| #ifndef _unary_h |
| #define _unary_h |
| #include <cmath> |
| #include <cfloat> |
| #include <functional> //*TY 12/26/1998 - added to get unary_function |
| |
| #if !defined (STLPORT) || defined (_STLP_USE_NAMESPACES) |
| using std::unary_function; |
| #endif |
| |
| struct odd : public unary_function<int, bool> { |
| bool operator()(int n_) const { return(n_ % 2) == 1; } |
| }; |
| |
| struct positive : public unary_function<int, bool> { |
| bool operator()(int n_) const { return n_ >= 0; } |
| }; |
| |
| struct square_root : public unary_function<double, double> { |
| double operator()(double x_) const |
| { return ::sqrt(x_); } |
| }; |
| #endif // _unary_h |
