code: def p_function_nowidth(self, p):
          'function : FUNCTION ID SEMICOLON function_statement ENDFUNCTION'
          p[0] = Function(p[2],
                          Width(IntConst('0', lineno=p.lineno(1)),
                                IntConst('0', lineno=p.lineno(1)),
                                lineno=p.lineno(1)),
                          p[4], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_function_nowidth(self, p):
          'function : FUNCTION ID SEMICOLON function_statement ENDFUNCTION'
          p[0] = Function(p[2],
                          Width(IntConst('0', lineno=p.lineno(1)),
                                IntConst('0', lineno=p.lineno(1)),
                                lineno=p.lineno(1)),
                          p[4], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: function : FUNCTION ID SEMICOLON function_statement ENDFUNCTION