deferred class ROUT_BODY_AS inherit AST_EIFFEL feature -- Conveniences is_once: BOOLEAN is -- Is the routine body a once one ? do -- Do nothing end; is_deferred: BOOLEAN is -- Is the routine body a deferred one ? do -- Do nothing end; is_external: BOOLEAN is -- Is the routine body an external one ? do -- Do nothing end; has_instruction (i: INSTRUCTION_AS): BOOLEAN is -- Has current routine body instruction `i'? do -- Do nothing end; index_of_instruction (i: INSTRUCTION_AS): INTEGER is -- Index of `i'. do -- Do nothing end; end