if (yyn == YYPACT_NINF)    goto yydefault;  /* Not known => get a lookahead token if don't already have one.  */  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */  if (yychar == YYEMPTY)    {      YYDPRINTF ((stderr, "Reading a token: "));      yychar = YYLEX;    }  if (yychar <= YYEOF)    {      yychar = yytoken = YYEOF;      YYDPRINTF ((stderr, "Now at end of input.\n"));    }  else    {      yytoken = YYTRANSLATE (yychar);      YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);    }  /* If the proper action on seeing token YYTOKEN is to reduce or to     detect an error, take that action.  */  yyn += yytoken;  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)    goto yydefault;  yyn = yytable[yyn];  if (yyn <= 0)    {      if (yyn == 0 || yyn == YYTABLE_NINF)	goto yyerrlab;      yyn = -yyn;      goto yyreduce;    }  if (yyn == YYFINAL)    YYACCEPT;  /* Shift the lookahead token.  */  YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));  /* Discard the token being shifted unless it is eof.  */  if (yychar != YYEOF)    yychar = YYEMPTY;  *++yyvsp = yylval;  /* Count tokens shifted since error; after three, turn off error     status.  */  if (yyerrstatus)    yyerrstatus--;  yystate = yyn;  goto yynewstate;/*-----------------------------------------------------------.| yydefault -- do the default action for the current state.  |`-----------------------------------------------------------*/yydefault:  yyn = yydefact[yystate];  if (yyn == 0)    goto yyerrlab;  goto yyreduce;/*-----------------------------.| yyreduce -- Do a reduction.  |`-----------------------------*/yyreduce:  /* yyn is the number of a rule to reduce with.  */  yylen = yyr2[yyn];  /* If YYLEN is nonzero, implement the default value of the action:     `$$ = $1'.     Otherwise, the following line sets YYVAL to garbage.     This behavior is undocumented and Bison     users should not rely upon it.  Assigning to YYVAL     unconditionally makes the parser a bit smaller, and it avoids a     GCC warning that YYVAL may be used uninitialized.  */  yyval = yyvsp[1-yylen];  YY_REDUCE_PRINT (yyn);  switch (yyn)    {        case 2:#line 72 "parse_isa.y"    {				isa_parser_result = new isa_prog(yyvsp[-2].fenv_t, yyvsp[-1].venv_t, yyvsp[0].oper_list_t);			}    break;  case 3:#line 77 "parse_isa.y"    {				yyval.fenv_t = yyvsp[-1].fenv_t;			}    break;  case 4:#line 82 "parse_isa.y"    {				yyval.fenv_t = new FIELD_ENV;				yyval.fenv_t->insert(FIELD_T(yyvsp[-3].sym_t, yyvsp[-1].uint));			}    break;  case 5:#line 86 "parse_isa.y"    {				yyval.fenv_t = yyvsp[-4].fenv_t;				if (yyval.fenv_t->find(yyvsp[-3].sym_t)!=yyval.fenv_t->end()) {					warn("Ignoring redeclaration of field ", yyvsp[-3].sym_t);				}				else {					yyval.fenv_t->insert(FIELD_T(yyvsp[-3].sym_t, yyvsp[-1].uint));				}			}    break;  case 6:#line 97 "parse_isa.y"    {				yyval.venv_t = yyvsp[-1].venv_t;			}    break;  case 7:#line 100 "parse_isa.y"    {				yyval.venv_t = new VAR_ENV;			}    break;  case 8:#line 105 "parse_isa.y"    {				yyval.venv_t = new VAR_ENV;				yyval.venv_t->insert(VAR_T(yyvsp[-3].sym_t, yyvsp[-1].sym_t));			}    break;  case 9:#line 109 "parse_isa.y"    {				yyval.venv_t = yyvsp[-4].venv_t;				if (yyval.venv_t->find(yyvsp[-3].sym_t)!=yyval.venv_t->end()) {					warn("Ignoring redeclaration of variable ", yyvsp[-3].sym_t);				}				else {					yyval.venv_t->insert(VAR_T(yyvsp[-3].sym_t, yyvsp[-1].sym_t));				}			}    break;  case 10:#line 120 "parse_isa.y"    {				yyval.oper_list_t = new vector<oper_base *>;				yyval.oper_list_t->push_back(yyvsp[0].oper_t);			}    break;  case 11:#line 124 "parse_isa.y"    {				yyval.oper_list_t = yyvsp[-1].oper_list_t;				yyval.oper_list_t->push_back(yyvsp[0].oper_t);			}    break;  case 12:#line 130 "parse_isa.y"    {				yyval.oper_t = new oper(yyvsp[-6].sym_t, yyvsp[-4].code_list_t, yyvsp[-1].op_con_env_t);			}    break;  case 13:#line 133 "parse_isa.y"    {				yyval.oper_t = new group(yyvsp[-3].sym_t, yyvsp[-1].oper_list_t);			}    break;  case 14:#line 139 "parse_isa.y"    {				yyval.code_list_t = new vector<bin_code *>;				yyval.code_list_t->push_back(new bin_literal(yyvsp[0].strval));				free(yyvsp[0].strval);			}    break;  case 15:#line 144 "parse_isa.y"    {				yyval.code_list_t = new vector<bin_code *>;				yyval.code_list_t->push_back(new bin_ident(yyvsp[0].sym_t));			}    break;  case 16:#line 148 "parse_isa.y"    {				yyval.code_list_t = yyvsp[-2].code_list_t;				yyval.code_list_t->push_back(new bin_literal(yyvsp[0].strval));				free(yyvsp[0].strval);			}    break;  case 17:#line 153 "parse_isa.y"    {				yyval.code_list_t = yyvsp[-2].code_list_t;				yyval.code_list_t->push_back(new bin_ident(yyvsp[0].sym_t));			}    break;  case 18:#line 159 "parse_isa.y"    {				yyval.op_con_env_t = new OP_CON_ENV;					yyval.op_con_env_t->insert(*(yyvsp[0].op_con_t));				delete yyvsp[0].op_con_t;			}    break;  case 19:#line 164 "parse_isa.y"    {				yyval.op_con_env_t = yyvsp[-1].op_con_env_t;				if (yyval.op_con_env_t->find(yyvsp[0].op_con_t->first)!=yyval.op_con_env_t->end()) {					warn("Ignoring redeclaration of ", yyvsp[0].op_con_t->first);				}				else {					yyval.op_con_env_t->insert(*(yyvsp[0].op_con_t));				}				delete yyvsp[0].op_con_t;			}    break;  case 20:#line 176 "parse_isa.y"    {				yyval.op_con_t = new OP_CON_T(yyvsp[-2].sym_t, yyvsp[0].strval); 			}    break;    }/* Line 1000 of yacc.c.  */#line 1242 "parse_isa.cpp"  yyvsp -= yylen;  yyssp -= yylen;  YY_STACK_PRINT (yyss, yyssp);  *++yyvsp = yyval;  /* Now `shift' the result of the reduction.  Determine what state     that goes to, based on the state we popped back to and the rule     number reduced by.  */  yyn = yyr1[yyn];  yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;  if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)    yystate = yytable[yystate];  else    yystate = yydefgoto[yyn - YYNTOKENS];  goto yynewstate;/*------------------------------------.| yyerrlab -- here on detecting error |`------------------------------------*/yyerrlab:  /* If not already recovering from an error, report this error.  */  if (!yyerrstatus)    {      ++yynerrs;#if YYERROR_VERBOSE      yyn = yypact[yystate];      if (YYPACT_NINF < yyn && yyn < YYLAST)	{	  YYSIZE_T yysize = 0;	  int yytype = YYTRANSLATE (yychar);	  const char* yyprefix;	  char *yymsg;	  int yyx;	  /* Start YYX at -YYN if negative to avoid negative indexes in	     YYCHECK.  */	  int yyxbegin = yyn < 0 ? -yyn : 0;	  /* Stay within bounds of both yycheck and yytname.  */	  int yychecklim = YYLAST - yyn;	  int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;	  int yycount = 0;	  yyprefix = ", expecting ";	  for (yyx = yyxbegin; yyx < yyxend; ++yyx)	    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)	      {		yysize += yystrlen (yyprefix) + yystrlen (yytname [yyx]);		yycount += 1;		if (yycount == 5)		  {		    yysize = 0;		    break;		  }	      }	  yysize += (sizeof ("syntax error, unexpected ")		     + yystrlen (yytname[yytype]));	  yymsg = (char *) YYSTACK_ALLOC (yysize);	  if (yymsg != 0)	    {	      char *yyp = yystpcpy (yymsg, "syntax error, unexpected ");	      yyp = yystpcpy (yyp, yytname[yytype]);	      if (yycount < 5)		{		  yyprefix = ", expecting ";		  for (yyx = yyxbegin; yyx < yyxend; ++yyx)		    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)		      {			yyp = yystpcpy (yyp, yyprefix);			yyp = yystpcpy (yyp, yytname[yyx]);			yyprefix = " or ";		      }		}	      yyerror (yymsg);	      YYSTACK_FREE (yymsg);	    }	  else	    yyerror ("syntax error; also virtual memory exhausted");	}      else#endif /* YYERROR_VERBOSE */	yyerror ("syntax error");    }  if (yyerrstatus == 3)    {      /* If just tried and failed to reuse lookahead token after an	 error, discard it.  */      if (yychar <= YYEOF)        {          /* If at end of input, pop the error token,	     then the rest of the stack, then return failure.  */	  if (yychar == YYEOF)	     for (;;)	       {		 YYPOPSTACK;		 if (yyssp == yyss)		   YYABORT;		 YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);		 yydestruct (yystos[*yyssp], yyvsp);	       }        }      else	{	  YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);	  yydestruct (yytoken, &yylval);	  yychar = YYEMPTY;	}    }  /* Else will try to reuse lookahead token after shifting the error     token.  */  goto yyerrlab1;/*---------------------------------------------------.| yyerrorlab -- error raised explicitly by YYERROR.  |`---------------------------------------------------*/yyerrorlab:#ifdef __GNUC__  /* Pacify GCC when the user code never invokes YYERROR and the label     yyerrorlab therefore never appears in user code.  */  if (0)     goto yyerrorlab;#endif  yyvsp -= yylen;  yyssp -= yylen;  yystate = *yyssp;  goto yyerrlab1;/*-------------------------------------------------------------.| yyerrlab1 -- common code for both syntax error and YYERROR.  |`-------------------------------------------------------------*/yyerrlab1:  yyerrstatus = 3;	/* Each real token shifted decrements this.  */  for (;;)    {      yyn = yypact[yystate];      if (yyn != YYPACT_NINF)	{	  yyn += YYTERROR;	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)	    {	      yyn = yytable[yyn];	      if (0 < yyn)		break;	    }	}      /* Pop the current state because it cannot handle the error token.  */      if (yyssp == yyss)	YYABORT;      YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);      yydestruct (yystos[yystate], yyvsp);      YYPOPSTACK;      yystate = *yyssp;      YY_STACK_PRINT (yyss, yyssp);    }  if (yyn == YYFINAL)    YYACCEPT;  YYDPRINTF ((stderr, "Shifting error token, "));  *++yyvsp = yylval;  yystate = yyn;  goto yynewstate;/*-------------------------------------.| yyacceptlab -- YYACCEPT comes here.  |`-------------------------------------*/yyacceptlab:  yyresult = 0;  goto yyreturn;/*-----------------------------------.| yyabortlab -- YYABORT comes here.  |`-----------------------------------*/yyabortlab:  yyresult = 1;  goto yyreturn;#ifndef yyoverflow/*----------------------------------------------.| yyoverflowlab -- parser overflow comes here.  |`----------------------------------------------*/yyoverflowlab:  yyerror ("parser stack overflow");  yyresult = 2;  /* Fall through.  */#endifyyreturn:#ifndef yyoverflow  if (yyss != yyssa)    YYSTACK_FREE (yyss);#endif  return yyresult;}#line 180 "parse_isa.y"static void warn(char *msg, Symbol ident) {	fprintf(stderr, "%s %s\n", msg, symbol_get_string(ident).c_str());}