verilog_parser.y

%require  "3.0"
%defines 
%define parse.trace
%verbose

%define parse.error verbose
 
%{
/*
** HDL4SE: 软件Verilog综合仿真平台
** Copyright (C) 2021-2021, raoxianhong<raoxianhong@163.net>
** LCOM: 轻量级组件对象模型
** Copyright (C) 2021-2021, raoxianhong<raoxianhong@163.net>
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
**
** * Redistributions of source code must retain the above copyright notice,
**   this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright notice,
**   this list of conditions and the following disclaimer in the documentation
**   and/or other materials provided with the distribution.
** * The name of the author may be used to endorse or promote products
**   derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
** THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
* verilog_parser.y
  修改记录：
    202105280612: rxh, initial version
    202106291739: rxh, 表达式运算符优先级的语法实现，规范中没有给出运算符优先级的语法表达
*/

    #include <stdio.h> 
    #include <string.h>
    #include <assert.h>
    #include "object.h"
    #include "dlist.h"
    #include "conststring.h"
    #include "verilog_keyword.h"
    #include "bignumber.h"
    #include "mapstr2ptr.h"
    #include "verilog_parsetree.h"

    extern int yylex();
    extern int yylineno;
    extern char * yytext;

    HOBJECT lastport = NULL;
    HOBJECT lastparameter = NULL;
    HOBJECT currentmodule = NULL;
    static char logbuf[2048];
    void yyerror(const char *msg){
        IConstStringVar *pfilename;
        int lineno;
        int linepos;
        int filepos;
        pfilename = NULL;
        if (0 == hdl4se_parser_GetCurrentFile(&pfilename, &lineno, &linepos, &filepos)) {
            if (pfilename != NULL) {
                sprintf(logbuf, "file %s line %d - ERROR: %s\n - '%s'", pfilename->string, lineno, msg, yytext);
                hdl4se_parser_AddLog(logbuf);
            }
        }
    }
%} 
 
%code requires{
#include "stdio.h"
#include "object.h"
#include "dlist.h"
#include "bignumber.h"
#include "conststring.h"
#include "mapstr2ptr.h"
#include "verilog_parsetree.h"
#include "verilog_root.h"
#include "verilog_module.h"
#include "verilog_keyword.h"
#include "verilog_attrspec.h"
#include "verilog_parameter.h"
#include "verilog_expr.h"
#include "verilog_port.h"
#include "verilog_vardecl.h"
#include "verilog_varsel.h"
#include "verilog_paraminst.h"
#include "verilog_moduleinst.h"
#include "verilog_assignment.h"
#include "verilog_statement.h"
}

/* token types */
%union {
	HOBJECT treenode;
    HOBJECT obj;
    struct _mul_obj {
      int type;
      int objcount;
      HOBJECT obj[16];
    }mul_obj;
    struct _str_bind_obj {
        IConstStringVar * key;
        HOBJECT obj;
    }str_bind_obj;
	IConstStringVar * string;
	int token;
	int operator;
	int ival;
	IDListVar* list;
}

%token <string> END  ANY  NEWLINE  SPACE  TAB

%token <string> BIN_VALUE  OCT_VALUE  HEX_VALUE  DEC_VALUE  
				DEC_BASE  BIN_BASE  OCT_BASE  HEX_BASE  
				NUM_REAL  NUM_SIZE  UNSIGNED_NUMBER  
				SYSTEM_ID  SIMPLE_ID  ESCAPED_ID  DEFINE_ID  
				STRING

/* Operators Precedence */
%token <token> '@' ',' '#' '.' '=' ':' ';' '(' ')' '[' ']' '{' '}' '+' '-' '*' '/' '%' '>' '<' '!' '&' '|' '^' '~' '?' 

%token <token> ATTRIBUTE_START ATTRIBUTE_END ASL ASR LSL LSR GTE LTE L_AND L_OR L_EQ C_EQ L_NEQ C_NEQ B_EQU B_NAND B_NOR IDX_PRT_SEL POW  T_AND
               STARTPLUSWIDTH STARTMINUSWIDTH MINUSGT EQGT STARGT

%token <token>  KW_ALWAYS  KW_AND  KW_ASSIGN  KW_AUTOMATIC  KW_BEGIN  KW_BUF  KW_BUFIF0  KW_BUFIF1  KW_CASE  KW_CASEX  
				KW_CASEZ  KW_CELL  KW_CMOS  KW_CONFIG  KW_DEASSIGN  KW_DEFAULT  KW_DEFPARAM  KW_DESIGN  KW_DISABLE  
				KW_EDGE  KW_ELSE  KW_END  KW_ENDCASE  KW_ENDCONFIG  KW_ENDFUNCTION  KW_ENDGENERATE  KW_ENDMODULE  
				KW_ENDPRIMITIVE  KW_ENDSPECIFY  KW_ENDTABLE  KW_ENDTASK  KW_EVENT  KW_FOR  KW_FORCE  KW_FOREVER  KW_FORK  
				KW_FUNCTION  KW_GENERATE  KW_GENVAR  KW_HIGHZ0  KW_HIGHZ1  KW_IF  KW_IFNONE  KW_INCDIR  KW_INCLUDE  
				KW_INITIAL  KW_INOUT  KW_INPUT  KW_INSTANCE  KW_INTEGER  KW_JOIN  KW_LARGE  KW_LIBLIST  KW_LIBRARY  
				KW_LOCALPARAM  KW_MACROMODULE  KW_MEDIUM  KW_MODULE  KW_NAN  KW_NEGEDGE  KW_NMOS  KW_NOR  KW_NOSHOWCANCELLED  
				KW_NOT  KW_NOTIF0  KW_NOTIF1  KW_OR  KW_OUTPUT  KW_PARAMETER  KW_PATHPULSE  KW_PMOS  KW_POSEDGE  KW_PRIMITIVE  
				KW_PULL0  KW_PULL1  KW_PULLDOWN  KW_PULLUP  KW_PULSESTYLE_ONEVENT  KW_PULSESTYLE_ONDETECT  KW_RCMOS  
				KW_REAL  KW_REALTIME  KW_REG  KW_RELEASE  KW_REPEAT  KW_RNMOS  KW_RPMOS  KW_RTRAN  KW_RTRANIF0  KW_RTRANIF1  
				KW_SCALARED  KW_SHOWCANCELLED  KW_SIGNED  KW_SMALL  KW_SPECIFY  KW_SPECPARAM  KW_STRONG0  KW_STRONG1  
				KW_SUPPLY0  KW_SUPPLY1  KW_TABLE  KW_TASK  KW_TIME  KW_TRAN  KW_TRANIF0  KW_TRANIF1  KW_TRI  KW_TRI0  
				KW_TRI1  KW_TRIAND  KW_TRIOR  KW_TRIREG  KW_UNSIGNED  KW_USE  KW_VECTORED  KW_WAIT  KW_WAND  KW_WEAK0  
				KW_WEAK1  KW_WHILE  KW_WIRE  KW_WOR  KW_XNOR  KW_XOR KW_NAND KW_UWIRE 
                KW_SYS_SETUP KW_SYS_HOLD KW_SYS_SETUPHOLD KW_SYS_RECOVERY KW_SYS_REMOVAL KW_SYS_RECREM KW_SYS_SKEW 
                KW_SYS_TIMESKEW KW_SYS_FULLSKEW KW_SYS_PERIOD KW_SYS_WIDTH KW_SYS_NOCHANGE 

/* Operator Precedence */


%right  '?'                 /* Lowest Precedence */
%left   L_OR
%left   L_AND
%left   '|' B_NOR
%left   B_EQU '^'
%left   B_NAND '&'
%left   L_EQ C_EQ L_NEQ C_NEQ
%left   '>' '<' GTE LTE
%left   LSL LSR ASR ASL
%left   '+' '-'
%left   '*' '/' '%'
%left   POW
%right  '!' '~'    /* Highest Precedence. */
				
%start grammar_begin

%type <string> attr_name identifier module_identifier 
               topmodule_identifier parameter_identifier
               port_identifier net_identifier
               module_instance_identifier
               number string unsigned_number 

%type <ival> parameter_type 
             unary_operator 
             binary_operator 
             signed_option
             unary_module_path_operator 
             binary_module_path_operator
             net_type net_type_option output_variable_type
             vectored_or_scalared_option vectored_option scalared_option

%type <mul_obj> range range_option constant_range_expression dimension  
                mintypmax_expression mintypmax_expression_option var
%type <str_bind_obj> port_ident param_assignment net_decl_assignment
                   

%type <treenode>  attr_spec 
%type <treenode>  constant_mintypmax_expression constant_primary
                  port parameter_declaration
                  port_declaration inout_declaration input_declaration output_declaration
                  port_reference
                  constant_base_expression
                  width_constant_expression
                  msb_constant_expression 
                  lsb_constant_expression
                  dimension_constant_expression
                  primary unary_expression pow_expression multiplicative_expression
                  additive_expression shift_expression relational_expression equality_expression
                  and_expression exclusive_or_expression inclusive_or_expression
                  logical_and_expression logical_or_expression conditional_expression 
                  expression expression_option
                  unary_constant_expression pow_constant_expression multiplicative_constant_expression
                  additive_constant_expression shift_constant_expression relational_constant_expression equality_constant_expression
                  and_constant_expression exclusive_or_constant_expression inclusive_or_constant_expression
                  logical_and_constant_expression logical_or_constant_expression conditional_constant_expression 
                  constant_expression
                  base_expression
                  module_instance
                  ordered_parameter_assignment named_parameter_assignment
                  named_port_connection ordered_port_connection
                  net_assignment
                  hierarchical_identifier_part
                  statement statement_or_null blocking_assignment  nonblocking_assignment

%type <list> attribute_instance_list attribute_instance attribute_instance_spec_list
             hierarchical_identifier 
%type <list> list_of_net list_of_net_identifiers list_of_net_decl_assignments

%type <list> dimension_list

%type <list> module_parameter_port_list module_param_list  
             list_of_param_assignments port_declaration_list
             list_of_port_connections_option

%type <list> module_instance_list parameter_value_assignment_option parameter_value_assignment
             list_of_parameter_assignments ordered_parameter_assignment_list named_parameter_assignment_list
             list_of_port_connections ordered_port_connection_list named_port_connection_list

%type <list> list_of_port_declarations
             list_of_ports module_item_list non_port_module_item_list 
             ports port_declarations port_expression

%type <list> list_of_net_assignments


%%

/* Start variables */
grammar_begin : 
  library_text {}
| source_text {}
| %empty {
}
;

/* A.1.1 Library Source Text */

library_text : 
  library_descriptions {}
| library_text library_descriptions{}
;

library_descriptions : 
  library_declaration{}
| include_statement{}
| config_declaration{}
;

library_declaration : 
  KW_LIBRARY library_identifier file_path_specs ';'{}
| KW_LIBRARY library_identifier file_path_specs KW_INCDIR file_path_specs ';'{}
;

file_path_specs : 
  file_path_spec{}
| file_path_specs ',' file_path_spec{}
;

file_path_spec : file_path{}
;

file_path : string {}
;

include_statement : KW_INCLUDE file_path_spec ';'{}
;
   
/* A.1.2  Verilog source text. */

source_text : 
  description {
  }
| source_text description{
}
;

description : 
  module_declaration {
  }
| udp_declaration {
}
| config_declaration {
}
;

module_item_list :
    %empty {
    }
|   module_item {
    }
|   module_item_list module_item {
    }
  ;

non_port_module_item_list :
    %empty {
    }
|   non_port_module_item {
    }
|   non_port_module_item_list non_port_module_item {
    }
  ;

module_declaration : 
  attribute_instance_list
  module_keyword
  module_identifier
  module_parameter_port_list
  list_of_ports
  ';'
  {
    IVerilogRoot ** ppRoot = getVerilogRoot();
	(*ppRoot)->add_module(ppRoot, $3, currentmodule = verilogparseCreateModuleDeclaration($1,$3,$4,$5));
    objectRelease($3);
    lastport = NULL;
    lastparameter = NULL;
  }
  module_item_list
  KW_ENDMODULE
{
/*
	IVerilogRoot ** ppRoot = getVerilogRoot();
	(*ppRoot)->add_module(ppRoot, $3, verilogparseCreateModuleDeclaration($1,$3,$4,$5));
    objectRelease($3);
    lastport = NULL;
    lastparameter = NULL;
*/
    currentmodule = NULL;
}  

| attribute_instance_list
  module_keyword
  module_identifier
  module_parameter_port_list
  list_of_port_declarations
  ';'
  {
	IVerilogRoot ** ppRoot = getVerilogRoot();
	(*ppRoot)->add_module(ppRoot, $3, currentmodule = verilogparseCreateModuleDeclaration($1,$3,$4,$5));
    objectRelease($3);
    lastport = NULL;
    lastparameter = NULL;

  }
  non_port_module_item_list
  KW_ENDMODULE
  {
/*
	IVerilogRoot ** ppRoot = getVerilogRoot();
	(*ppRoot)->add_module(ppRoot, $3, verilogparseCreateModuleDeclaration($1,$3,$4,$5));
    objectRelease($3);
    lastport = NULL;
    lastparameter = NULL;
    */
    currentmodule = NULL;
  }
;

module_keyword :
  KW_MODULE {
  }
| KW_MACROMODULE {
  }
  ;


/*
A.1.3 Module parameters and ports
*/

module_parameter_port_list  : 
   %empty {
    $$ = dlistCreate();
    lastparameter = NULL;
    }
|   '#' '(' module_param_list ')'{
    $$ = $3;
    lastparameter = NULL;
}
;

module_param_list : 
  parameter_declaration {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
  }
| module_param_list ',' parameter_declaration{
	$$ = $1;
	dlistAppendItem($$, $3);
}
;

list_of_ports :
    %empty {
    $$ = dlistCreate();
}
| '(' ports ')' {
    $$ = $2;
}
;

/*
我们不支持复杂端口定义 
*/
ports : 
    %empty {
	$$ = dlistCreate();
}
| ports ',' port_identifier{
    $$ = $1;
    dlistAppendItem($$,
        verilogparseCreatePort(
            NULL, /* IDListVarPtr attributes, */
            PORT_DIRECT_UNKNOW, /* int port_direct, */
            0, /* int port_type, */
            0, /* int port_issigned, */
            RANGE_TYPE_NONE, /*int range_type*/
            NULL, /* HOBJECT param_range_msb,  expression */
            NULL, /* HOBJECT param_range_lsb,  expression */
            $3, /* const char * name, */
            NULL /* HOBJECT expr */
        )
    );
}
| port_identifier {
    $$ = dlistCreate();
    dlistAppendItem($$,
        verilogparseCreatePort(
            NULL, /* IDListVarPtr attributes, */
            PORT_DIRECT_UNKNOW, /* int port_direct, */
            VAR_TYPE_NONE, /* int port_type, */
            0, /* int port_issigned, */
            RANGE_TYPE_NONE, /*int range_type*/
            NULL, /* HOBJECT param_range_msb,  expression */
            NULL, /* HOBJECT param_range_lsb,  expression */
            $1, /* const char * name, */
            NULL /* HOBJECT expr */
        )
    );
}
;

/*
ports : 
    %empty {
	$$ = dlistCreate();
}
| ports ',' port{
    $$ = $1;
    dlistAppendItem($$,$3);
}
| port {
    $$ = dlistCreate();
	dlistAppendItem($$,$1);
}
;
*/

list_of_port_declarations   : 
 '(' port_declarations ')'{
    $$ = $2;
}
;

port_declarations : 
  %empty { 
    $$ = dlistCreate();
  }
| port_declarations ',' port_declaration {
    $$ = $1;
    dlistAppendItem($$,$3);
  }
| port_declaration {
    $$ = dlistCreate();
	dlistAppendItem($$,$1);
  }
  ;

port            : 
  port_expression{
    $$ = $1;
  }
| '.' port_identifier '(' port_expression ')'{
   // $$ = verilogparserCreatePort($2, $4);
}
;

port_expression : 
   %empty {
	$$ = dlistCreate();
	}
| port_reference {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
  }
| port_expression ',' port_reference{
    $$ = $1;
    dlistAppendItem($$,$3);
}
;

port_reference  : 
  port_identifier{
  $$ = NULL;
}
| port_identifier '[' ']' {
  $$ = NULL;
}
| port_identifier '[' constant_range_expression ']' {
  $$ = NULL;
}
;

/*
port_declaration : 
    attribute_instance_list inout_declaration {
    }
|   attribute_instance_list input_declaration {
    }
|   attribute_instance_list output_declaration {
    }
  ;
*/
/*
  IEEE. 1364-2005的这种格式端口定义不满足LALR(1)，
  module test (
    input [7:0] a,
    input signed [7:0] b, c, d, 
    output [7:0] e, 
    output reg signed [7:0] f, g,
    output signed [7:0] h) ;
  endmodule
  原来的语法是分组描述的，然而注意每一组定义后面用逗号，
  与组内的标识符后的逗号冲突了，这样不满足LALR(1)的要求，
  现在改为为每个端口都是单独声明的，声明可以带属性也可以
  不带属性，不带属性的声明使用前面最近一个带属性的声明的
  属性。导致的问题有二：1.第一个端口必须是带属性的，这个
  应该由动作函数来做检查，2.output端口类型可以设置REG等属
  性并设置初始值，这是其他端口不能有的，这个也由动作函数
  来做检查吧。
  注意后面的input_declaration，input_declaration和
  output_declaration也做了相应的调整，每个后面不是跟一系列
  标识符，而是只跟一个port_ident了，这样就消除了冲突，满足
  LALR(1)的要求。
*/
port_declaration : 
    inout_declaration {
    $$ = $1;
    lastport = $1;
    }
|   input_declaration {
    $$ = $1;
    lastport = $1;
    }
|   output_declaration {
    $$ = $1;
    lastport = $1;
    }
|   port_ident {
       $$ = verilogparseCreatePort(
            NULL, /* IDListVarPtr attributes, */
            PORT_DIRECT_ASPRE, /* int port_direct, */
            VAR_TYPE_NONE, /* int port_type, */
            0, /* int port_issigned, */
            RANGE_TYPE_NONE, /*int range_type*/
            lastport, /* HOBJECT param_range_msb,  expression */
            NULL, /* HOBJECT param_range_lsb,  expression */
            $1.key, /* const char * name, */
            $1.obj /* HOBJECT expr */
        );
    }
;

/*
下面修改过的语法从A.2.1.2过来的
*/
inout_declaration :
    attribute_instance_list KW_INOUT net_type_option signed_option range_option 
    port_ident {
    $$ = verilogparseCreatePort(
            $1, /* IDListVarPtr attributes, */
            PORT_DIRECT_INOUT, /* int port_direct, */
            $3, /* int port_type, */
            $4, /* int port_issigned, */
            $5.type, /*int range_type*/
            $5.obj[0], /* HOBJECT param_range_msb,  expression */
            $5.obj[1], /* HOBJECT param_range_lsb,  expression */
            $6.key, /* const char * name, */
            $6.obj /* HOBJECT expr */
        );
    }
  ;

input_declaration :
    attribute_instance_list KW_INPUT net_type_option signed_option range_option 
    port_ident {
    $$ = verilogparseCreatePort(
            $1, /* IDListVarPtr attributes, */
            PORT_DIRECT_INPUT, /* int port_direct, */
            $3, /* int port_type, */
            $4, /* int port_issigned, */
            $5.type, /*int range_type*/
            $5.obj[0], /* HOBJECT param_range_msb,  expression */
            $5.obj[1], /* HOBJECT param_range_lsb,  expression */
            $6.key, /* const char * name, */
            $6.obj /* HOBJECT expr */
        );
    }
  ;

output_declaration :
    attribute_instance_list KW_OUTPUT net_type_option signed_option range_option 
    port_ident {
    $$ = verilogparseCreatePort(
            $1, /* IDListVarPtr attributes, */
            PORT_DIRECT_OUTPUT, /* int port_direct, */
            $3, /* int port_type, */
            $4, /* int port_issigned, */
            $5.type, /*int range_type*/
            $5.obj[0], /* HOBJECT param_range_msb,  expression */
            $5.obj[1], /* HOBJECT param_range_lsb,  expression */
            $6.key, /* const char * name, */
            $6.obj /* HOBJECT expr */
        );

    }
|   attribute_instance_list KW_OUTPUT KW_REG signed_option range_option
    port_ident {
    $$ = verilogparseCreatePort(
            $1, /* IDListVarPtr attributes, */
            PORT_DIRECT_OUTPUT, /* int port_direct, */
            VAR_TYPE_REG, /* int port_type, */
            $4, /* int port_issigned, */
            $5.type, /*int range_type*/
            $5.obj[0], /* HOBJECT param_range_msb,  expression */
            $5.obj[1], /* HOBJECT param_range_lsb,  expression */
            $6.key, /* const char * name, */
            $6.obj /* HOBJECT expr */
        );

    }
|   attribute_instance_list KW_OUTPUT output_variable_type 
    port_ident {
    $$ = verilogparseCreatePort(
            $1, /* IDListVarPtr attributes, */
            PORT_DIRECT_OUTPUT, /* int port_direct, */
            $3, /* int port_type, */
            0, /* int port_issigned, */
            RANGE_TYPE_NONE, /*int range_type*/
            NULL, /* HOBJECT param_range_msb,  expression */
            NULL, /* HOBJECT param_range_lsb,  expression */
            $4.key, /* const char * name, */
            $4.obj /* HOBJECT expr */
        );
    }
  ;


/* 
A.1.4 Module Items 
*/

port_declaration_list :
    inout_declaration {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    lastport = $1;
    }
|   input_declaration {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    lastport = $1;
    }
|   output_declaration {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    lastport = $1;
    }
|   port_declaration_list ',' port_ident {
    $$ = $1;
    dlistAppendItem($$, verilogparseCreatePort(
            NULL, /* IDListVarPtr attributes, */
            PORT_DIRECT_ASPRE, /* int port_direct, */
            VAR_TYPE_NONE, /* int port_type, */
            0, /* int port_issigned, */
            RANGE_TYPE_NONE, /*int range_type*/
            lastport, /* HOBJECT param_range_msb,  expression */
            NULL, /* HOBJECT param_range_lsb,  expression */
            $3.key, /* const char * name, */
            $3.obj /* HOBJECT expr */
        ));
    }

module_item :
    port_declaration_list {
    }
|   non_port_module_item {
    }
 ;

module_or_generate_item :
  module_or_generate_item_declaration {
  }
| attribute_instance_list local_parameter_declaration ';' {
  }
| attribute_instance_list parameter_override {
  }
| continuous_assign {
  }
| attribute_instance_list gate_instantiation {
  }
| attribute_instance_list udp_instantiation {
  }
| module_instantiation {
  }
| attribute_instance_list initial_construct {
  }
| always_construct {
  }
| attribute_instance_list loop_generate_construct {
  }
| attribute_instance_list conditional_generate_construct {
  }
  ;

module_or_generate_item_declaration :
  net_declaration {
    }
|  attribute_instance_list reg_declaration {
    }
|  attribute_instance_list integer_declaration {
    }
| attribute_instance_list real_declaration {
    }
| attribute_instance_list time_declaration {
    }
| attribute_instance_list realtime_declaration {
    }
| attribute_instance_list event_declaration {
    }
| attribute_instance_list genvar_declaration {
    }
| attribute_instance_list task_declaration {
    }
| attribute_instance_list function_declaration {
    }
 ;

non_port_module_item :
    module_or_generate_item {
    }
|   generate_region {
    }
|   specify_block {
    }
|   attribute_instance_list parameter_declaration ';' {
    }
|   attribute_instance_list specparam_declaration {
    }
   ;

parameter_override :
    KW_DEFPARAM list_of_defparam_assignments ';' {
    }
    ;

/*
A.1.5 Configuration source text
*/
config_declaration :
    KW_CONFIG config_identifier ';' 
    design_statement KW_ENDCONFIG {
    }
|   KW_CONFIG config_identifier ';' 
    design_statement config_rule_statement KW_ENDCONFIG {
    }
 ;

design_statement : 
    KW_DESIGN design_cell_list ';' {
    }
;

design_cell_list :
   %empty   {
  }
|  design_cell_list design_cell {
  } 
|  design_cell {
 }
 ;
 
design_cell :
  cell_identifier {
  }
| library_identifier '.' cell_identifier {
  }
  ;

config_rule_statement :
    default_clause liblist_clause ';' {
    }
|   inst_clause liblist_clause ';' {
    }
|   inst_clause use_clause ';' {
    }
|   cell_clause liblist_clause ';' {
    }
|   cell_clause use_clause ';' {
    }
 ;

default_clause :
  KW_DEFAULT {
  }
  ;

inst_clause :
    KW_INSTANCE inst_name {
    }
  ;

inst_name :
    topmodule_identifier {
    }
|   inst_name '.' instance_identifier {
    }
  ;

cell_clause : 
    KW_CELL cell_identifier {
    }
|   KW_CELL library_identifier '.' cell_identifier {
    }
 ;

liblist_clause :
    KW_LIBLIST {
    }
|   KW_LIBLIST library_identifier {
    }
 ;

use_clause :
    KW_USE cell_identifier {
    }
|   KW_USE cell_identifier ':' KW_CONFIG {
    }
|   KW_USE library_identifier '.' cell_identifier {
    }
|   KW_USE library_identifier '.' cell_identifier ':' KW_CONFIG {
    }
  ;

/*
A.2 Declarations
A.2.1 Declaration types
A.2.1.1 Module parameter declarations
*/

signed_option: 
   %empty  {
   $$ = 0;
 }
| KW_SIGNED {
   $$ = 1;
}
;

range_option: 
   %empty  {
  $$.type = RANGE_TYPE_NONE;
  $$.obj[0] = NULL;
  $$.obj[1] = NULL;
 }
| range {
 $$ = $1;
}
;

local_parameter_declaration :
    KW_LOCALPARAM signed_option range_option list_of_param_assignments {
    }
|   KW_LOCALPARAM parameter_type list_of_param_assignments{
    }
 ;

/*
  因不满足LALR(1)而修改。
parameter_declaration :
    KW_PARAMETER signed_option range_option list_of_param_assignments {
    }
|   KW_PARAMETER parameter_type list_of_param_assignments {
    }
;
*/

parameter_declaration :
    KW_PARAMETER signed_option range_option param_assignment {
        $$ = verilogparseCreateParameter(PARAM_TYPE_PARAM, PARAM_DATA_TYPE_INTEGER, 
                $2, 
                $3.type, $3.obj[0], $3.obj[1], 
                $4.key, $4.obj);
        lastparameter = $$;
    }
|   KW_PARAMETER parameter_type param_assignment {
        $$ = verilogparseCreateParameter(PARAM_TYPE_PARAM, $2, 
                0, 
                RANGE_TYPE_NONE, NULL, NULL, 
                $3.key, $3.obj);
        lastparameter = $$;
    }
|   param_assignment {
        $$ = verilogparseCreateParameter(PARAM_TYPE_ASPRE, 0, 
                0, 
                RANGE_TYPE_NONE, lastparameter, NULL, 
                $1.key, $1.obj);
    }
;


specparam_declaration : 
    KW_SPECPARAM range_option list_of_specparam_assignments ';' {
    }
   ;

parameter_type :
    KW_INTEGER {
    $$ = PARAM_DATA_TYPE_INTEGER;
    }
|   KW_REAL {
    $$ = PARAM_DATA_TYPE_REAL;
    } 
|   KW_REALTIME {
    $$ = PARAM_DATA_TYPE_REALTIME;
    }
|   KW_TIME {
    $$ = PARAM_DATA_TYPE_TIME;
    }
 ;

/*
A.2.1.2 Port declarations
*/

net_type_option :
   %empty   {
   $$ = VAR_TYPE_NONE;
  }
| net_type {
    $$ = $1;
  }
;

/*
inout_declaration :
    KW_INOUT net_type_option signed_option range_option 
    list_of_port_identifiers {
    }
  ;

input_declaration :
    KW_INPUT net_type_option signed_option range_option 
    list_of_port_identifiers {
    }
  ;

output_declaration :
    KW_OUTPUT net_type_option signed_option range_option 
    list_of_port_identifiers {
    }
|   KW_OUTPUT KW_REG signed_option range_option
    list_of_variable_port_identifiers {
    }
|   KW_OUTPUT output_variable_type 
    list_of_variable_port_identifiers {
    }
  ;
*/


/*
A.2.1.3 Type declarations
*/
event_declaration :
    KW_EVENT list_of_event_identifiers ';' {
    }
 ;

integer_declaration : KW_INTEGER list_of_variable_identifiers ';' {
    }
  ;
delay3_option: 
    %empty {
    }
|   delay3 {

    }
  ;

drive_strength_option :
    %empty    {
    }
|   drive_strength {
    }
  ;

vectored_option :
    %empty    {
    $$ = VS_NONE;
    }
|   KW_VECTORED {
    $$ = VS_VECTORED;
    }
  ;

scalared_option :
   %empty     {
   $$ = VS_NONE;
    }
|   KW_SCALARED {
    $$ = VS_SCALARED;
    }
 ;

charge_strength_option :
    %empty    {
    }
|   charge_strength {
    }
 ;

vectored_or_scalared_option : 
    %empty    {
    $$ = VS_NONE;
    } 
|   KW_VECTORED {
    $$ = VS_VECTORED;
    }
|   KW_SCALARED {
    $$ = VS_SCALARED;
    }
 ;

list_of_net :
    list_of_net_identifiers {
        $$ = $1;
    }
|   list_of_net_decl_assignments {
        $$ = $1;
    }
  ;

net_declaration :
/*    attribute_instance_list net_type signed_option
    delay3_option list_of_net_identifiers ';' {
    }
|   attribute_instance_list net_type drive_strength_option signed_option
    delay3_option list_of_net_decl_assignments ';' {
    }
|*/
    attribute_instance_list net_type drive_strength_option vectored_or_scalared_option signed_option
    range_option delay3_option list_of_net ';' {
        if (currentmodule == NULL) {
            yyerror("no current module");
        } else {
            IDListVar* list;
            IDListVarPtr pitem, pitemtemp;
            list = dlistCreate();
	        pitem = $8->__dlist_pNext; 
	        while (!IsDListHeader(pitem)) {
		        pitemtemp = pitem->__dlist_pNext;
                dlistDetach(pitem);               
                verilogparseVarDeclSetOptions(pitem, 
                    $2,  //int type,
                    $1,  //IDListVar* attributes,
                    $4,  //int vectored_or_scalared,
                    $5, //int issigned,
                    $6.type, //int range_type,
                    $6.obj[0], //HOBJECT range_msb,
                    $6.obj[1] //HOBJECT range_lsb
                    );
                dlistAppendItem(list, pitem);
		        pitem = pitemtemp;
	        }
            objectRelease($8);
            verilogparseAddModuleItems(currentmodule, list, MODULE_ITEM_TYPE_NET_DECLARATION);
        }
    }
/*
|   attribute_instance_list net_type scalared_option signed_option
    range delay3_option list_of_net_identifiers ';' {
    }

|   attribute_instance_list net_type drive_strength_option vectored_option 
    scalared_option signed_option
    range delay3_option list_of_net_decl_assignments ';' {
    }
*/
|   attribute_instance_list KW_TRIREG charge_strength_option signed_option
    delay3_option list_of_net_identifiers ';'
|   attribute_instance_list KW_TRIREG drive_strength_option signed_option
    delay3_option list_of_net_decl_assignments ';' {
    }
|   attribute_instance_list KW_TRIREG charge_strength_option vectored_or_scalared_option signed_option
    range delay3_option list_of_net_identifiers ';' {
    }
|   attribute_instance_list KW_TRIREG drive_strength_option vectored_or_scalared_option signed_option
    range delay3_option list_of_net_decl_assignments ';' {
    }
 ;

real_declaration :
    KW_REAL list_of_real_identifiers ';' {
    }
  ;

realtime_declaration : 
    KW_REALTIME list_of_real_identifiers ';' {
    }
  ;

reg_declaration :
    KW_REG signed_option range_option
    list_of_variable_identifiers ';' {
    }
  ;

time_declaration : 
    KW_TIME list_of_variable_identifiers ';' {
    }
  ;

/*
A.2.2 Declaration data types
A.2.2.1 Net and variable types
*/
net_type :
    KW_SUPPLY0 {
    $$ = VAR_TYPE_SUPPLY0;
    }
|   KW_SUPPLY1 {
    $$ = VAR_TYPE_SUPPLY1;
    }
|   KW_TRI {
    $$ = VAR_TYPE_TRI;
    } 
|   KW_TRIAND  {
    $$ = VAR_TYPE_TRIAND;
    }
|   KW_TRIOR  {
    $$ = VAR_TYPE_TRIOR;
    }
|   KW_TRI0  {
    $$ = VAR_TYPE_TRI0;
    }
|   KW_TRI1 {
    $$ = VAR_TYPE_TRI1;
    }
|   KW_UWIRE  {
    $$ = VAR_TYPE_UWIRE;
    }
|   KW_WIRE  {
    $$ = VAR_TYPE_WIRE;
    }
|   KW_WAND  {
    $$ = VAR_TYPE_WAND;
    }
|   KW_WOR {
    $$ = VAR_TYPE_WOR;
    }
  ;

output_variable_type : 
    KW_INTEGER  {
    $$ = VAR_TYPE_INTEGER;
    }
|   KW_TIME {
    $$ = VAR_TYPE_TIME;
    }
 ;

dimension_list :
     %empty   {
     $$ = dlistCreate();
    }
| dimension_list dimension {
     $$ = $1;
     dlistAppendItem($$, $2.obj[0]);
     dlistAppendItem($$, $2.obj[1]);
    }
| dimension {
     $$ = dlistCreate();
     dlistAppendItem($$, $1.obj[0]);
     dlistAppendItem($$, $1.obj[1]);
}
;

real_type :
    real_identifier dimension_list {
    }
|   real_identifier '=' constant_expression {
    }
 ;
variable_type :
    variable_identifier dimension_list {
    }
|   variable_identifier '=' constant_expression {
    }
 ;
 
/*
A.2.2.2 Strengths 
*/

drive_strength :
    '(' strength0 ',' strength1 ')' {
    }
|   '(' strength1 ',' strength0 ')' {
    }
|   '(' strength0 ',' KW_HIGHZ1 ')' {
    }
|   '(' strength1 ',' KW_HIGHZ0 ')' {
    }
|   '(' KW_HIGHZ0 ',' strength1 ')' {
    }
|   '(' KW_HIGHZ1 ',' strength0 ')' {
    }
  ;
strength0 : 
    KW_SUPPLY0  {
    }
|   KW_STRONG0  {
    }
|   KW_PULL0  {
    }
|   KW_WEAK0 {
    }
 ;

strength1 : 
    KW_SUPPLY1  {
    }
|   KW_STRONG1  {
    }
|   KW_PULL1  {
    }
|   KW_WEAK1 {
    }
  ;

charge_strength : 
    '(' KW_SMALL ')' {
    } 
|   '(' KW_MEDIUM ')'  {
    }
|   '(' KW_LARGE ')' {
    }
 ;

/*
A.2.2.3 Delays
*/

delay3 :
    '#' delay_value {
    }
|   '#' '(' mintypmax_expression ')' {
    }
|   '#' '(' mintypmax_expression ',' mintypmax_expression ')' {
    }
|   '#' '(' mintypmax_expression ',' mintypmax_expression ',' mintypmax_expression ')' {
    }
 ;

delay2 :
    '#' delay_value {
    }
|   '#' '(' mintypmax_expression ')' {
    }
|   '#' '(' mintypmax_expression ',' mintypmax_expression ')' {
    }
 ;

delay_value :
    unsigned_number {
    }
|   NUM_REAL {
    }
|   identifier {
    }
 ;

/*
A.2.3 Declaration lists
*/
list_of_defparam_assignments :
    defparam_assignment {
    }
|   list_of_defparam_assignments  ',' defparam_assignment {
    }
 ;

list_of_dimensions:
    dimension {
    }
|   list_of_dimensions  ',' dimension {
    }
 ;

list_of_event_identifiers : 
    event_identifier list_of_dimensions {
    }
|   list_of_event_identifiers ',' event_identifier list_of_dimensions {
    }
  ;

list_of_net_decl_assignments :
    net_decl_assignment {
    HOBJECT vardecl;
    vardecl = verilogparseCreateVarDecl($1.key);
    objectRelease($1.key);
    verilogparseVarDeclSetAssignExpr(vardecl, $1.obj);
    objectRelease($1.obj);
    $$ = dlistCreate();
    dlistAppendItem($$, vardecl);
    }
|   list_of_net_decl_assignments  ',' net_decl_assignment {
    HOBJECT vardecl;
    vardecl = verilogparseCreateVarDecl($3.key);
    objectRelease($3.key);
    verilogparseVarDeclSetAssignExpr(vardecl, $3.obj);
    objectRelease($3.obj);
    $$ = $1;
    dlistAppendItem($$, vardecl);
    }
 ;

list_of_net_identifiers : 
    net_identifier dimension_list {
    HOBJECT vardecl;
    $$ = dlistCreate();
    dlistAppendItem($$, vardecl = verilogparseCreateVarDecl($1));
    verilogparseVarDeclSetDimensions(vardecl, $2);
    objectRelease($1);
    }
|   list_of_net_identifiers  ',' net_identifier dimension_list {
    HOBJECT vardecl;
    $$ = $1;
    dlistAppendItem($$, vardecl = verilogparseCreateVarDecl($3));
    verilogparseVarDeclSetDimensions(vardecl, $4);
    objectRelease($4);
    objectRelease($3);
    }
  ;

list_of_event_identifiers : 
    net_identifier list_of_dimensions {
    }
|   list_of_event_identifiers ',' net_identifier list_of_dimensions {
    }
  ;

list_of_param_assignments :
    param_assignment {
    $$ = NULL;
    }
|   list_of_param_assignments  ',' param_assignment {
    $$ = NULL;
    }
 ;
 
 
list_of_port_identifiers :
    port_identifier {
    }
|   list_of_port_identifiers  ',' port_identifier {
    }
 ;
 
list_of_real_identifiers :
    real_type {
    }
|   list_of_real_identifiers  ',' real_type {
    }
 ;
 

list_of_specparam_assignments :
    specparam_assignment {
    }
|   list_of_specparam_assignments  ',' specparam_assignment {
    }
 ;
 
list_of_variable_identifiers :
    variable_type {
    }
|   list_of_variable_identifiers  ',' variable_type {
    }
 ;
 
port_ident :
    port_identifier {
    $$.key = $1;
    $$.obj = NULL;
    }
|   port_identifier '=' constant_expression {
    $$.key = $1;
    $$.obj = $3;
    }
 ;

list_of_variable_port_identifiers :
    port_ident {
    }
|   list_of_variable_port_identifiers  ',' port_ident {
    }
 ;

/*
A.2.4 Declaration assignments
*/

defparam_assignment : 
    hierarchical_parameter_identifier '=' constant_mintypmax_expression {
    }
  ;

net_decl_assignment : 
    net_identifier '=' expression {
    $$.key = $1;
    $$.obj = $3;
    }
|   net_identifier {
    $$.key = $1;
    $$.obj = NULL;
    }
  ;

param_assignment : 
    parameter_identifier '=' constant_mintypmax_expression {
    $$.key = $1;
    $$.obj = $3;
    }
  ;

specparam_assignment :
    specparam_identifier '=' constant_mintypmax_expression {
    }
|    pulse_control_specparam {
    }
 ;

/* 
    PATHPULSE$specify_input_terminal_descriptor$specify_output_terminal_descriptor 
    must be:
    1.PATHPULSE$identinput$identoutput
    1.PATHPULSE$identinput$identoutput '[' constant_range_expression ']'
    1.PATHPULSE$identinput '[' constant_range_expression ']' $identoutput
    1.PATHPULSE$identinput '[' constant_range_expression ']' $identoutput '[' constant_range_expression ']'
*/

pulse_control_specparam_lvalue :
    SIMPLE_ID /* PATHPULSE$identinput$identoutput */ {
    }
|   SIMPLE_ID /* PATHPULSE$identinput$identoutput  '[' constant_range_expression ']' */
    '[' constant_range_expression ']'  {
    }
|   SIMPLE_ID /* PATHPULSE$identinput '[' constant_range_expression ']' $identoutput*/
    '[' constant_range_expression ']' 
    SYSTEM_ID {
    }
|   SIMPLE_ID /* PATHPULSE$identinput '[' constant_range_expression ']'  $identoutput '[' constant_range_expression ']'*/
    '[' constant_range_expression ']' 
    SYSTEM_ID
    '[' constant_range_expression ']' {
    }
  ;
    
pulse_control_specparam : 
    KW_PATHPULSE '=' '(' reject_limit_value ')' {
    }
|   KW_PATHPULSE '=' '(' reject_limit_value ',' error_limit_value ')' {
    }
|   pulse_control_specparam_lvalue
    '=' '(' reject_limit_value ')' {
    }
|   pulse_control_specparam_lvalue
     '=' '(' reject_limit_value ',' error_limit_value ')' {
    }
  ;


error_limit_value : 
    limit_value {
    }
  ;

reject_limit_value : 
    limit_value {
    }
  ;

limit_value : 
    constant_mintypmax_expression {
    }
 ;

/*
A.2.5 Declaration ranges
*/
dimension : 
    '[' dimension_constant_expression ':' dimension_constant_expression ']' {
        $$.obj[0] = $2;
        $$.obj[1] = $4;
    }
 ;

range : '[' msb_constant_expression ':' lsb_constant_expression ']' {
      $$.type = RANGE_TYPE_PARTSELECT;
      $$.obj[0] = $2;
      $$.obj[1] = $4;
    }
  ;

/*
A.2.6 Function declarations
*/
automatic_option :
     %empty   {
    }
|   KW_AUTOMATIC { 
    }
  ;

function_range_or_type_option:
     %empty   {
    }
|   function_range_or_type {
    }
  ;

function_item_declaration_list:
    function_item_declaration {
    }
|   function_item_declaration_list function_item_declaration {
    }
 ;

block_item_declaration_list:
    %empty    {
    }
|   block_item_declaration {
    }
|   block_item_declaration_list block_item_declaration {
    }
 ;

function_range_or_type_option :
     %empty   {
    }
|   function_range_or_type {
    }
  ;

function_declaration :
    KW_FUNCTION automatic_option function_range_or_type_option function_identifier ';'
    function_item_declaration_list
    function_statement
    KW_ENDFUNCTION {
    }
|   KW_FUNCTION automatic_option function_range_or_type_option function_identifier '(' function_port_list ')' ';'
    block_item_declaration_list   
    function_statement
    KW_ENDFUNCTION {
    }
 ;

function_item_declaration :
    block_item_declaration
|   attribute_instance_list tf_input_declaration ';' {
    }
 ;

function_port_list :
    attribute_instance_list tf_input_declaration {
    }
|   function_port_list attribute_instance_list tf_input_declaration {
    }
  ;

function_range_or_type :
    signed_option range_option {
    }
|   KW_INTEGER {
    }
|   KW_REAL {
    }
|   KW_REALTIME {
    }
| KW_TIME {
    }
  ;

/*
A.2.7 Task declarations
*/
task_item_declaration_list :
     %empty   {
    }
|   task_item_declaration_list task_item_declaration {
    }
|   task_item_declaration {
    }
 ;

task_port_list_option:
     %empty   {
    }
|   task_port_list {
    }
  ;

task_declaration :
    KW_TASK automatic_option task_identifier ';'
    task_item_declaration_list
    statement_or_null
    KW_ENDTASK {
    }
|   KW_TASK automatic_option task_identifier '(' task_port_list_option ')' ';'
    block_item_declaration_list
    statement_or_null
    KW_ENDTASK {
    }
 ;

task_item_declaration :
    block_item_declaration {
    }
|   attribute_instance_list tf_input_declaration ';' {
    }
|   attribute_instance_list tf_output_declaration ';' {
    }
|   attribute_instance_list tf_inout_declaration ';' {
    }
  ;

task_port_list :
    task_port_item {
    }
|   task_port_list ',' task_port_item {
    }
 ;

task_port_item :
    attribute_instance_list tf_input_declaration {
    }
|   attribute_instance_list tf_output_declaration {
    }
|   attribute_instance_list tf_inout_declaration {
    }
  ;

reg_option :
    %empty    {
    }
|   KW_REG {
    }
  ;   

tf_input_declaration :
    KW_INPUT reg_option signed_option range_option list_of_port_identifiers {
    }
|   KW_INPUT task_port_type list_of_port_identifiers {
    }
  ;

tf_output_declaration :
    KW_OUTPUT reg_option signed_option range_option list_of_port_identifiers {
    }
|   KW_OUTPUT task_port_type list_of_port_identifiers {
    }
  ;

tf_inout_declaration :
    KW_INOUT reg_option signed_option range_option list_of_port_identifiers {
    }
|   KW_INOUT task_port_type list_of_port_identifiers {
    }
  ;

task_port_type :
    KW_INTEGER  {
    }
|   KW_REAL {
    }
|   KW_REALTIME {
    }
|   KW_TIME{
    }
  ;

/*
A.2.8 Block item declarations
*/
block_item_declaration :
    attribute_instance_list  KW_REG signed_option range_option list_of_block_variable_identifiers ';' {
    }
|   attribute_instance_list  KW_INTEGER list_of_block_variable_identifiers ';' {
    }
|   attribute_instance_list  KW_TIME list_of_block_variable_identifiers ';' {
    }
|   attribute_instance_list  KW_REAL list_of_block_real_identifiers ';' {
    }
|   attribute_instance_list  KW_REALTIME list_of_block_real_identifiers ';' {
    }
|   attribute_instance_list  event_declaration {
    }
|   attribute_instance_list  local_parameter_declaration ';' {
    }
|   attribute_instance_list  parameter_declaration ';' {
    }
  ;

list_of_block_variable_identifiers :
    block_variable_type {
    }
|   list_of_block_variable_identifiers  ',' block_variable_type {
    }
  ;

list_of_block_real_identifiers : 
    block_real_type {
    } 
|   list_of_block_real_identifiers ',' block_real_type {
    }
  ;

block_variable_type : 
    variable_identifier dimension_list {
    }
 ;

block_real_type : 
    real_identifier dimension_list {
    }
  ;

/*
A.3 Primitive instances
A.3.1 Primitive instantiation and instances
*/

cmos_switch_instance_list:
    cmos_switch_instance {
    }
|   cmos_switch_instance_list ',' cmos_switch_instance {
    }
  ;

enable_gate_instance_list:
    enable_gate_instance {
    }
|   enable_gate_instance_list ',' enable_gate_instance {
    }
  ;

mos_switch_instance_list:
    mos_switch_instance {
    }
|   mos_switch_instance_list ',' mos_switch_instance {
    }
  ;

n_input_gate_instance_list:
    n_input_gate_instance {
    }
|   n_input_gate_instance_list ',' n_input_gate_instance {
    }
  ;

n_output_gate_instance_list:
    n_output_gate_instance {
    }
|   n_output_gate_instance_list ',' n_output_gate_instance {
    }
  ;

pass_enable_switch_instance_list:
    pass_enable_switch_instance {
    }
|   pass_enable_switch_instance_list ',' pass_enable_switch_instance {
    }
  ;

pass_switch_instance_list:
    pass_switch_instance {
    }
|   pass_switch_instance_list ',' pass_switch_instance {
    }
  ;

pulldown_strength_option :
     %empty   {
    }
|   pulldown_strength {
    }
  ;

pullup_strength_option :
     %empty   {
    }
|   pullup_strength {
    }
  ;

pull_gate_instance_list:
    pull_gate_instance {
    }
|   pull_gate_instance_list ',' pull_gate_instance {
    }
  ;

delay2_option :
     %empty   {
    }
|   delay2 {
    }
  ;

gate_instantiation :
    cmos_switchtype delay3_option cmos_switch_instance_list ';' {
    }
|   enable_gatetype drive_strength_option delay3_option enable_gate_instance_list ';' {
    }
|   mos_switchtype delay3_option mos_switch_instance_list ';' {
    }
|   n_input_gatetype drive_strength_option delay2_option n_input_gate_instance_list ';' {
    }
|   n_output_gatetype drive_strength_option delay2_option n_output_gate_instance_list ';' { 
    }
|   pass_en_switchtype delay2_option pass_enable_switch_instance_list ';' {
    }
|   pass_switchtype pass_switch_instance_list ';' {
    }
|   KW_PULLDOWN pulldown_strength_option pull_gate_instance_list ';' {
    }
|   KW_PULLUP pullup_strength_option pull_gate_instance_list ';' {
    }
 ;

name_of_gate_instance_option :
    %empty    {
    }
|   name_of_gate_instance {
    }
  ;


input_terminal_list:
    input_terminal {
    }
|   input_terminal_list ',' input_terminal {
    }
  ;

output_terminal_list:
    output_terminal {
    }
|   output_terminal_list ',' output_terminal {
    }
  ;

cmos_switch_instance : 
    name_of_gate_instance_option '(' output_terminal ',' input_terminal ',' ncontrol_terminal ',' pcontrol_terminal ')' {
    }
 ;

enable_gate_instance : 
    name_of_gate_instance_option '(' output_terminal ',' input_terminal ',' enable_terminal ')' {
    }
  ;

mos_switch_instance : 
    name_of_gate_instance_option '(' output_terminal ',' input_terminal ',' enable_terminal ')' {
    }
  ;

n_input_gate_instance : 
    name_of_gate_instance_option '(' output_terminal ',' input_terminal_list ')' {
    }
  ;

n_output_gate_instance : 
    name_of_gate_instance_option '(' output_terminal_list ',' input_terminal ')' {
    }
  ;

pass_switch_instance : 
    name_of_gate_instance_option '(' inout_terminal ',' inout_terminal ')' {
    }
  ;

pass_enable_switch_instance : 
    name_of_gate_instance_option '(' inout_terminal ',' inout_terminal ',' enable_terminal ')' {
    }
  ;

pull_gate_instance : 
    name_of_gate_instance_option '(' output_terminal ')' {
    }
  ;

name_of_gate_instance : 
    gate_instance_identifier range_option {
    }
  ;

/*
A.3.2 Primitive strengths
*/

pulldown_strength :
    '(' strength0 ',' strength1 ')' {
    }
|   '(' strength1 ',' strength0 ')' {
    }
|   '(' strength0 ')' {
    }
  ;

pullup_strength :
    '(' strength0 ',' strength1 ')' {
    }
|   '(' strength1 ',' strength0 ')' {
    }
|   '(' strength1 ')' {
    }
  ;

/*
A.3.3 Primitive terminals
*/
enable_terminal : 
    expression {
    }
  ;

inout_terminal : 
    net_lvalue {
    }
  ;

input_terminal : 
    expression {
    }
  ;

ncontrol_terminal : 
    expression {
    }
  ;

output_terminal : 
    net_lvalue {
    }
  ;

pcontrol_terminal : 
    expression {
    }
  ;

/*
A.3.4 Primitive gate and switch types
*/
cmos_switchtype : 
    KW_CMOS  {
    }
|   KW_RCMOS {
    }
  ;
enable_gatetype : 
    KW_BUFIF0  {
    }
|   KW_BUFIF1 {
    }
|   KW_NOTIF0  {
    }
|   KW_NOTIF1 {
    }
  ;

mos_switchtype : 
    KW_NMOS  {
    }
|   KW_PMOS  {
    }
|   KW_RNMOS  {
    }
|   KW_RPMOS {
    }
  ;

n_input_gatetype : 
    KW_AND  {
    }
|   KW_NAND  {
    }
|   KW_OR  {
    }
|   KW_NOR  {
    }
|   KW_XOR  {
    }
|   KW_XNOR {
    }
  ;

n_output_gatetype : 
    KW_BUF {
    } 
|   KW_NOT {
    }
  ;

pass_en_switchtype : 
    KW_TRANIF0 {
    }
|   KW_TRANIF1 {
    }
|   KW_RTRANIF1 {
    }
|   KW_RTRANIF0 {
    }
  ;

pass_switchtype : 
    KW_TRAN  {
    }
|   KW_RTRAN {
    }
  ;

/*
A.4 Module instantiation and generate construct
A.4.1 Module instantiation
*/
parameter_value_assignment_option :
     %empty   {
     $$ = dlistCreate();
    }
| parameter_value_assignment {
     $$ = $1;
    }
 ;

module_instance_list:
    module_instance {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   module_instance_list ',' module_instance {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;

module_instantiation :
    attribute_instance_list module_identifier parameter_value_assignment_option module_instance_list ';' {
    	IDListVarPtr pitem, pitemtemp;
	    if (dlistItemCount($4) > 0) {
	        pitem = $4->__dlist_pNext; 
	        while (pitem != $4) {
		        pitemtemp = pitem->__dlist_pNext;
                verilogparseSetModuleInstanceOption(
                    pitem, //HOBJECT inst,
                    $1, //IDListVarPtr attributes,
                    $2, //const char * modulename,
                    $3  //IDListVarPtr parameter_value_assignment
                );
		        pitem = pitemtemp;
	        }
            verilogparseAddModuleItems(currentmodule, $4, MODULE_ITEM_TYPE_MODULE_INSTANCE);
        }
    }
 ;

parameter_value_assignment : 
    '#' '(' list_of_parameter_assignments ')' {
    $$ = $3;
    }
  ;

ordered_parameter_assignment_list:
    ordered_parameter_assignment {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   ordered_parameter_assignment_list ',' ordered_parameter_assignment {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;

named_parameter_assignment_list:
    named_parameter_assignment {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   named_parameter_assignment_list ',' named_parameter_assignment {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;

list_of_parameter_assignments :
    ordered_parameter_assignment_list {
        int index; 
        IDListVarPtr pitem, pitemtemp;
        $$ = $1;
        index = 0;
	    if ($$ != NULL) {
	        pitem = $$->__dlist_pNext; 
	        while (pitem != $$) {
		        pitemtemp = pitem->__dlist_pNext;
                verilogparseSetParamInstanceIndex(pitem, index);
                index++;
		        pitem = pitemtemp;
	        }
        }
    }
|   named_parameter_assignment_list {
    $$ = $1;
    }
  ;

ordered_parameter_assignment : 
    expression {
        $$ = verilogparseCreateParamInstance(
            NULL, //const char* name,
            1, //int exprcount,
            $1, //HOBJECT expr0,
            NULL, //HOBJECT expr1,
            NULL, //HOBJECT expr2,
            NULL //IDListVarPtr attributes
            );
    }
  ;

mintypmax_expression_option:
      %empty  {
      $$.objcount = 0;
    }
|   mintypmax_expression {
      $$ = $1;
    }
  ;

named_parameter_assignment : 
    '.' parameter_identifier '(' mintypmax_expression_option ')' {
        $$ = verilogparseCreateParamInstance(
            $2, //const char* name,
            $4.objcount, //int exprcount,
            $4.obj[0], //HOBJECT expr0, /*用mintymax方式传参数，估计只有用在delay中才用得上了*/
            $4.obj[1], //HOBJECT expr1,
            $4.obj[2], //HOBJECT expr2,
            NULL //IDListVarPtr attributes
            );
    }
  ;

list_of_port_connections_option:
    %empty  {
    $$ = dlistCreate();
    }
|   list_of_port_connections {
    $$ = $1;
    }
  ;

/*
module_instance : 
    name_of_module_instance '(' list_of_port_connections_option ')' {
    }
  ;
*/
module_instance : 
    module_instance_identifier range_option '(' list_of_port_connections_option ')' {
    $$ = verilogparseCreateModuleInstance(
            $1, //const char * instname,
            $2.type, // int range_type,
            $2.obj[0], //HOBJECT range_msb,这个range很奇怪，不知道如何使用
            $2.obj[1], //HOBJECT range_lsb,
            $4 //IDListVarPtr port_connections
        );
    }
  ;

/*
name_of_module_instance : 
    module_instance_identifier range_option {
    }
  ;
*/

ordered_port_connection_list:
    ordered_port_connection {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   ordered_port_connection_list ',' ordered_port_connection {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;

named_port_connection_list:
    named_port_connection {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   named_port_connection_list ',' named_port_connection {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;


list_of_port_connections :
    ordered_port_connection_list {
        int index; 
        IDListVarPtr pitem, pitemtemp;
        $$ = $1;
        index = 0;
	    if ($$ != NULL) {
	        pitem = $$->__dlist_pNext; 
	        while (pitem != $$) {
		        pitemtemp = pitem->__dlist_pNext;
                verilogparseSetParamInstanceIndex(pitem, index);
                index++;
		        pitem = pitemtemp;
	        }
        }
    }
|   named_port_connection_list {
    $$ = $1;
    }
  ;

expression_option:
    %empty    {
    $$ = NULL;
    }
|   expression {
    $$ = $1;
    }
  ;

ordered_port_connection : 
    attribute_instance_list expression_option {
    $$ = verilogparseCreateParamInstance(
            NULL, //const char* name,
            1, //int exprcount,
            $2, //HOBJECT expr0,
            NULL, //HOBJECT expr1,
            NULL, //HOBJECT expr2,
            $1 //IDListVarPtr attributes
            );
    }
  ;

named_port_connection : 
    attribute_instance_list '.' port_identifier '(' expression_option ')' {
    $$ = verilogparseCreateParamInstance(
            $3, //const char* name,
            1, //int exprcount,
            $5, //HOBJECT expr0,
            NULL, //HOBJECT expr1,
            NULL, //HOBJECT expr2,
            $1 //IDListVarPtr attributes
            );

    }
  ;

/*
A.4.2 Generate construct
*/

module_or_generate_item_list:
     %empty   {
    }
|   module_or_generate_item {
    }
|   module_or_generate_item_list  module_or_generate_item {
    }
  ;


generate_region :
    KW_GENERATE module_or_generate_item_list KW_ENDGENERATE {
    }
  ;

genvar_declaration : 
    KW_GENVAR list_of_genvar_identifiers ';' {
    }
  ;

list_of_genvar_identifiers :
    genvar_identifier  {
    }
|   list_of_genvar_identifiers ',' genvar_identifier {
    }
  ;

loop_generate_construct :
    KW_FOR '(' genvar_initialization ';' genvar_expression ';' genvar_iteration ')'
    generate_block {
    }
  ;

genvar_initialization :
    genvar_identifier '=' constant_expression {
    }
  ;

genvar_expression :
    genvar_primary {
    }
|   unary_operator attribute_instance_list genvar_primary {
    }
|   genvar_expression binary_operator attribute_instance_list genvar_expression {
    }
|   genvar_expression '?' attribute_instance_list genvar_expression ':' genvar_expression {
    }
  ;

genvar_iteration :
    genvar_identifier '=' genvar_expression {
    }
  ;

genvar_primary :
    constant_primary {
    }
|   genvar_identifier {
    }
  ;

conditional_generate_construct :
    if_generate_construct {
    }
|   case_generate_construct {
    }
  ;

if_generate_construct :
    KW_IF '(' constant_expression ')' generate_block_or_null {
    }
|   KW_IF '(' constant_expression ')' generate_block_or_null KW_ELSE generate_block_or_null {
    }
  ;


case_generate_item_list:
    case_generate_item {
    }
|   case_generate_item_list  case_generate_item {
    }
  ;

case_generate_construct :
    KW_CASE '(' constant_expression ')' case_generate_item_list KW_ENDCASE {
    }
  ;

constant_expression_list:
    constant_expression {
    }
|   constant_expression_list  constant_expression {
    }
  ;

case_generate_item :
    constant_expression_list ':' generate_block_or_null {
    }
|   KW_DEFAULT generate_block_or_null {
    }
|   KW_DEFAULT ':' generate_block_or_null {
    }
  ;

module_or_generate_item_list :
     %empty   {
    }
|   module_or_generate_item_list module_or_generate_item {
    }
|   module_or_generate_item {   
    }
  ;

generate_block :
    module_or_generate_item {
    }
|   KW_BEGIN  ':' generate_block_identifier module_or_generate_item_list KW_END {
    }
|   KW_BEGIN module_or_generate_item_list KW_END {
    }
  ;

generate_block_or_null :
    generate_block {
    }
|   ';' {
    }
  ;

/*
A.5 UDP declaration and instantiation
A.5.1 UDP declaration
*/

udp_port_declaration_list :
    udp_port_declaration_list udp_port_declaration {
    }
|   udp_port_declaration {   
    }
  ;

udp_declaration :
    attribute_instance_list KW_PRIMITIVE udp_identifier '(' udp_port_list ')' ';'
    udp_port_declaration_list 
    udp_body
    KW_ENDPRIMITIVE {
    }
|   attribute_instance_list KW_PRIMITIVE udp_identifier '(' udp_declaration_port_list ')' ';'
    udp_body
    KW_ENDPRIMITIVE {
    }
  ;

/*
A.5.2 UDP ports
*/

udp_port_list : 
    output_port_identifier ',' input_port_identifier {
    }
|   udp_port_list ',' input_port_identifier {
    }
  ;

udp_declaration_port_list :
    udp_output_declaration ',' udp_input_declaration{
    } 
|   udp_declaration_port_list ',' udp_input_declaration {
    }
  ;

udp_port_declaration :
    udp_output_declaration ';' {
    }
|   udp_input_declaration ';' {
    }
|   udp_reg_declaration ';' {
    }
  ;

udp_output_declaration :
    attribute_instance_list KW_OUTPUT port_identifier {
    }
|   attribute_instance_list KW_OUTPUT KW_REG port_identifier {
    }
|   attribute_instance_list KW_OUTPUT KW_REG port_identifier '=' constant_expression {
    }
  ;

udp_input_declaration : 
    attribute_instance_list KW_INPUT list_of_port_identifiers {
    }
  ;

udp_reg_declaration : 
    attribute_instance_list KW_REG variable_identifier {
    }
  ;

/*
A.5.3 UDP body
*/

udp_body :
    combinational_body  {
    }
|   sequential_body {
    }
  ;

combinational_entry_list :
    combinational_entry {
    } 
|   combinational_entry_list  combinational_entry {
    }
  ;

combinational_body : 
    KW_TABLE combinational_entry_list KW_ENDTABLE {
    }
  ;

combinational_entry : 
    level_input_list ':' output_symbol ';' {
    }
  ;

sequential_entry_list :
    sequential_entry {
    } 
|   sequential_entry_list  sequential_entry {
    }
  ;

sequential_body : 
    KW_TABLE sequential_entry_list KW_ENDTABLE {
    }
|   udp_initial_statement KW_TABLE sequential_entry_list KW_ENDTABLE {
    }
  ;

udp_initial_statement : 
    KW_INITIAL output_port_identifier '=' init_val ';' {
    }
  ;

init_val : 
    number {
    }
  ;
  /* 1'b0 | 1'b1 | 1'bx | 1'bX | 1'B0 | 1'B1 | 1'Bx | 1'BX | 1 | 0 */

sequential_entry : 
    seq_input_list ':' current_state ':' next_state ';' {
    }
  ;
seq_input_list : 
    level_input_list {
    }
|   edge_input_list {
    }
  ;

level_input_list : 
    level_symbol {
    }
| level_input_list level_symbol {
    }
  ;

level_symbol_list :
    %empty    {
    }
|   level_symbol {
    }
|   level_symbol_list level_symbol {
    }
  ;

edge_input_list : 
    level_symbol_list edge_indicator level_symbol_list {
    }
  ;

edge_indicator : 
    '(' level_symbol level_symbol ')'  {
    }
| edge_symbol {
    }
  ;

current_state : 
    level_symbol {
    }
  ;

next_state : 
    output_symbol  {
    }
|   '-' {
    }
  ;


output_symbol : 
    unsigned_number {
    }
|   '?'   {
    }
|   SIMPLE_ID {
    }
  ;

level_symbol :
    unsigned_number {
    }
|   '?' {
    }
|   SIMPLE_ID {
    }
 ;

edge_symbol : /* can be r,f,p,n or star in any case. */
    SIMPLE_ID {
    }
|   '*' {
    }
  ;

/*
fixed me!
output_symbol ::= 0 | 1 | x | X
level_symbol ::= 0 | 1 | x | X | ? | b | B
edge_symbol ::= r | R | f | F | p | P | n | N | *
*/

/*
A.5.4 UDP instantiation
*/

udp_instance_list :
    udp_instance {
    }
|   udp_instance_list ',' udp_instance {
    }
  ;


udp_instantiation : 
    udp_identifier drive_strength_option delay2_option
    udp_instance_list ';' {
    }
  ;

input_terminal_list :
    input_terminal {
    }
|   input_terminal_list ',' input_terminal {
    }
  ;


udp_instance : 
    name_of_udp_instance '(' output_terminal ',' input_terminal_list ')' {
    }
|   '(' output_terminal ',' input_terminal_list ')' {
    }
  ;

name_of_udp_instance : 
    udp_instance_identifier range_option {
    }
  ;

/*
A.6 Behavioral statements
A.6.1 Continuous assignment statements
*/
continuous_assign : 
    attribute_instance_list KW_ASSIGN drive_strength_option delay3_option list_of_net_assignments ';' {
        if (currentmodule == NULL) {
            yyerror("no current module");
        } else {
            IDListVarPtr pitem, pitemtemp;
	        pitem = $5->__dlist_pNext; 
	        while (!IsDListHeader(pitem)) {
		        pitemtemp = pitem->__dlist_pNext;
                verilog_Assignment* assignment = verilogAssignmentGetData(pitem);
                assignment->attributes = $1;
		        pitem = pitemtemp;
	        }
            verilogparseAddModuleItems(currentmodule, $5, MODULE_ITEM_TYPE_CONTINUOUS_ASSIGNMENT);
        }
    }
  ;

list_of_net_assignments : 
    net_assignment {
        $$ = dlistCreate();
        dlistAppendItem($$, $1);
    }
|   list_of_net_assignments ',' net_assignment {
        $$ = $1;
        dlistAppendItem($$, $3);
    }
  ;

/*
net_assignment : 
    net_lvalue '=' expression {
    }
  ;
*/

net_assignment : 
    var '=' expression {
        $$ = verilogparseCreateAssignment(
            0,
	        $1.obj[0], /* IDListVarPtr hierarchical_identifier */
	        $1.obj[1], /* IDListVarPtr element_select */
            $1.type, //int range_type,
	        1, /* int constelementsel */
	        $3, /* HOBJECT expr */
	        NULL /* IDListVarPtr attributes */
        );
    }
  ;


/*
A.6.2 Procedural blocks and assignments
*/
initial_construct :
    KW_INITIAL statement {
    }
  ;

always_construct : 
    attribute_instance_list KW_ALWAYS statement {
    verilogparseAddModuleItems(currentmodule, $3, MODULE_ITEM_TYPE_ALWAYS_CONSTRUCT);
    }
  ;

delay_or_event_control_option :
     %empty   {
    }
|   delay_or_event_control {
    }
  ;

blocking_assignment : 
    attribute_instance_list var '=' delay_or_event_control_option expression {
        $$ = verilogparseCreateAssignmentStatement(
            TIMECONTROL_NONE,
            STATEMENT_BLOCKING_ASSIGNMENT,
            verilogparseCreateAssignment(
                0,
	            $2.obj[0], /* IDListVarPtr hierarchical_identifier */
	            $2.obj[1], /* IDListVarPtr element_select */
                $2.type, //int range_type,
	            1, /* int constelementsel */
	            $5, /* HOBJECT expr */
	            $1 /* IDListVarPtr attributes */
            )
        );
    }
/* 
    variable_lvalue '=' expression
|   variable_lvalue '=' delay_or_event_control_option  expression {
    }
*/
  ;

nonblocking_assignment : 
    attribute_instance_list var LTE delay_or_event_control_option expression {
        $$ = verilogparseCreateAssignmentStatement(
            TIMECONTROL_NONE,
            STATEMENT_NONBLOCKING_ASSIGNMENT,
            verilogparseCreateAssignment (
                1,
	            $2.obj[0], /* IDListVarPtr hierarchical_identifier */
	            $2.obj[1], /* IDListVarPtr element_select */
                $2.type, //int range_type,
	            1, /* int constelementsel */
	            $5, /* HOBJECT expr */
	            $1 /* IDListVarPtr attributes */
            )
        );
    }
/*
    variable_lvalue LTE delay_or_event_control_option expression {
    }
*/
  ;
procedural_continuous_assignments :
    KW_ASSIGN variable_assignment {
    }
|   KW_DEASSIGN variable_lvalue {
    }
|   KW_FORCE variable_assignment {
    }
|   KW_FORCE net_assignment {
    }
|   KW_RELEASE variable_lvalue {
    }
|   KW_RELEASE net_lvalue {
    }
  ;

variable_assignment : 
    variable_lvalue '=' expression {
    }
  ;

/*
A.6.3 Parallel and sequential blocks
*/
block_item_declaration_list:
    %empty    {
    }
|   block_item_declaration {
    }
|   block_item_declaration_list block_item_declaration {
    }
  ;

statement_list:
    %empty    {
    }
|   statement {
    }
|   statement_list statement {
    }
  ;

par_block : 
    KW_FORK statement_list KW_JOIN {
    }
|   KW_FORK ':' block_identifier block_item_declaration_list statement_list KW_JOIN {
    }
  ;

seq_block : 
    KW_BEGIN statement_list KW_END {
    }
|   KW_BEGIN  ':' block_identifier block_item_declaration_list statement_list KW_END {
    }
  ;

/*
A.6.4 Statements
*/
statement :
    blocking_assignment ';' {
    $$ = 1;
    }
|   attribute_instance_list case_statement {
    }
|   conditional_statement {
    }
|   attribute_instance_list disable_statement {
    }
|   attribute_instance_list event_trigger {
    }
|   attribute_instance_list loop_statement {
    }
|   nonblocking_assignment ';' {
    $$ = 1;
    }
|   attribute_instance_list par_block {
    }
|   attribute_instance_list procedural_continuous_assignments ';' {
    }
|   attribute_instance_list procedural_timing_control_statement {
    }
|   attribute_instance_list seq_block {
    }
|   attribute_instance_list system_task_enable {
    }
|   attribute_instance_list task_enable {
    }
|   attribute_instance_list wait_statement {
    }
  ;

statement_or_null :
    statement {
    $$ = $1;
    }
|   attribute_instance_list ';' {
    /*$$ = NULL*/
    }
  ;

function_statement : 
    statement {
    }
  ;

/*
A.6.5 Timing control statements
*/
delay_control :
    '#' delay_value {
    }
|   '#' '(' mintypmax_expression ')' {
    }
  ;

delay_or_event_control :
    delay_control {
    }
|   event_control {
    }
|   KW_REPEAT '(' expression ')' event_control {
    }
  ;

disable_statement :
    KW_DISABLE hierarchical_task_identifier ';' {
    }
|   KW_DISABLE hierarchical_block_identifier ';' {
    }
  ;

event_control :
    '@' hierarchical_event_identifier {
    }
|   '@' '(' event_expression ')' {
    }
|   '@' '*' {
    }
|   '@' '(' '*' ')' {
    }
  ;

script_list :
     %empty   {
    }
| '['expression ']' {
    }
|script_list '['expression ']' {
    }
  ;

event_trigger :
    MINUSGT hierarchical_event_identifier script_list ';' {
    }
  ;

event_expression :
    expression {
    }
|   KW_POSEDGE expression {
    }
|   KW_NEGEDGE expression {
    }
|   event_expression KW_OR event_expression {
    }
|   event_expression ',' event_expression {
    }
  ;

procedural_timing_control :
    delay_control {
    }
|   event_control {
    }
  ;

procedural_timing_control_statement :
    procedural_timing_control statement_or_null {
    }
  ;

wait_statement :
    KW_WAIT '(' expression ')' statement_or_null {
    }
  ;

/*
A.6.6 Conditional statements
*/
conditional_statement :
    KW_IF '(' expression ')'
    statement_or_null KW_ELSE statement_or_null {
    }
|   KW_IF '(' expression ')'
    statement_or_null {
    }
|   if_else_if_statement {
    }
  ;

else_if_list:
     %empty   {
    } 
|   KW_ELSE KW_IF '(' expression ')' statement_or_null {
    }
|   else_if_list KW_ELSE KW_IF '(' expression ')' statement_or_null {
    }
  ;

if_else_if_statement :
    KW_IF '(' expression ')' statement_or_null
    else_if_list
    KW_ELSE statement_or_null {
    }
|   KW_IF '(' expression ')' statement_or_null
    else_if_list {
    }
  ;

/*
A.6.7 Case statements
*/
case_item_list :
    case_item {
    }
|   case_item_list case_item {
    }
  ;

case_type:
    KW_CASE {
    }
|   KW_CASEZ {
    }
|   KW_CASEX {
    }
  ;

case_statement :
    case_type '(' expression ')' case_item_list KW_ENDCASE {
    }
  ;

expression_list :
    expression {
    }
|   expression_list ',' expression {
    }
  ;

case_item :
    expression_list ':' statement_or_null {
    }
|   KW_DEFAULT ':' statement_or_null {
    }
|   KW_DEFAULT statement_or_null {
    }
  ;

/*
A.6.8 Looping statements
*/
loop_statement :
    KW_FOREVER statement {
    }
|   KW_REPEAT '(' expression ')' statement {
    }
|   KW_WHILE '(' expression ')' statement {    
    }
|   KW_FOR '(' variable_assignment ';' expression ';' variable_assignment ')' statement {
    }
  ;

/*
A.6.9 Task enable statements
*/
expression_or_null_list :
     %empty   {
    }
|   expression {
    }
|   expression_or_null_list ',' {
    }
|   expression_or_null_list ',' expression {
    }
  ;

system_task_enable : 
    SYSTEM_ID ';' {
    }
|   SYSTEM_ID '(' expression_or_null_list ')' ';' {
    }
  ;

task_enable : 
    hierarchical_task_identifier ';' {
    }
|   hierarchical_task_identifier '(' expression_list ')' ';' {
    }
  ;

/*
A.7 Specify section
A.7.1 Specify block declaration
*/
specify_item_list :
     %empty   {
    }
|   specify_item {
    }
|   specify_item_list specify_item {
    }
  ;

specify_block : 
    KW_SPECIFY specify_item_list KW_ENDSPECIFY {
    }
  ;

specify_item :
    specparam_declaration {
    }
|   pulsestyle_declaration {
    }
|   showcancelled_declaration {
    }
|   path_declaration {
    }
|   system_timing_check {
    }
  ;

pulsestyle_declaration :
    KW_PULSESTYLE_ONEVENT list_of_path_outputs ';' {
    }
|   KW_PULSESTYLE_ONDETECT list_of_path_outputs ';' {
    }
  ;

showcancelled_declaration :
    KW_SHOWCANCELLED list_of_path_outputs ';' {
    }
|   KW_NOSHOWCANCELLED list_of_path_outputs ';' {
    }
  ;

/*
A.7.2 Specify path declarations
*/
path_declaration :
    simple_path_declaration ';' {
    }
|   edge_sensitive_path_declaration ';' {
    }
|   state_dependent_path_declaration ';' {
    }
  ;

simple_path_declaration : 
    parallel_path_description '=' path_delay_value {
    }
|   full_path_description '=' path_delay_value {
    }
  ;

polarity_operator_option:
     %empty   {
    }
|   polarity_operator {
    }
  ;

parallel_path_description :
    '(' specify_input_terminal_descriptor polarity_operator_option EQGT specify_output_terminal_descriptor ')' {
    }
  ;

full_path_description :
    '(' list_of_path_inputs polarity_operator_option STARGT list_of_path_outputs ')' {
    }
  ;

list_of_path_inputs :
    specify_input_terminal_descriptor {
    } 
|   list_of_path_inputs ',' specify_input_terminal_descriptor {
    }
  ;

list_of_path_outputs :
    specify_output_terminal_descriptor {
    }
|   list_of_path_outputs ',' specify_output_terminal_descriptor {
    }
  ;

/*
A.7.3 Specify block terminals
*/
specify_input_terminal_descriptor :
    input_identifier {
    }
|   input_identifier '[' constant_range_expression ']' {
    }
  ;

specify_output_terminal_descriptor :
    output_identifier {
    }
|   output_identifier '[' constant_range_expression ']' {
    }
  ;

input_identifier : 
    input_port_identifier  {
    }
|   inout_port_identifier {
    }
  ;

output_identifier : 
    output_port_identifier  {
    }
|   inout_port_identifier {
    }
  ;

/*
A.7.4 Specify path delays
*/
path_delay_value :
    list_of_path_delay_expressions {
    }
|   '(' list_of_path_delay_expressions ')' {
    }
  ;

list_of_path_delay_expressions :
    t_path_delay_expression {
    }
|   trise_path_delay_expression ',' tfall_path_delay_expression {
    }
|   trise_path_delay_expression ',' tfall_path_delay_expression ',' tz_path_delay_expression {
    }
|   t01_path_delay_expression ',' t10_path_delay_expression ',' t0z_path_delay_expression ','
    tz1_path_delay_expression ',' t1z_path_delay_expression ',' tz0_path_delay_expression {
    }
|   t01_path_delay_expression ',' t10_path_delay_expression ',' t0z_path_delay_expression ','
    tz1_path_delay_expression ',' t1z_path_delay_expression ',' tz0_path_delay_expression ','
    t0x_path_delay_expression ',' tx1_path_delay_expression ',' t1x_path_delay_expression ','
    tx0_path_delay_expression ',' txz_path_delay_expression ',' tzx_path_delay_expression {
    }
  ;

t_path_delay_expression : 
    path_delay_expression {
    }
  ;

trise_path_delay_expression : 
	path_delay_expression {
	}
  ;

tfall_path_delay_expression : 
	path_delay_expression {
	}
  ;

tz_path_delay_expression : 
	path_delay_expression {
	}
  ;

t01_path_delay_expression : 
	path_delay_expression {
	}
  ;

t10_path_delay_expression : 
	path_delay_expression {
	}
  ;

t0z_path_delay_expression : 
	path_delay_expression {
	}
  ;

tz1_path_delay_expression : 
	path_delay_expression {
	}
  ;

t1z_path_delay_expression : 
	path_delay_expression {
	}
  ;

tz0_path_delay_expression : 
	path_delay_expression {
	}
  ;
t0x_path_delay_expression : 
	path_delay_expression {
	}
  ;

tx1_path_delay_expression : 
	path_delay_expression {
	}
  ;

t1x_path_delay_expression : 
	path_delay_expression {
	}
  ;
tx0_path_delay_expression : 
	path_delay_expression {
	}
  ;

txz_path_delay_expression : 
	path_delay_expression {
	}
  ;

tzx_path_delay_expression : 
	path_delay_expression {
	}
  ;

path_delay_expression : 
    constant_mintypmax_expression {
    }
  ;

edge_sensitive_path_declaration :
    parallel_edge_sensitive_path_description '=' path_delay_value {
    }
|   full_edge_sensitive_path_description '=' path_delay_value {
    }
  ;

edge_identifier_option :
     %empty   {
    }
|   edge_identifier {
    }
  ;

polarity_operator_option :
     %empty   {
    }
|   polarity_operator {
    }
  ;
parallel_edge_sensitive_path_description :
    '(' edge_identifier_option specify_input_terminal_descriptor EQGT 
    '(' specify_output_terminal_descriptor polarity_operator_option ':' data_source_expression ')' ')' {
    }
  ;

full_edge_sensitive_path_description :
    '(' edge_identifier_option list_of_path_inputs STARGT
    '(' list_of_path_outputs polarity_operator_option ':' data_source_expression ')' ')' {
    }
  ;

data_source_expression : 
    expression {
    }
  ;

edge_identifier : 
    KW_POSEDGE {
    }
|   KW_NEGEDGE {
    }
  ;

state_dependent_path_declaration :
    KW_IF '(' module_path_expression ')' simple_path_declaration {
    }
|   KW_IF '(' module_path_expression ')' edge_sensitive_path_declaration {
    }
|   KW_IFNONE simple_path_declaration {
    }
  ;

polarity_operator : 
    '+'  {
    }
|   '-' {
    }
  ;

/*
A.7.5 System timing checks
A.7.5.1 System timing check commands
*/

system_timing_check :
    setup_timing_check {
    }
|   hold_timing_check{
    }
|   setuphold_timing_check {
    }
|   recovery_timing_check {
    }
|   removal_timing_check {
    }
|   recrem_timing_check {
    }
|   skew_timing_check {
    }
|   timeskew_timing_check {
    }
|   fullskew_timing_check {
    }
|   period_timing_check {
    }
|   width_timing_check {
    }
|   nochange_timing_check {
    }
  ;

notifier_or_null :
    %empty    {
    }
|   ',' {
    }
|   ',' notifier {
    }
  ;

setup_timing_check :
    KW_SYS_SETUP '(' data_event ',' reference_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;

hold_timing_check :
    KW_SYS_HOLD '(' reference_event ',' data_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;

notifier_option :
     %empty  {
    }
|   notifier {
    }
  ;

stamptime_condition_option :
     %empty   {
    }
|   stamptime_condition {
    }
  ;

checktime_condition_option :
    %empty    {
    }
|   checktime_condition {
    }
  ;

delayed_reference_option :
     %empty   {
    }
|   delayed_reference {
    }
  ;

delayed_data_option :
    %empty    {
    }
|   delayed_data {
    }
  ;

setuphold_timing_check :
    KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ')' ';' {
    }
|   KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ')' ';' {
    }
|   KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ')' ';' {
    }
|   KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
     ')' ';' {
    }
|   KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
    ',' delayed_reference_option 
    ')' ';' {
    }
|   KW_SYS_SETUPHOLD '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
    ',' delayed_reference_option 
    ',' delayed_data_option
    ')' ';' {
    }
  ;

recovery_timing_check :
    KW_SYS_RECOVERY '(' reference_event ',' data_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;

removal_timing_check :
    KW_SYS_REMOVAL '(' reference_event ',' data_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;

recrem_timing_check :
    KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ')' ';' {
    }
|   KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option
    ')' ';' {
    }
|   KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option
    ')' ';' {
    }
|   KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
    ')' ';' {
    }
|   KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
    ',' delayed_reference_option
    ')' ';' {
    }
|   KW_SYS_RECREM '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option 
    ',' stamptime_condition_option 
    ',' checktime_condition_option
    ',' delayed_reference_option  
    ',' delayed_data_option
    ')' ';' {
    }
  ;

skew_timing_check :
    KW_SYS_SKEW '(' reference_event ',' data_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;

timeskew_timing_check :
    KW_SYS_TIMESKEW '(' reference_event ',' data_event ',' timing_check_limit
    ')' ';' {
    }
|   KW_SYS_TIMESKEW '(' reference_event ',' data_event ',' timing_check_limit
    ',' notifier_option 
    ')' ';' {
    }
|   KW_SYS_TIMESKEW '(' reference_event ',' data_event ',' timing_check_limit
    ',' notifier_option 
    ',' event_based_flag_option
    ')' ';' {
    }
|   KW_SYS_TIMESKEW '(' reference_event ',' data_event ',' timing_check_limit
    ',' notifier_option 
    ',' event_based_flag_option
    ',' remain_active_flag_option
    ')' ';' {
    }
  ;

event_based_flag_option :
     %empty   {
    }
|   event_based_flag {
    }
  ;

remain_active_flag_option :
     %empty   {
    }
|   remain_active_flag {
    }
  ;

threshold_option :
     %empty   {
    }
|   threshold {
    }
  ;

fullskew_timing_check :
    KW_SYS_FULLSKEW '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ')' ';' {
    }
|   KW_SYS_FULLSKEW '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option
    ')' ';' {
    }

|   KW_SYS_FULLSKEW '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option
    ',' event_based_flag_option
    ')' ';' {
    }
|   KW_SYS_FULLSKEW '(' reference_event ',' data_event ',' timing_check_limit ',' timing_check_limit
    ',' notifier_option
    ',' event_based_flag_option
    ',' remain_active_flag_option 
    ')' ';' {
    }
  ;

period_timing_check :
    KW_SYS_PERIOD '(' controlled_reference_event ',' timing_check_limit notifier_or_null ')' ';' {
    }
  ;


width_timing_check :
    KW_SYS_WIDTH '(' controlled_reference_event ',' timing_check_limit
    ')' ';' {
    }
|   KW_SYS_WIDTH '(' controlled_reference_event ',' timing_check_limit
    ',' threshold_option 
    ')' ';' {
    }
|   KW_SYS_WIDTH '(' controlled_reference_event ',' timing_check_limit
    ',' threshold_option 
    ',' notifier_option 
    ')' ';' {
    }
  ;

nochange_timing_check :
    KW_SYS_NOCHANGE '(' reference_event ',' data_event ',' start_edge_offset ','
    end_edge_offset notifier_or_null ')' ';' {
    }
  ;

/*
A.7.5.2 System timing check command arguments
*/

checktime_condition : 
    mintypmax_expression {
    }
  ;

controlled_reference_event : 
    controlled_timing_check_event {
    }
  ;

data_event : 
    timing_check_event {
    }
  ;

delayed_data :
    terminal_identifier {
    }
|   terminal_identifier '[' constant_mintypmax_expression ']' {
    }
  ;

delayed_reference :
    terminal_identifier {
    }
|   terminal_identifier '[' constant_mintypmax_expression ']' {
    }
  ;

end_edge_offset :
    mintypmax_expression {
    }
 ;

event_based_flag : 
    constant_expression {
    }
  ;

notifier : 
    variable_identifier {
    }
  ;

reference_event : 
    timing_check_event {
    }
  ;

remain_active_flag : 
    constant_expression {
    }
  ;

stamptime_condition : 
    mintypmax_expression {
    }
  ;

start_edge_offset : 
    mintypmax_expression {
    }
  ;

threshold : 
    constant_expression {
    }
  ;

timing_check_limit : 
    expression {
    }
  ;



/*
A.7.5.3 System timing check event definitions
*/

timing_check_event_control_option :
     %empty   {
    }
|   timing_check_event_control {
    }
  ;

timing_check_event :
    timing_check_event_control_option specify_terminal_descriptor {
    }
|   timing_check_event_control_option specify_terminal_descriptor T_AND timing_check_condition {
    }
  ;

controlled_timing_check_event :
    timing_check_event_control specify_terminal_descriptor {
    }
|   timing_check_event_control specify_terminal_descriptor T_AND timing_check_condition {
    }
  ;

timing_check_event_control :
    KW_POSEDGE {
    }
|   KW_NEGEDGE {
    }
|   edge_control_specifier {
    }
  ;

specify_terminal_descriptor :
    specify_input_terminal_descriptor {
    }
|   specify_output_terminal_descriptor {
    }
  ;

edge_descriptor_list:
      %empty  {
    }
| edge_descriptor {
    }
| edge_descriptor_list ',' edge_descriptor {
    }
  ;

edge_control_specifier : 
    KW_EDGE edge_descriptor_list {
    }
  ;

edge_descriptor :
    number {
    }
  ;

/*
fixed me
edge_descriptor :
    01 {
    }
|   10 {
    }
|   z_or_x zero_or_one {
    }
|   zero_or_one z_or_x {
    }
  ;

zero_or_one : 0 | 1
z_or_x ::= x | X | z | Z
*/

timing_check_condition :
    scalar_timing_check_condition {
    }
|   '(' scalar_timing_check_condition ')' {
    }
  ;

scalar_timing_check_condition :
    expression {
    }
|   '~' expression {
    }
|   expression L_EQ scalar_constant {
    }
|   expression C_EQ scalar_constant {
    }
|   expression L_NEQ scalar_constant {
    }
|   expression C_NEQ scalar_constant {
    }
  ;

scalar_constant :
    number {
    }
  ;
/*
fixedme
1'b0 | 1'b1 | 1'B0 | 1'B1 | 'b0 | 'b1 | 'B0 | 'B1 | 1 | 0
*/

/*
A.8 Expressions
A.8.1 Concatenations
*/
concatenation : 
    '{' expression_list '}' {
    }
  ;

constant_expression_list :
    constant_expression {
    }
|   constant_expression_list ',' constant_expression {
    }
  ;

constant_concatenation : 
    '{' constant_expression_list '}' {
    }
  ;

constant_multiple_concatenation : 
    '{' constant_expression constant_concatenation '}' {
    }
  ;

module_path_expression_list :
    module_path_expression {
    }
|   module_path_expression_list ',' module_path_expression {
    }
  ;


module_path_concatenation : 
    '{' module_path_expression_list '}' {
    }
  ;

module_path_multiple_concatenation : 
    '{' constant_expression module_path_concatenation '}' {
    }
  ;

multiple_concatenation : 
    '{' constant_expression concatenation '}' {
    }
  ;

/*
A.8.2 Function calls
*/
constant_function_call : 
    function_identifier attribute_instance_list
    '(' constant_expression_list ')' {
    }
  ;

system_function_identifier :
    SYSTEM_ID {
    }
  ;

constant_system_function_call : 
    system_function_identifier
    '(' constant_expression_list ')' {
    }
  ;

/*
function_call : 
    hierarchical_function_identifier attribute_instance_list
    '(' expression_list ')' {
    }
  ;
*/
function_call : 
    hierarchical_identifier attribute_instance_list
    '(' expression_list ')' {
    }
  ;


system_function_call : 
    system_function_identifier {
    }
|   system_function_identifier
    '(' expression_list ')' {
    }
  ;

/*
A.8.3 Expressions
*/
base_expression : 
    expression {
        $$ = $1;
    }
  ;

conditional_expression : 
    expression '?' attribute_instance_list expression ':' expression {
        $$ = verilogparseCreateIfopExpr(
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $6, //HOBJECT expr2,
        $3 //IDListVarPtr attributes
        );
    }
  ;

constant_base_expression : 
    constant_expression {
    $$ = $1;
    }
  ;

unary_constant_expression :
    constant_primary {
        $$ = $1;
    }
|   unary_operator attribute_instance_list unary_constant_expression { 
    /*规范中是unary_operator attribute_instance_list primary, 似乎有点不大对啊 */
    $$ = verilogparseCreateUnopConstantExpr(
         $1,//int op,
         $3,//HOBJECT expr,
         $2 //IDListVarPtr attributes
        );
    }
 ;

pow_constant_expression :
    unary_constant_expression {
        $$ = $1;
    }
|  pow_constant_expression POW attribute_instance_list unary_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_POW, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
 ;

multiplicative_constant_expression :
    pow_constant_expression {
        $$ = $1;
    }
|  multiplicative_constant_expression '*' attribute_instance_list pow_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_MUL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  multiplicative_constant_expression '/' attribute_instance_list pow_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_DIV, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  multiplicative_constant_expression '%' attribute_instance_list pow_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_MOD, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;


additive_constant_expression :
    multiplicative_constant_expression {
        $$ = $1;
    }
|  additive_constant_expression '+' attribute_instance_list multiplicative_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_PLUS, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  additive_constant_expression '-' attribute_instance_list multiplicative_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_MINUS, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;

shift_constant_expression :
    additive_constant_expression {
        $$ = $1;
    }
|  shift_constant_expression LSL attribute_instance_list additive_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_LSL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_constant_expression LSR attribute_instance_list additive_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_LSR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_constant_expression ASL attribute_instance_list additive_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_ASL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_constant_expression ASR attribute_instance_list additive_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_ASR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

relational_constant_expression :
    shift_constant_expression {
        $$ = $1;
    }
|  relational_constant_expression '>' attribute_instance_list shift_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_GT, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_constant_expression '<' attribute_instance_list shift_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_LT, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_constant_expression GTE attribute_instance_list shift_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_GTE, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_constant_expression LTE attribute_instance_list shift_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_LTE, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

equality_constant_expression :
    relational_constant_expression {
        $$ = $1;
    }
|  equality_constant_expression L_EQ attribute_instance_list relational_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_L_EQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_constant_expression C_EQ attribute_instance_list relational_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_C_EQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_constant_expression L_NEQ attribute_instance_list relational_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_L_NEQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_constant_expression C_NEQ attribute_instance_list relational_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_C_NEQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

and_constant_expression :
    equality_constant_expression {
        $$ = $1;
    }
|  and_constant_expression '&' attribute_instance_list equality_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_AND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  and_constant_expression B_NAND attribute_instance_list equality_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_NAND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;


exclusive_or_constant_expression :
    and_constant_expression {
        $$ = $1;
    }
|  exclusive_or_constant_expression '^' attribute_instance_list and_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_XOR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  exclusive_or_constant_expression B_EQU attribute_instance_list and_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_EQU, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;


inclusive_or_constant_expression :
    exclusive_or_constant_expression {
        $$ = $1;
    }
|  inclusive_or_constant_expression '|' attribute_instance_list exclusive_or_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_OR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  inclusive_or_constant_expression B_NOR attribute_instance_list exclusive_or_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_B_NOR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

logical_and_constant_expression :
    inclusive_or_constant_expression {
        $$ = $1;
    }
|  logical_and_constant_expression L_AND attribute_instance_list inclusive_or_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_L_AND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

logical_or_constant_expression :
    logical_and_constant_expression {
        $$ = $1;
    }
|   logical_or_constant_expression L_OR attribute_instance_list logical_and_constant_expression {
    $$ = verilogparseCreateBinopConstantExpr(
        OP_L_OR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;

constant_expression : 
    logical_or_constant_expression {
        $$ = $1;
    }
| constant_expression '?' attribute_instance_list constant_expression ':' constant_expression {
    $$ = verilogparseCreateIfopConstantExpr(
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $6, //HOBJECT expr2,
        $3 //IDListVarPtr attributes
        );
    }

   ;

/*
constant_expression :
    constant_primary {
    $$ = $1;
    }
|   unary_operator attribute_instance_list constant_primary {
    $$ = verilogparseCreateUnopExpr(
         $1,//int op,
         $3,//HOBJECT expr,
         $2 //IDListVarPtr attributes
        );
    }
|   constant_expression binary_operator attribute_instance_list constant_expression {
    $$ = verilogparseCreateBinopExpr(
        $2, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|   constant_expression '?' attribute_instance_list constant_expression ':' constant_expression {
    $$ = verilogparseCreateIfopExpr(
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $6, //HOBJECT expr2,
        $3 //IDListVarPtr attributes
        );
    }
  ;
*/

constant_mintypmax_expression :
    constant_expression {
    $$ = $1;
    }
|   constant_expression ':' constant_expression ':' constant_expression {
    $$ = $1;
    }
  ;

constant_range_expression :
    constant_expression {
    $$.type = RANGE_TYPE_BITSELECT;
    $$.obj[0] = $1;
    $$.obj[1] = NULL;
    }
|   msb_constant_expression ':' lsb_constant_expression {
    $$.type = RANGE_TYPE_PARTSELECT;
    $$.obj[0] = $1;
    $$.obj[1] = $3;
    }
|   constant_base_expression STARTPLUSWIDTH width_constant_expression {
    $$.type = RANGE_TYPE_STARTPLUSWIDTH;
    $$.obj[0] = $1;
    $$.obj[1] = $3;
    }
|   constant_base_expression STARTMINUSWIDTH width_constant_expression {
    $$.type = RANGE_TYPE_STARTMINUSWIDTH;
    $$.obj[0] = $1;
    $$.obj[1] = $3;
    }
  ;

dimension_constant_expression :
    constant_expression {
     $$ = $1;
    }
  ;

unary_expression :
    primary {
        $$ = $1;
    }
|   unary_operator attribute_instance_list unary_expression { 
    /*规范中是unary_operator attribute_instance_list primary, 似乎有点不大对啊 */
    $$ = verilogparseCreateUnopExpr(
         $1,//int op,
         $3,//HOBJECT expr,
         $2 //IDListVarPtr attributes
        );
    }
 ;

pow_expression :
    unary_expression {
        $$ = $1;
    }
|  pow_expression POW attribute_instance_list unary_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_POW, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
 ;

multiplicative_expression :
    pow_expression {
        $$ = $1;
    }
|  multiplicative_expression '*' attribute_instance_list pow_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_MUL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  multiplicative_expression '/' attribute_instance_list pow_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_DIV, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  multiplicative_expression '%' attribute_instance_list pow_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_MOD, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;


additive_expression :
    multiplicative_expression {
        $$ = $1;
    }
|  additive_expression '+' attribute_instance_list multiplicative_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_PLUS, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  additive_expression '-' attribute_instance_list multiplicative_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_MINUS, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;

shift_expression :
    additive_expression {
        $$ = $1;
    }
|  shift_expression LSL attribute_instance_list additive_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_LSL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_expression LSR attribute_instance_list additive_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_LSR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_expression ASL attribute_instance_list additive_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_ASL, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  shift_expression ASR attribute_instance_list additive_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_ASR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

relational_expression :
    shift_expression {
        $$ = $1;
    }
|  relational_expression '>' attribute_instance_list shift_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_GT, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_expression '<' attribute_instance_list shift_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_LT, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_expression GTE attribute_instance_list shift_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_GTE, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  relational_expression LTE attribute_instance_list shift_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_LTE, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

equality_expression :
    relational_expression {
        $$ = $1;
    }
|  equality_expression L_EQ attribute_instance_list relational_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_L_EQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_expression C_EQ attribute_instance_list relational_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_C_EQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_expression L_NEQ attribute_instance_list relational_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_L_NEQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  equality_expression C_NEQ attribute_instance_list relational_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_C_NEQ, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

and_expression :
    equality_expression {
        $$ = $1;
    }
|  and_expression '&' attribute_instance_list equality_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_AND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  and_expression B_NAND attribute_instance_list equality_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_NAND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;


exclusive_or_expression :
    and_expression {
        $$ = $1;
    }
|  exclusive_or_expression '^' attribute_instance_list and_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_XOR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  exclusive_or_expression B_EQU attribute_instance_list and_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_EQU, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;


inclusive_or_expression :
    exclusive_or_expression {
        $$ = $1;
    }
|  inclusive_or_expression '|' attribute_instance_list exclusive_or_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_OR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|  inclusive_or_expression B_NOR attribute_instance_list exclusive_or_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_B_NOR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

logical_and_expression :
    inclusive_or_expression {
        $$ = $1;
    }
|  logical_and_expression L_AND attribute_instance_list inclusive_or_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_L_AND, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
  ;

logical_or_expression :
    logical_and_expression {
        $$ = $1;
    }
|   logical_or_expression L_OR attribute_instance_list logical_and_expression {
    $$ = verilogparseCreateBinopExpr(
        OP_L_OR, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
    ;

expression : 
    logical_or_expression {
        $$ = $1;
    }
|   conditional_expression {
        $$ = $1;
    }
   ;
/*
expression :
    primary {
    $$ = $1;
    }
|   unary_operator attribute_instance_list primary {
    $$ = verilogparseCreateUnopExpr(
         $1,//int op,
         $3,//HOBJECT expr,
         $2 //IDListVarPtr attributes
        );
    }
|   expression binary_operator attribute_instance_list expression {
    $$ = verilogparseCreateBinopExpr(
        $2, //int op,
        $1, //HOBJECT expr0,
        $4, //HOBJECT expr1,
        $3  //IDListVarPtr attributes
        );
    }
|   conditional_expression {
    $$ = $1;
    }
  ;
*/

/*
expression1 ::= expression
expression2 ::= expression
expression3 ::= expression
*/

lsb_constant_expression : 
    constant_expression {
      $$ = $1;
    }
  ;

mintypmax_expression :
    expression {
      $$.objcount = 1;
      $$.obj[0] = $1;
    }
|   expression ':' expression ':' expression {
      $$.objcount = 3;
      $$.obj[0] = $1;
      $$.obj[1] = $3;
      $$.obj[2] = $5;
    }
  ;

module_path_conditional_expression : 
    module_path_expression '?' attribute_instance_list
    module_path_expression ':' module_path_expression {
    }
  ;

module_path_expression :
    module_path_primary {
    }
|   unary_module_path_operator attribute_instance_list module_path_primary {
    }
|   module_path_expression binary_module_path_operator 
    attribute_instance_list module_path_expression {
    }
|   module_path_conditional_expression {
    }
  ;

module_path_mintypmax_expression :
    module_path_expression {
    }
|   module_path_expression ':' module_path_expression ':' module_path_expression {
    }
  ;

msb_constant_expression : 
    constant_expression {
        $$ = $1;
    }
  ;

range_expression :
    expression {
    }
|   constant_expression ':' lsb_constant_expression {
    }
|   expression STARTPLUSWIDTH width_constant_expression {
    }
|   expression STARTMINUSWIDTH width_constant_expression {
    }
  ;

width_constant_expression : 
    constant_expression {
    $$ = $1;
    }
  ;

/*
A.8.4 Primaries
*/
constant_primary :
    number {
        $$ = verilogparseCreateValueExpr(
            EXPRTYPE_NUMBER, //int exprtype,
            $1, //IConstStringVar* value,
            NULL //IDListVarPtr attributes
        );
    }
|   parameter_identifier {
        $$ = verilogparseCreateParamExpr(
            EXPRTYPE_PARAM, //int exprtype,
            $1, //IConstStringVar* name,
            RANGE_TYPE_NONE, //int range_type,
            NULL, //HOBJECT range_msb,
            NULL, //HOBJECT range_lsb,
            NULL //IDListVarPtr attributes
        );
    }
|   parameter_identifier '[' constant_range_expression ']' {
        $$ = verilogparseCreateParamExpr(
            EXPRTYPE_PARAM, //int exprtype,
            $1, //IConstStringVar* name,
            $3.type, //int range_type,
            $3.obj[0], //HOBJECT range_msb,
            $3.obj[1], //HOBJECT range_lsb,
            NULL //IDListVarPtr attributes
        );
    }
|   specparam_identifier  {
        $$ = NULL;
    }
|   specparam_identifier '[' constant_range_expression ']' {
        $$ = NULL;
    }
|   constant_concatenation {
        $$ = NULL;
    }
|   constant_multiple_concatenation {
        $$ = NULL;
    }
|   constant_function_call {
        $$ = NULL;
    }
|   constant_system_function_call {
        $$ = NULL;
    }
|   '(' constant_mintypmax_expression ')' {
        $$ = $2;
    }
|   string {
        $$ = verilogparseCreateValueExpr(
            EXPRTYPE_STRING, //int exprtype,
            $1, //IConstStringVar* value,
            NULL //IDListVarPtr attributes
        );
    }
  ;

module_path_primary :
    number {
    }
|   identifier {
    }
|   module_path_concatenation {
    }
|   module_path_multiple_concatenation {
    }
|   function_call {
    }
|   system_function_call {
    }
|   '(' module_path_mintypmax_expression ')' {
    }
  ;

array_element_select :
     %empty   {
    }
|   '[' expression ']' {
    }
|   array_element_select '[' expression ']' {
    }
  ;

range_expression_option :
      %empty  {
    }
| '[' range_expression ']' {
    }
  ;

range_expression_list :
      %empty  {
    }
| '[' range_expression ']' {
    }
| range_expression_list '[' range_expression ']' {
     /*
     此时要判断前面的作为array_element_select只能由一个表达式组成，
     不能是两个表达式表示的段选择
     */
    }
  ;

/*
  不满足LALR(1)的文法，只能够由后期判断了
|   hierarchical_identifier array_element_select range_expression_option {
    }

    hierachical_header:
    identifier '.' {
    }
|   identifier '[' constant_expression ']' '.' {
    }
|   hierachical_header identifier '.' {
    }
|   hierachical_header identifier '[' constant_expression ']' '.' {
    }
 ;
    
hierarchical_identifier : 
  hierachical_header identifier {
  }
| identifier {
  }
 ;
*/

hierarchical_identifier_part :
    identifier {
    $$ = verilogparseCreateVarSel(
        $1, //const char * name,
        RANGE_TYPE_NONE, //int range_type,
        NULL, //HOBJECT range_msb,
        NULL  //HOBJECT range_lsb
       );
    }
|   identifier '[' expression ']' {
    $$ = verilogparseCreateVarSel(
        $1, //const char * name,
        RANGE_TYPE_BITSELECT, //int range_type,
        $3,  // HOBJECT range_msb,
        NULL //HOBJECT range_lsb
       );
    }
|   identifier '[' expression ':' expression ']' {
    $$ = verilogparseCreateVarSel(
        $1, //const char * name,
        RANGE_TYPE_PARTSELECT, //int range_type,
        $3,  // HOBJECT range_msb,
        $5   //HOBJECT range_lsb
       );
    }
|   identifier '[' expression STARTPLUSWIDTH expression ']' {
    $$ = verilogparseCreateVarSel(
        $1, //const char * name,
        RANGE_TYPE_STARTPLUSWIDTH, //int range_type,
        $3,  // HOBJECT range_msb,
        $5   //HOBJECT range_lsb
       );
    }
|   identifier '[' expression STARTMINUSWIDTH expression ']' {
    $$ = verilogparseCreateVarSel(
        $1, //const char * name,
        RANGE_TYPE_STARTMINUSWIDTH, //int range_type,
        $3,  // HOBJECT range_msb,
        $5   //HOBJECT range_lsb
       );
    }
  ;

var :
  hierarchical_identifier {
    $$.type = RANGE_TYPE_NONE;
    $$.obj[0] = $1;
    $$.obj[1] = dlistCreate();
  }
|  var '[' expression ']' {
    $$ = $1;
    $$.type = RANGE_TYPE_BITSELECT;
    dlistAppendItem($$.obj[1], $3);
    dlistAppendItem($$.obj[1], $3);
  }
|  var '[' expression ':' expression ']' {
    $$ = $1;
    $$.type = RANGE_TYPE_PARTSELECT; /*只记录最后一次的类型，反正这种情况只有最后一次才会出现*/
    dlistAppendItem($$.obj[1], $3);
    dlistAppendItem($$.obj[1], $5);
    }
|  var '[' expression STARTPLUSWIDTH expression ']' {
    $$ = $1;
    $$.type = RANGE_TYPE_STARTPLUSWIDTH;
    dlistAppendItem($$.obj[1], $3);
    dlistAppendItem($$.obj[1], $5);
    }
|  var '[' expression STARTMINUSWIDTH expression ']' {
    $$ = $1;
    $$.type = RANGE_TYPE_STARTMINUSWIDTH;
    dlistAppendItem($$.obj[1], $3);
    dlistAppendItem($$.obj[1], $5);
    }
  ;

hierarchical_identifier :
    hierarchical_identifier_part {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
|   hierarchical_identifier '.' hierarchical_identifier_part {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
  ;

/*
    hierarchical_identifier array_element_select range_expression_option
*/

primary :
    number {
        $$ = verilogparseCreateValueExpr(
            EXPRTYPE_NUMBER, //int exprtype,
            $1, //IConstStringVar* value,
            NULL //IDListVarPtr attributes
        );
    }
|   var {
        $$ = verilogparseCreateVariableExpr(
            EXPRTYPE_HIERARCHICAL_IDENT,
            $1.obj[0], //IDListVarPtr hierarchical_identifier,
            $1.obj[1], //IDListVarPtr elementselect,
            $1.type, //int range_type,
            NULL, //HOBJECT range_msb,
            NULL, //HOBJECT range_lsb,
            NULL //IDListVarPtr attributes
        );
    }
|   concatenation {
    $$ = NULL;
    yyerror("no support for concatenation");
    }
|   multiple_concatenation {
    $$ = NULL;
    yyerror("no support for multiple_concatenation");
    }

|   function_call{ 
    $$ = NULL;
    yyerror("no support for function_call");
    }
|   system_function_call {
    $$ = NULL;
    yyerror("no support for system_function_call");
    }

|   '(' mintypmax_expression ')' {
    $$ = $2.obj[0];
    if ($2.objcount > 1) {
        yyerror("no supprot for mintypmax_expression when objcount > 1");
    }
    }
|   string {
        $$ = verilogparseCreateValueExpr(
            EXPRTYPE_STRING, //int exprtype,
            $1, //IConstStringVar* value,
            NULL //IDListVarPtr attributes
        );
    }
  ;

/*
A.8.5 Expression left-side values
*/
const_array_element_select :
     %empty   {
    }
|   '[' constant_expression ']' {
    }
|   const_array_element_select '[' constant_expression ']' {
    }
  ;

constant_range_expression_option :
     %empty   {
    }
| range_expression {
    }
  ;

net_lvalue_list :
    net_lvalue {
    }
|   net_lvalue_list ',' net_lvalue {
    }
  ;

net_lvalue :
    hierarchical_net_identifier const_array_element_select constant_range_expression_option {
    }
|   '{' net_lvalue_list '}' {
    }
  ;

variable_lvalue_list :
    variable_lvalue {
    }
|   variable_lvalue_list ',' variable_lvalue {
    }
  ;

variable_lvalue :
    hierarchical_variable_identifier array_element_select range_expression_option {
    }
|   '{' variable_lvalue_list '}' {
    }
  ;

/*
A.8.6 Operators
*/

unary_operator :
    '+'  {
    $$ = OP_PLUS;
    }
|   '-'  {
    $$ = OP_MINUS;
    }
|   '!'  {
    $$ = OP_L_NOT;
    }
|   '~'  {
    $$ = OP_B_NOT;
    }
|   '&'  {
    $$ = OP_B_AND;
    }
|   B_NAND {
    $$ = OP_B_NAND;
    } 
|   '|' {
    $$ = OP_B_OR;
    } 
|   B_NOR {
    $$ = OP_B_NOR;
    } 
|   '^' {
    $$ = OP_B_XOR;
    } 
|   B_EQU  {
    $$ = OP_B_EQU;
    }
  ;

binary_operator :
    '+' {
    $$ = OP_PLUS;
    }
|   '-' {
    $$ = OP_MINUS;
    }
|   '*'  {
    $$ = OP_MUL;
    }
|   '/' {
    $$ = OP_DIV;
    } 
|   '%' {
    $$ = OP_MOD;
    } 
|   L_EQ {
    $$ = OP_L_EQ;
    }
|   L_NEQ {
    $$ = OP_L_NEQ;
    }
|   C_EQ {
    $$ = OP_C_EQ;
    } 
|   C_NEQ {
    $$ = OP_C_NEQ;
    } 
|   L_AND  {
    $$ = OP_L_AND;
    }
|   L_OR  {
    $$ = OP_L_OR;
    }
|   POW {
    $$ = OP_POW;
    }
|   '<' {
    $$ = OP_LT;
    } 
|   LTE  {
    $$ = OP_LTE;
    }
|   '>' {
    $$ = OP_GT;
    } 
|   GTE  {
    $$ = OP_GTE;
    }
|   '&' {
    $$ = OP_B_AND;
    } 
|   '|' {
    $$ = OP_B_OR;
    } 
|   '^' {
    $$ = OP_B_XOR;
    } 
|   B_EQU {
    $$ = OP_B_EQU;
    }
|   LSR  {
    $$ = OP_LSR;
    }
|   LSL  {
    $$ = OP_LSL;
    }
|   ASR {
    $$ = OP_ASR;
    } 
|   ASL {
    $$ = OP_ASL;
    }
  ;

unary_module_path_operator :
    '!'  {
    $$ = OP_L_NOT;
    }
|   '~'  {
    $$ = OP_B_NOT;
    }
|   '&'  {
    $$ = OP_B_AND;
    }
|   B_NAND  {
    $$ = OP_B_NAND;
    }
|   '|'  {
    $$ = OP_B_OR;
    }
|   B_NOR  {
    $$ = OP_B_NOR;
    }
|   '^'  {
    $$ = OP_B_XOR;
    }
|   B_EQU  {
    $$ = OP_B_EQU;
    }
  ;

binary_module_path_operator :
    L_EQ  {
    $$ = OP_L_EQ;
    }
|   L_NEQ {
    $$ = OP_L_NEQ;
    } 
|   L_AND {
    $$ = OP_L_AND;
    } 
|   L_OR {
    $$ = OP_L_OR;
    } 
|   '&' {
    $$ = OP_B_AND;
    }
|   '|'  {
    $$ = OP_B_OR;
    }
|   '^'  {
    $$ = OP_B_XOR;
    }
|   B_EQU  {
    $$ = OP_B_EQU;
    }
 ;

/*
A.8.7 Numbers
*/
/*
number ::=
decimal_number
| octal_number
| binary_number
| hex_number
| real_number
real_number ::=
unsigned_number . unsigned_number
| unsigned_number [ . unsigned_number ] exp [ sign ] unsigned_number
exp ::= e | E
decimal_number ::=
unsigned_number
| [ size ] decimal_base unsigned_number
| [ size ] decimal_base x_digit { _ }
| [ size ] decimal_base z_digit { _ }
binary_number ::= [ size ] binary_base binary_value
octal_number ::= [ size ] octal_base octal_value
hex_number ::= [ size ] hex_base hex_value
sign ::= + | -
size ::= non_zero_unsigned_number
non_zero_unsigned_number2 ::= non_zero_decimal_digit { _ | decimal_digit}
unsigned_number2 ::= decimal_digit { _ | decimal_digit }
binary_value2 ::= binary_digit { _ | binary_digit }
octal_value2 ::= octal_digit { _ | octal_digit }
hex_value2 ::= hex_digit { _ | hex_digit }
decimal_base2 ::= '[s|S]d | '[s|S]D
binary_base2 ::= '[s|S]b | '[s|S]B
octal_base2 ::= '[s|S]o | '[s|S]O
hex_base2 ::= '[s|S]h | '[s|S]H
non_zero_decimal_digit ::= 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
decimal_digit ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
binary_digit ::= x_digit | z_digit | 0 | 1
octal_digit ::= x_digit | z_digit | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
hex_digit ::=
x_digit | z_digit | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| a | b | c | d | e | f | A | B | C | D | E | F
x_digit ::= x | X
z_digit ::= z | Z | ?
*/

unsigned_number :
  UNSIGNED_NUMBER {
  $$ = $1;
  }
;

number :
    NUM_REAL{
    $$ = $1;
    }
|   unsigned_number {
    $$ = $1;
    }
|   BIN_BASE BIN_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        objectRelease($2);
    }
|   HEX_BASE HEX_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        objectRelease($2);
    }
|   OCT_BASE OCT_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        objectRelease($2);
    }
|   DEC_BASE DEC_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        objectRelease($2);
    }
|   UNSIGNED_NUMBER BIN_BASE BIN_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        hdl4seConstStringAppend($$, conststringFromVar($3));
        objectRelease($2);
        objectRelease($3);
    }
|   UNSIGNED_NUMBER HEX_BASE HEX_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        hdl4seConstStringAppend($$, conststringFromVar($3));
        objectRelease($2);
        objectRelease($3);
    }
|   UNSIGNED_NUMBER OCT_BASE OCT_VALUE {
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        hdl4seConstStringAppend($$, conststringFromVar($3));
        objectRelease($2);
        objectRelease($3);
    }
|   UNSIGNED_NUMBER DEC_BASE DEC_VALUE{
        $$ = $1;
        hdl4seConstStringAppend($$, conststringFromVar($2));
        hdl4seConstStringAppend($$, conststringFromVar($3));
        objectRelease($2);
        objectRelease($3);
    }
;


/*
A.8.8 Strings
*/
string : 
    STRING {
    $$ = $1;
    }
  ;

/* string ::= " { Any_ASCII_Characters_except_new_line } " */
/*
A.9 General
A.9.1 Attributes
*/
attribute_instance_list :
     %empty   {
        $$ = dlistCreate();
    }
|   attribute_instance_list attribute_instance {
    $$ = $1;
    dlistConcat($$, $2);
    }
|   attribute_instance {
        $$ = $1;
    }
 ;

attribute_instance : 
    ATTRIBUTE_START attribute_instance_spec_list ATTRIBUTE_END {
    $$ = $2;
    }
 ;
attribute_instance_spec_list : 
    attribute_instance_spec_list ',' attr_spec {
    $$ = $1;
    dlistAppendItem($$, $3);
    }
|   attr_spec {
    $$ = dlistCreate();
    dlistAppendItem($$, $1);
    }
 ;

attr_spec :
    attr_name {
    $$ = verilogparseCreateAttrSpec($1, NULL);
    objectRelease($1);
    }
|   attr_name  '=' constant_expression {
    $$ = verilogparseCreateAttrSpec($1, $3);
    objectRelease($1);
    objectRelease($3);
    }
  ;

attr_name : 
    identifier {
        $$ = $1;
    }
 ;
/*
A.9.2 Comments
*/

/*
comment ::=
one_line_comment
| block_comment
one_line_comment ::= // comment_text \n
block_comment ::= / * comment_text * /
comment_text ::= { Any_ASCII_character }
*/

/*
A.9.3 Identifiers
*/

block_identifier : 
    identifier {
    }
 ;

cell_identifier : 
    identifier {
    }
  ;

config_identifier :
    identifier {
    }
  ;

event_identifier : 
    identifier  {
    }
 ;

function_identifier :  
    identifier {
    }
 ;

gate_instance_identifier : 
    identifier  {
    }
 ;

generate_block_identifier : 
    identifier {
    }
 ;

genvar_identifier : 
    identifier {
    }
 ;

hierarchical_block_identifier : 
    hierarchical_identifier {
    }
  ;

hierarchical_event_identifier : 
    hierarchical_identifier {
    }
  ;

hierarchical_function_identifier : 
    hierarchical_identifier {
    }
  ;

/*
hierachical_header:
    identifier '.' {
    }
|   identifier '[' constant_expression ']' '.' {
    }
|   hierachical_header identifier '.' {
    }
|   hierachical_header identifier '[' constant_expression ']' '.' {
    }
 ;
    
hierarchical_identifier : 
  hierachical_header identifier {
  }
| identifier {
  }
 ;
*/

hierarchical_net_identifier : 
    hierarchical_identifier {
    }
 ;

hierarchical_parameter_identifier : 
    hierarchical_identifier {
    }
  ;

hierarchical_variable_identifier : 
    hierarchical_identifier {
    }
  ;

hierarchical_task_identifier : 
    hierarchical_identifier {
    }
  ;

identifier :
    SIMPLE_ID {
        $$ = $1;
    }
|   ESCAPED_ID {
        $$ = $1;
    }
  ;

inout_port_identifier : 
    identifier {
    }
  ;

input_port_identifier : 
    identifier {
    }
  ;

instance_identifier : 
    identifier {
    }
  ;

library_identifier : 
    identifier {
    }
  ;

module_identifier : 
    identifier {
    $$ = $1;
    }
  ;

module_instance_identifier : 
    identifier {
    $$ = $1;
    }
 ;
net_identifier : identifier {
    $$ = $1;
    }
  ;

output_port_identifier : 
    identifier {
    }
  ;

parameter_identifier : 
    identifier {
      $$ = $1;
    }
  ;

port_identifier : 
    identifier {
    $$ = $1;
    }
  ;

real_identifier : 
    identifier {
    }
  ;

specparam_identifier : 
    identifier {
    }
  ;

task_identifier : 
    identifier {
    }
  ;

terminal_identifier : 
    identifier {
    }
  ;

/* handle by preprocess
text_macro_identifier : 
    identifier {
    }
  ;
*/

topmodule_identifier : 
    identifier {
    $$ = $1;
    }
  ;

udp_identifier : 
    identifier {
    }
  ;

udp_instance_identifier : 
    identifier {
    }
  ;
variable_identifier : 
    identifier {
    }
  ;

/*
A.9.4 White space
*/
/*
white_space : 
    space  {
    }
|   tab {
    }
|   newline {
    }
|   eof {
    }
  ;
*/
%%