explicit operator bool() const noexcept override;
/** Get the schema.
- * @returns A pointer to the schema, or <tt>0</tt>.
+ * @returns A pointer to the schema, or <tt>nullptr</tt>.
*/
RelaxNGSchema* get_schema();
/** Get the schema.
- * @returns A pointer to the schema, or <tt>0</tt>.
+ * @returns A pointer to the schema, or <tt>nullptr</tt>.
*/
const RelaxNGSchema* get_schema() const;