为了让宿主程序可以更加清楚一份Kernel FP代码的内容，我今天为Kernel FP添加了反射的API。
Kernel FP的脚本引擎分为VL_KfpSymbol和VL_KfpMachine。其中VL_KfpSymbol负责编译代码和构造VL_KfpMachine。VL_KfpMachine的运行可以脱离VL_KfpSymbol，VL_KfpSymbol再次添加代码并编译的时候，构造的VL_KfpMachine并不受到影响。先前VL_KfpMachine已经有了小部分反射，主要用于枚举各种对象的运行时ID。这次VL_KfpSymbol的反射则是用于查看已经添加的代码的结构。
反射API如下：
1 /*********************************************************************************************************
2 反射
3 *********************************************************************************************************/
4
5 class VL_KfpAsmDecl : public VL_Base
6 {
7 public:
8 virtual VUnicodeString GetName()=0;
9 virtual VUnicodeString GetOwnerUnitName()=0;
10 };
11
12 class VL_KfpAsmTypeDecl : public VL_KfpAsmDecl
13 {
14 friend class VL_KfpAsmUnit;
15 protected:
16 VL_KfpIdTypeDeclaration::Ptr FInternalObject;
17
18 VL_KfpAsmTypeDecl(VL_KfpIdTypeDeclaration::Ptr Object);
19 public:
20 VL_KfpAsmTypeDecl();
21 ~VL_KfpAsmTypeDecl();
22
23 VUnicodeString GetName();
24 VUnicodeString GetOwnerUnitName();
25 VInt GetTypeParameterCount();
26 VUnicodeString GetTypeParameter(VInt Index);
27 VL_KfpIdType::Ptr GetReferencedType();
28 };
29
30 class VL_KfpAsmCtorDecl : public VL_KfpAsmDecl
31 {
32 friend class VL_KfpAsmUnit;
33 protected:
34 VL_KfpIdCtorDeclaration::Ptr FInternalObject;
35
36 VL_KfpAsmCtorDecl(VL_KfpIdCtorDeclaration::Ptr Object);
37 public:
38 VL_KfpAsmCtorDecl();
39 ~VL_KfpAsmCtorDecl();
40
41 VUnicodeString GetName();
42 VUnicodeString GetOwnerUnitName();
43 VUnicodeString GetOwnerTypeName();
44 VL_KfpIdType::Ptr GetType();
45 };
46
47 class VL_KfpAsmExpectedDecl : public VL_KfpAsmDecl
48 {
49 friend class VL_KfpAsmUnit;
50 protected:
51 VL_KfpIdExpectedDeclaration::Ptr FInternalObject;
52
53 VL_KfpAsmExpectedDecl(VL_KfpIdExpectedDeclaration::Ptr Object);
54 public:
55 VL_KfpAsmExpectedDecl();
56 ~VL_KfpAsmExpectedDecl();
57
58 VUnicodeString GetName();
59 VUnicodeString GetOwnerUnitName();
60 VInt GetTypeParameterCount();
61 VUnicodeString GetTypeParameter(VInt Index);
62 VL_KfpIdType::Ptr GetType();
63 };
64
65 class VL_KfpAsmFunctionDecl : public VL_KfpAsmDecl
66 {
67 friend class VL_KfpAsmUnit;
68 protected:
69 VL_KfpIdFunctionDeclaration::Ptr FInternalObject;
70
71 VL_KfpAsmFunctionDecl(VL_KfpIdFunctionDeclaration::Ptr Object);
72 public:
73 VL_KfpAsmFunctionDecl();
74 ~VL_KfpAsmFunctionDecl();
75
76 VUnicodeString GetName();
77 VUnicodeString GetOwnerUnitName();
78 VInt GetTypeParameterCount();
79 VUnicodeString GetTypeParameter(VInt Index);
80 VL_KfpIdType::Ptr GetType();
81 VBool IsExternalFunction();
82 VUnicodeString GetAlias();
83 };
84
85 class VL_KfpAsmUnit : public VL_Base
86 {
87 friend class VL_KfpAsmProgram;
88 protected:
89 VL_KfpIdTable::Ptr FTable;
90
91 VL_KfpAsmUnit(VL_KfpIdTable::Ptr Table);
92 public:
93 VL_KfpAsmUnit();
94 ~VL_KfpAsmUnit();
95
96 VUnicodeString GetName();
97 VInt GetImportCount();
98 VUnicodeString GetImport(VInt Index);
99 VInt GetTypeDeclarationCount();
100 VL_KfpAsmTypeDecl GetTypeDeclaration(VInt Index);
101 VInt GetCtorDeclarationCount();
102 VL_KfpAsmCtorDecl GetCtorDeclaration(VInt Index);
103 VInt GetExpectedDeclarationCount();
104 VL_KfpAsmExpectedDecl GetExpectedDeclaration(VInt Index);
105 VInt GetFunctionDeclarationCount();
106 VL_KfpAsmFunctionDecl GetFunctionDeclaration(VInt Index);
107 };
108
109 class VL_KfpAsmProgram : public VL_Base
110 {
111 friend class VL_KfpSymbol;
112 protected:
113 typedef VL_AutoPtr<VL_KfpAsmProgram> Ptr;
114 VL_KfpCodeUnitAnalyser* FAnalyser;
115
116 VL_KfpAsmProgram(VL_KfpCodeUnitAnalyser* Analyser);
117 public:
118 VL_KfpAsmProgram();
119 ~VL_KfpAsmProgram();
120
121 VInt GetUnitCount();
122 VL_KfpAsmUnit GetUnit(VInt Index);
123 };
124
125 /*********************************************************************************************************
126 脚本引擎
127 *********************************************************************************************************/
128
129 class VL_KfpSymbol : public VL_Base
130 {
131 protected:
132 VL_KfpCodeProvider FProvider;
133 VL_KfpCodeUnitAnalyser FAnalyser;
134 VL_KfpCodeUnit::List FCodeUnits;
135 VBool FErrorState;
136 VL_KfpAsmProgram::Ptr FProgram;
137 public:
138 VL_KfpSymbol();
139 ~VL_KfpSymbol();
140
141 VL_KfpCodeUnit::Ptr AddUnit(VUnicodeString Code , VL_KfpError::List& Errors);
142 void AddUnit(KfpUnit& Unit);
143 VBool PreCompile(VL_KfpError::List& Errors);
144 VBool IsErrorState();
145 VBool HasCodeUnit();
146 VL_KfpMachine::Ptr CreateMachine();
147 VUnicodeString GetReport();
148 VUnicodeString GetDebugInformation();
149 VL_KfpAsmProgram* GetProgramForReflection();
150 };
以下为使用方法。这是一个函数，从VL_KfpSymbol对象开始反射并打印出所反射到的内容：
1 void ReflectSymbol(VL_KfpSymbol* Symbol)
2 {
3 for(VInt i=0;i<Symbol->GetProgramForReflection()->GetUnitCount();i++)
4 {
5 VL_KfpAsmUnit Unit=Symbol->GetProgramForReflection()->GetUnit(i);
6 GetConsole()->Write(L"Unit : "+Unit.GetName()+L"\r\n");
7 for(VInt j=0;j<Unit.GetImportCount();j++)
8 {
9 GetConsole()->Write(L" Import : "+Unit.GetImport(j)+L"\r\n");
10 }
11 for(VInt j=0;j<Unit.GetTypeDeclarationCount();j++)
12 {
13 VL_KfpAsmTypeDecl TypeDecl=Unit.GetTypeDeclaration(j);
14 GetConsole()->Write(L" Type Declaration : "+TypeDecl.GetOwnerUnitName()+L"."+TypeDecl.GetName()+L"\r\n");
15 GetConsole()->Write(L" Parameters : ");
16 for(VInt k=0;k<TypeDecl.GetTypeParameterCount();k++)
17 {
18 GetConsole()->Write(TypeDecl.GetTypeParameter(k)+L" ");
19 }
20 GetConsole()->Write(L"\r\n");
21 GetConsole()->Write(L" Type :"+TypeDecl.GetReferencedType()->GenerateCode(L"")+L"\r\n");
22 }
23 for(VInt j=0;j<Unit.GetCtorDeclarationCount();j++)
24 {
25 VL_KfpAsmCtorDecl CtorDecl=Unit.GetCtorDeclaration(j);
26 GetConsole()->Write(L" Ctor Declaration : "+CtorDecl.GetOwnerUnitName()+L"."+CtorDecl.GetName()+L"\r\n");
27 GetConsole()->Write(L" Source : "+CtorDecl.GetOwnerTypeName()+L"\r\n");
28 GetConsole()->Write(L" Type :"+CtorDecl.GetType()->GenerateCode(L"")+L"\r\n");
29 }
30 for(VInt j=0;j<Unit.GetExpectedDeclarationCount();j++)
31 {
32 VL_KfpAsmExpectedDecl ExpectedDecl=Unit.GetExpectedDeclaration(j);
33 GetConsole()->Write(L" Expected Declaration : "+ExpectedDecl.GetOwnerUnitName()+L"."+ExpectedDecl.GetName()+L"\r\n");
34 GetConsole()->Write(L" Parameters : ");
35 for(VInt k=0;k<ExpectedDecl.GetTypeParameterCount();k++)
36 {
37 GetConsole()->Write(ExpectedDecl.GetTypeParameter(k)+L" ");
38 }
39 GetConsole()->Write(L"\r\n");
40 GetConsole()->Write(L" Type :"+ExpectedDecl.GetType()->GenerateCode(L"")+L"\r\n");
41 }
42 for(VInt j=0;j<Unit.GetFunctionDeclarationCount();j++)
43 {
44 VL_KfpAsmFunctionDecl FunctionDecl=Unit.GetFunctionDeclaration(j);
45 GetConsole()->Write(L" Function Declaration : "+FunctionDecl.GetOwnerUnitName()+L"."+FunctionDecl.GetName()+L"\r\n");
46 GetConsole()->Write(L" Parameters : ");
47 for(VInt k=0;k<FunctionDecl.GetTypeParameterCount();k++)
48 {
49 GetConsole()->Write(FunctionDecl.GetTypeParameter(k)+L" ");
50 }
51 GetConsole()->Write(L"\r\n");
52 GetConsole()->Write(L" Type :"+FunctionDecl.GetType()->GenerateCode(L"")+L"\r\n");
53 if(FunctionDecl.IsExternalFunction())
54 {
55 GetConsole()->Write(L" Alias :"+FunctionDecl.GetAlias()+L"\r\n");
56 }
57 }
58 GetConsole()->Write(L"按[ENTER]继续
");
59 GetConsole()->WaitForEnter();
60 }
61 }
对于宿主程序来说，反射主要用于检查连接函数的类型，并根据不同的类型使用不同的求值方法进行求值。
posted on 2008-12-20 06:10
陈梓瀚(vczh) 阅读(1391)
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