Clear key after matching on it

src/commit_request.hpp

@@ -89,7 +89,7 @@ public:
     ArenaString current_string;
     ArenaString current_number;
     bool in_key = false;
-    bool parse_error = false;
+    const char *parse_error = nullptr;
     bool parse_complete = false;
 
     // Current objects being parsed
@@ -222,7 +222,15 @@ public:
    * @brief Check if there was a parse error.
    * @return true if there was a parse error
    */
-  bool has_parse_error() const { return parser_context_.parse_error; }
+  bool has_parse_error() const {
+    return parser_context_.parse_error != nullptr;
+  }
+
+  /**
+   * @brief Get the parse error message if there was an error.
+   * @return Error message string, or nullptr if no error
+   */
+  const char *get_parse_error() const { return parser_context_.parse_error; }
 
   /**
    * @brief Get the request ID if present.