code: def p_function(self, p):
          'function : FUNCTION width ID SEMICOLON function_statement ENDFUNCTION'
          p[0] = Function(p[3], p[2], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_function(self, p):
          'function : FUNCTION width ID SEMICOLON function_statement ENDFUNCTION'
          p[0] = Function(p[3], p[2], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: function : FUNCTION width ID SEMICOLON function_statement ENDFUNCTION