author | deba |
Sat, 09 Apr 2005 19:27:48 +0000 | |
changeset 1330 | 52ef02524468 |
permissions | -rw-r--r-- |
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// -*- mode:C++ -*- |
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////////////////////////////////////////////////////////////////////// |
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// Named "function" parameters |
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////////////////////////////////////////////////////////////////////// |
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|
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class named_fn |
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{ |
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int _id; |
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double _val; |
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int _dim; |
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|
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public: |
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named_fn() : _id(0), _val(1), _dim(2) {} |
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named_fn& id(int p) { _id = p ; return *this; } |
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named_fn& val(double p) { _val = p ; return *this; } |
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named_fn& dim(int p) { _dim = p ; return *this; } |
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~named_fn() { |
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//Itt van maga az algoritmus |
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} |
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}; |
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|
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//Hasznalat: |
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//named_fn().id(3); |
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//named_fn().id(3).val(2); |
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//named_fn().dim(4).id(3); |
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////////////////////////////////////////////////////////////////////// |
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// Named class template parameters (A) |
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////////////////////////////////////////////////////////////////////// |
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template<class A=int,class B=double> |
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class Named_T |
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{ |
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public: |
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typedef A Atype; |
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typedef B Btype; |
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template <class T> class SetAType : public Named_T<T,Btype> { }; |
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template <class T> class SetBType : public Named_T<Atype,T> { }; |
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}; |
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// Named_T<>::SetAType<double>::SetBType<double> |
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////////////////////////////////////////////////////////////////////// |
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// Named class template parameters (A) |
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////////////////////////////////////////////////////////////////////// |
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struct _NTR |
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{ |
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typedef int Atype; |
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typedef double Btype; |
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}; |
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template<class TR=_NTR> |
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class Named_TR |
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{ |
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public: |
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typedef typename TR::Atype Atype; |
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typedef typename TR::Btype Btype; |
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Atype a; |
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Btype b; |
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template <class T> |
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struct ATR : public TR { |
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typedef T Atype; |
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}; |
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template <class T> |
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class SetAType : public Named_TR<ATR<T> > { }; |
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template <class T> |
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struct BTR : public TR { |
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typedef T Btype; |
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}; |
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template <class T> |
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class SetBType : public Named_TR<BTR<T> > { }; |
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Named_TR() {}; |
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Named_TR<TR> &setA(Atype _a) { a=_a; return *this;} |
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Named_TR<TR> &setB(Btype _b) { b=_b; return *this;} |
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void run() { |
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// itt az algoritmus |
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} |
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|
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////////////////////////////////////////////////////////////////////// |
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template<class T> |
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SetAType<T> SETA(T t) { SetAType<T> r; r.a=t; r.b=b; return r;} |
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template<class T> |
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SetBType<T> SETB(T t) { SetBType<T> r; r.a=a; r.b=t; return r;} |
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}; |
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|
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// Hasznalat: |
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// 1. |
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// Named_TR<>::SetAType<double> nt; |
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// Named_TR<>::SetBType<double>::SetAType<double> nt2; |
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// nt2.setA(5).setB(6).run(); |
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// 2. |
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// double x; |
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// Named_TR<>().SETA(5.2).SETB(x).run(); |
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// 3. |
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// struct MyTr : public _NTR { typedef float Btype; }; |
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// int main() |
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// { |
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// Named_TR<MyTr> d2; d2=d2; |
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// } |
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// Sajnos ezt csak a fuggvenyen kivul lehet deklaralni: |
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struct MyTr : public _NTR { typedef float Btype; }; |
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typedef Named_T<> Named_TN; |
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int main() |
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{ |
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|
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Named_T<> a;a=a; |
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Named_T<>::SetAType<double> b;b=b; |
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Named_T<>::SetAType<double>::SetBType<int> c;c=c; |
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|
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Named_TR<> a2;a2=a2; |
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Named_TR<>::SetAType<double> b2;b2=b2; |
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Named_TR<>::SetAType<double>::SetBType<int> c2;c2=c2; |
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|
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//De igy is lehet: |
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Named_TR<MyTr> d2; d2=d2; |
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|
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named_fn().id(3); |
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named_fn().id(3).val(2); |
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named_fn().dim(4).id(3); |
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|
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Named_TR<>::SetAType<double> nt; |
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Named_TR<>::SetBType<double>::SetAType<double> nt2; |
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nt2.setA(5).setB(6).run(); |
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|
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double x; |
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Named_TR<>().SETA(5.2).SETB(x).run(); |
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} |
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