grammernodeclass.h

snl语言的语法分析 （递归下降法）词法分析

#ifndef _GCN_H
#define _GCN_H
#include"Scanner.h"

enum Nodekind
{
	ProK,PheadK,TypeK,VarK,ProcDecK,

	StmLK,DecK,StmtK,ExpK
};

enum NodeType
{
	ArrayK,CharK,IntegerK,RecordK,IdK,

	IfK,WhileK,AssignK,ReadK,WriteK,CallK,ReturnK,

	OpK,ConstK
};



enum Op
{
	LT,EQ,PLUS,MINUS,
		TIMES,OVER
};



enum VarKind
{
	IdV,ArrayMembV,FieldMembV    
		

};


enum ExpType
{
	Void,Integer,Boolean
};



enum paramtype
{
	valparamtype,varparamtype
};



union kind
{
	NodeType dec,stmt,exp;
};


struct attr;           

struct ArrayAttr;      

struct ProcAttr;       

struct ExpAttr;        




struct NameNode
{
	string str_name;
	NameNode * NN_next;
};





struct ArrayAttr
{
	int i_low;
	int i_up;
	string childType;
};
struct ProcAttr
{
	paramtype PT_param;
};
struct ExpAttr
{
	Op O_op;
	int val;
	VarKind VK_varkind;
	ExpType ET_type;
};

struct attr
{
	ArrayAttr Array;
	ProcAttr Proc;
	ExpAttr Exp;
};

struct GrammerNode
{
	GrammerNode * child0;
	GrammerNode * child1;
	GrammerNode * child2;
	GrammerNode * Sibling;
	int i_Lineno;
	Nodekind NK_Nodekind;
	kind K_kind;
	int i_idnum;
	NameNode * name; 
	


	string str_type_name;
	attr at_attr;
};
#endif