+ * Method invoked for each leaf of the variable
+ *
+ * \param type Type of the field.
+ * \param name Fully qualified name of the field.
+ * \param row_major For a matrix type, is it stored row-major.
+ * \param record_type Type of the record containing the field.
+ * \param last_field Set if \c name is the last field of the structure
+ * containing it. This will always be false for items
+ * not contained in a structure or interface block.
+ *
+ * The default implementation just calls the other \c visit_field method.
+ */
+ virtual void visit_field(const glsl_type *type, const char *name,
+ bool row_major, const glsl_type *record_type,
+ bool last_field);
+
+ /**
+ * Method invoked for each leaf of the variable