C++ Precept和NV类的封装,请看下面考试大为您收集的代码：
1 #pragma once
2 #include "..StringNWString.h"
3 #include "..AutoPtrAutoPtr.h"
4 #include "..CommonList.h"
5
6 #define Type_Match_Content 0 // 匹配值
7 #define Type_Match_Rule 1 // 匹配一条表达式
8 #define Type_Or -1
9 #define Type_Choose -2
10 #define Type_Loop_0 -3
11 #define Type_Loop_1 -4
12 #define Type_Opt -5
13 #define Type_LQ -6
14 #define Type_RQ -7
15
16 class Precept
17 {
18 public:
19 int Left;
20 List Right;
21
22 Precept() : Left(0){}
23 Precept(int L,List R) : Left(L),Right(R){}
24
25 // +Precept
26 friend NAutoPtr operator+(NAutoPtr P)
27 {
28 NAutoPtr p = new Precept;
29 p->Right.Add(Type_Loop_1);
30 p->Right.Add(Type_LQ);
31 p->Right.Add(P->Right);
32 p->Right.Add(Type_RQ);
33 return p;
34 }
35
36 // Precept + Precept
37 friend NAutoPtr operator+(NAutoPtr P1,NAutoPtr P2)
38 {
39 NAutoPtr p = new Precept;
40 p->Right.Add(P1->Right);
41 p->Right.Add(P2->Right);
42 return p;
43 }
44
45 // *Precept
46 friend NAutoPtr operator*(NAutoPtr P)
47 {
48 NAutoPtr p = new Precept;
49 p->Right.Add(Type_Loop_0);
50 p->Right.Add(Type_LQ);
51 p->Right.Add(P->Right);
52 p->Right.Add(Type_RQ);
53 return p;
54 }
55
56 // Precept | Precept
57 friend NAutoPtr operator|(NAutoPtr P1,NAutoPtr P2)
58 {
59 NAutoPtr p = new Precept;
60 p->Right.Add(Type_LQ);
61 p->Right.Add(P1->Right);
62 p->Right.Add(Type_RQ);
63 p->Right.Add(Type_Or);
64 p->Right.Add(Type_LQ);
65 p->Right.Add(P2->Right);
66 p->Right.Add(Type_RQ);
67 return p;
68 }
69 };
70
71 class NV
72 {
73 public:
74 NWString