Go to the documentation of this file.00001 #ifndef PhysicsTools_Utilities_Function_h
00002 #define PhysicsTools_Utilities_Function_h
00003 #include "PhysicsTools/Utilities/interface/Variables.h"
00004 #include "PhysicsTools/Utilities/interface/Expression.h"
00005 #include <boost/mpl/for_each.hpp>
00006
00007 namespace funct {
00008
00009 struct null_var;
00010
00011 template<typename X1 = null_var, typename X2 = null_var, typename X3 = null_var>
00012 struct Function {
00013 template<typename F>
00014 Function(const F& f) : _f(f) { }
00015 double operator()(typename X1::type x1,
00016 typename X2::type x2,
00017 typename X3::type x3) const {
00018 X1::set(x1); X2::set(x2); X3::set(x3); return _f();
00019 }
00020 std::ostream& print(std::ostream& cout) const { return _f.print(cout); }
00021 private:
00022 Expression _f;
00023 };
00024
00025 template<typename X1, typename X2>
00026 struct Function<X1, X2, null_var> {
00027 template<typename F>
00028 Function(const F& f) : _f(f) { }
00029 double operator()(typename X1::type x1,
00030 typename X2::type x2) const {
00031 X1::set(x1); X2::set(x2); return _f();
00032 }
00033 std::ostream& print(std::ostream& cout) const { return _f.print(cout); }
00034 private:
00035 Expression _f;
00036 };
00037
00038 template<typename X1>
00039 struct Function<X1, null_var, null_var> {
00040 template<typename F>
00041 Function(const F& f) : _f(f) { }
00042 double operator()(typename X1::type x1) const { X1::set(x1); return _f(); }
00043 std::ostream& print(std::ostream& cout) const { return _f.print(cout); }
00044 private:
00045 Expression _f;
00046 };
00047
00048 template<typename X1, typename X2, typename X3>
00049 std::ostream& operator<<(std::ostream& cout, const Function<X1, X2, X3>& f) {
00050 return f.print(cout);
00051 }
00052
00053 }
00054
00055
00056 #endif
1.7.3