Squiz/FunctionCommentThrowTag: fix sniff to work with the PHP 8 identifier tokens

Includes adding some extra tests to ensure all identifier name types are covered.

Author: jrfnl

src/Standards/Squiz/Sniffs/Commenting/FunctionCommentThrowTagSniff.php

@@ -106,44 +106,30 @@ public function process(File $phpcsFile, $stackPtr)
 
             $nextToken = $phpcsFile->findNext(Tokens::$emptyTokens, ($currPos + 1), null, true);
             if ($tokens[$nextToken]['code'] === T_NEW
-                || $tokens[$nextToken]['code'] === T_NS_SEPARATOR
-                || $tokens[$nextToken]['code'] === T_STRING
+                || isset(Tokens::$nameTokens[$tokens[$nextToken]['code']]) === true
             ) {
                 if ($tokens[$nextToken]['code'] === T_NEW) {
                     $currException = $phpcsFile->findNext(
-                        [
-                            T_NS_SEPARATOR,
-                            T_STRING,
-                        ],
-                        $currPos,
+                        Tokens::$emptyTokens,
+                        ($nextToken + 1),
                         $stackPtrEnd,
-                        false,
-                        null,
                         true
                     );
                 } else {
                     $currException = $nextToken;
                 }
 
-                if ($currException !== false) {
-                    $endException = $phpcsFile->findNext(
-                        [
-                            T_NS_SEPARATOR,
-                            T_STRING,
-                        ],
-                        ($currException + 1),
-                        $stackPtrEnd,
-                        true,
-                        null,
-                        true
-                    );
-
-                    if ($endException === false) {
-                        $thrownExceptions[] = $tokens[$currException]['content'];
+                if ($currException !== false
+                    && isset(Tokens::$nameTokens[$tokens[$currException]['code']]) === true
+                ) {
+                    if ($tokens[$currException]['code'] === T_NAME_RELATIVE) {
+                        // Strip the `namespace\` prefix off the exception name
+                        // to prevent confusing the name comparison.
+                        $thrownExceptions[] = substr($tokens[$currException]['content'], 10);
                     } else {
-                        $thrownExceptions[] = $phpcsFile->getTokensAsString($currException, ($endException - $currException));
+                        $thrownExceptions[] = $tokens[$currException]['content'];
                     }
-                }//end if
+                }
             } else if ($tokens[$nextToken]['code'] === T_VARIABLE) {
                 // Find the nearest catch block in this scope and, if the caught var
                 // matches our re-thrown var, use the exception types being caught as

src/Standards/Squiz/Tests/Commenting/FunctionCommentThrowTagUnitTest.inc

@@ -281,7 +281,7 @@ class NamespacedException {
     public function fooBar2() {
         throw new \Foo\Bar\FooBarException();
     }
-    
+
     /**
      * @throws FooBarException
      */
@@ -531,3 +531,21 @@ $anon = new class {
 public function ImproveCommentTolerance() {
     throw /*comment*/ new /*comment*/ Right_Exception('Error');
 }
+
+namespace Namespaced\Names {
+    class NamespacedNames {
+        /**
+         * @throws Namespaced\Names\Exception
+         */
+        public function foo() {
+            throw new namespace\Exception();
+        }
+
+        /**
+         * @throws Namespaced\Names\Bar\FooBarException
+         */
+        public function fooBar2() {
+            throw new Bar\FooBarException();
+        }
+    }
+}