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27 
28 #ifndef ADC_CPP_SUB_PE_HXX
29 #define ADC_CPP_SUB_PE_HXX
30 
31 
32 
33 // USED SERVICES
34 	// BASE CLASSES
35 	// COMPONENTS
36 	// PARAMETERS
37 
38 
39 class ParseEnvironment;
40 
41 template <class PE, class SUB>
42 class SubPe
43 {
44   public:
45 	typedef SubPe< PE, SUB > 	self;
46 
47 						SubPe(
48 							PE &				i_rParent );
49 	PE &				Parent() const;
50 	SUB &				Child() const;
51 
52 	ParseEnvironment &	Get() const;
53 
54   private:
55 	SUB &				CreateChild() const;
56 
57 	PE &				rParent;
58 	Dyn<SUB>			pChild;
59 };
60 
61 
62 
63 // IMPLEMENTATION
64 
65 
66 // 	SubPe
67 
68 template <class PE, class SUB>
69 SubPe<PE,SUB>::SubPe( PE & i_rParent )
70 	:	rParent(i_rParent)
71 {
72 }
73 
74 template <class PE, class SUB>
75 PE &
76 SubPe<PE,SUB>::Parent() const
77 {
78  	return rParent;
79 }
80 
81 template <class PE, class SUB>
82 inline SUB &
83 SubPe<PE,SUB>::Child() const
84 {
85 	return pChild ? *pChild.MutablePtr() : CreateChild();
86 }
87 
88 template <class PE, class SUB>
89 ParseEnvironment &
90 SubPe<PE,SUB>::Get() const
91 {
92 	return Child();
93 }
94 
95 template <class PE, class SUB>
96 SUB &
97 SubPe<PE,SUB>::CreateChild() const
98 {
99     self * pThis = const_cast< self* >(this);
100 
101     SUB * pNewChild = new SUB( &rParent);
102 
103 	pThis->pChild = pNewChild;
104 
105 	return *pChild.MutablePtr();
106 }
107 
108 
109 
110 
111 #endif
112 
113