsFile->fixer->addContentBefore($opener, $indent);
                 $phpcsFile->fixer->endChangeset();

src/Standards/PSR12/Tests/Classes/AnonClassDeclarationUnitTest.inc

@@ -82,3 +82,9 @@ $foo->bar(
 
 foo(new class {
 });
+
+// Issue #3790: OpenBraceSameLine fixer should not remove open brace.
+$instance = new class() extends SomeClass implements
+    SomeInterface{
+    public function __construct() {}
+};

src/Standards/PSR12/Tests/Classes/AnonClassDeclarationUnitTest.inc.fixed

@@ -84,3 +84,10 @@ $foo->bar(
 
 foo(new class {
 });
+
+// Issue #3790: OpenBraceSameLine fixer should not remove open brace.
+$instance = new class () extends SomeClass implements
+    SomeInterface
+{
+    public function __construct() {}
+};

src/Standards/PSR12/Tests/Classes/AnonClassDeclarationUnitTest.php

@@ -48,6 +48,8 @@ public function getErrorList()
             56 => 2,
             63 => 1,
             75 => 1,
+            87 => 1,
+            88 => 1,
         ];
 
     }//end getErrorList()