Fix For ENBF

Author: Dinesh0204

src/Query/Parser.php

@@ -2468,13 +2468,21 @@ public function ConditionalPrimary(): AST\ConditionalPrimary
         return $condPrimary;
     }
 
-    /**
-     * SimpleConditionalExpression ::=
-     *      ComparisonExpression | BetweenExpression | LikeExpression |
-     *      InExpression | NullComparisonExpression | ExistsExpression |
-     *      EmptyCollectionComparisonExpression | CollectionMemberExpression |
-     *      InstanceOfExpression
-     */
+/**
+ * SimpleConditionalExpression ::=
+ *      ComparisonExpression | BetweenExpression | LikeExpression |
+ *      InExpression | NullComparisonExpression | ExistsExpression |
+ *      EmptyCollectionComparisonExpression | CollectionMemberExpression |
+ *      InstanceOfExpression
+ *
+ * InExpression ::= ArithmeticExpression ["NOT"] "IN" "(" (InParameter {"," InParameter}* | Subselect) ")"
+ *
+ * Note: ArithmeticExpression includes CaseExpression (CASE/COALESCE/NULLIF) and
+ * parenthesized expressions, allowing constructs like:
+ *   - CASE WHEN ... END IN (...)
+ *   - COALESCE(...) IN (...)
+ *   - (u.id + 1) IN (...)
+ */
     public function SimpleConditionalExpression(): AST\ExistsExpression|AST\BetweenExpression|AST\LikeExpression|AST\InListExpression|AST\InSubselectExpression|AST\InstanceOfExpression|AST\CollectionMemberExpression|AST\NullComparisonExpression|AST\EmptyCollectionComparisonExpression|AST\ComparisonExpression
     {
         assert($this->lexer->lookahead !== null);
@@ -2496,7 +2504,6 @@ public function SimpleConditionalExpression(): AST\ExistsExpression|AST\BetweenE
         // Handle conditional and null-handling expressions (CASE, COALESCE, NULLIF) by peeking ahead in the token stream
         if ($token->type === TokenType::T_CASE || $token->type === TokenType::T_COALESCE || $token->type === TokenType::T_NULLIF) {
             if ($token->type === TokenType::T_CASE) {
-
                 // For CASE expressions, peek beyond the matching END keyword
                 $nestingDepth = 1;