[Transform] Deprecate ConstFetchToClassConstFetchRector as niche and never used

rules/Transform/Rector/ConstFetch/ConstFetchToClassConstFetchRector.php

@@ -7,23 +7,19 @@
 use PhpParser\Node;
 use PhpParser\Node\Expr\ClassConstFetch;
 use PhpParser\Node\Expr\ConstFetch;
+use Rector\Configuration\Deprecation\Contract\DeprecatedInterface;
 use Rector\Contract\Rector\ConfigurableRectorInterface;
+use Rector\Exception\ShouldNotHappenException;
 use Rector\Rector\AbstractRector;
 use Rector\RuleDoc\CodeSample\ConfiguredCodeSample;
 use Rector\RuleDoc\RuleDefinition;
 use Rector\Transform\ValueObject\ConstFetchToClassConstFetch;
-use Webmozart\Assert\Assert;
 
 /**
- * @see Rector\Tests\Transform\Rector\ConstFetch\ConstFetchToClassConstFetchRector\ConstFetchToClassConstFetchTest
+ * @deprecated This rule is deprecated, as too niche and never used. A global const name can be reused across unrelated contexts and does not map cleanly to a single class constant. Use a custom rule scoped to your exact case instead.
  */
-final class ConstFetchToClassConstFetchRector extends AbstractRector implements ConfigurableRectorInterface
+final class ConstFetchToClassConstFetchRector extends AbstractRector implements ConfigurableRectorInterface, DeprecatedInterface
 {
-    /**
-     * @var array<string, ConstFetchToClassConstFetch[]>
-     */
-    private array $constFetchToClassConstsByOldName = [];
-
     public function getRuleDefinition(): RuleDefinition
     {
         return new RuleDefinition('Change const fetch to class const fetch', [
@@ -43,28 +39,16 @@ public function getNodeTypes(): array
      */
     public function refactor(Node $node): ?ClassConstFetch
     {
-        $constName = $this->getName($node);
-        if ($constName === null) {
-            return null;
-        }
-
-        foreach ($this->constFetchToClassConstsByOldName[strtolower($constName)] ?? [] as $constFetchToClassConst) {
-            return $this->nodeFactory->createClassConstFetch(
-                $constFetchToClassConst->getNewClassName(),
-                $constFetchToClassConst->getNewConstName()
-            );
-        }
-
-        return null;
+        throw new ShouldNotHappenException(sprintf(
+            '"%s" rule is deprecated, as too niche and never used; use a custom rule scoped to your exact case instead',
+            self::class
+        ));
     }
 
+    /**
+     * @param mixed[] $configuration
+     */
     public function configure(array $configuration): void
     {
-        Assert::allIsAOf($configuration, ConstFetchToClassConstFetch::class);
-
-        $this->constFetchToClassConstsByOldName = [];
-        foreach ($configuration as $constFetchToClassConst) {
-            $this->constFetchToClassConstsByOldName[strtolower($constFetchToClassConst->getOldConstName())][] = $constFetchToClassConst;
-        }
     }
 }

rules/Transform/ValueObject/ConstFetchToClassConstFetch.php

@@ -6,6 +6,9 @@
 
 use Rector\Validation\RectorAssert;
 
+/**
+ * @api kept for deprecated ConstFetchToClassConstFetchRector code sample
+ */
 final readonly class ConstFetchToClassConstFetch
 {
     public function __construct(