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OS/2 Shareware BBS: 10 Tools
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stlpt453.zip
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STLport-4.5.3
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test
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regression
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fadapter.h
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C/C++ Source or Header
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2001-03-02
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2KB
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82 lines
#ifndef _fadapter_h_
#define _fadapter_h_
#include <functional>
// used as adaptor's return/argument type,
// to allow binders/composers usage
struct __void_tag {};
# if !defined (STLPORT) || defined (__STL_USE_NAMESPACES)
using std::unary_function;
# endif
template <class Result>
class pointer_to_void_function {
protected:
Result (*ptr)();
public:
explicit pointer_to_void_function(Result (*x)()) : ptr(x) {}
Result operator()() const { return ptr(); }
Result operator()(__void_tag) const { return ptr(); }
};
// to feed composers
template <class Arg1>
struct projectvoid :
public unary_function<Arg1,__void_tag> {
__void_tag operator()(const Arg1& x) const { return __void_tag(); }
};
# if !defined (_STLP_MEMBER_POINTER_PARAM_BUG)
template <class Result>
pointer_to_void_function<Result> ptr_fun(Result (*x)()) {
return pointer_to_void_function<Result>(x);
}
// alternate name
template <class Result>
pointer_to_void_function<Result> ptr_gen(Result (*x)()) {
return pointer_to_void_function<Result>(x);
}
# endif /* !defined (__STL_MEMBER_POINTER_PARAM_BUG) */
template <class Arg>
class pointer_to_unary_procedure /* :public unary_function<Arg, __void_tag> */ {
protected:
typedef void (*fun_type)(Arg);
fun_type ptr;
public:
typedef Arg argument_type;
pointer_to_unary_procedure() {}
pointer_to_unary_procedure(fun_type x) : ptr(x) {}
void operator() (Arg x) const { ptr(x); }
};
template <class Arg>
inline pointer_to_unary_procedure<Arg> ptr_proc(void (*x)(Arg)) {
return pointer_to_unary_procedure<Arg>(x);
}
template <class Arg1, class Arg2>
class pointer_to_binary_procedure /* : public unary_function<Arg1, Arg2, __void_tag> */ {
protected:
typedef void (*fun_type)(Arg1, Arg2);
fun_type ptr;
public:
typedef Arg1 first_argument_type;
typedef Arg2 second_argument_type;
pointer_to_binary_procedure() {}
pointer_to_binary_procedure(fun_type x) : ptr(x) {}
void operator() (Arg1 x, Arg2 y) const { ptr(x, y); }
};
template <class Arg1, class Arg2>
inline pointer_to_binary_procedure<Arg1, Arg2> ptr_proc(void (*x)(Arg1, Arg2)) {
return pointer_to_binary_procedure<Arg1, Arg2>(x);
}
#endif