31
|
1 |
/*
|
|
2 |
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
3 |
* All rights reserved.
|
|
4 |
* This component and the accompanying materials are made available
|
|
5 |
* under the terms of "Eclipse Public License v1.0"
|
|
6 |
* which accompanies this distribution, and is available
|
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
8 |
*
|
|
9 |
* Initial Contributors:
|
|
10 |
* Nokia Corporation - initial contribution.
|
|
11 |
*
|
|
12 |
* Contributors:
|
|
13 |
*
|
|
14 |
* Description:
|
|
15 |
*
|
|
16 |
*/
|
|
17 |
#ifndef _unary_h
|
|
18 |
#define _unary_h
|
|
19 |
#include <cmath>
|
|
20 |
#include <cfloat>
|
|
21 |
#include <functional> //*TY 12/26/1998 - added to get unary_function
|
|
22 |
|
|
23 |
#if !defined (STLPORT) || defined (_STLP_USE_NAMESPACES)
|
|
24 |
using std::unary_function;
|
|
25 |
#endif
|
|
26 |
|
|
27 |
struct odd : public unary_function<int, bool>
|
|
28 |
{
|
|
29 |
// odd() {}
|
|
30 |
bool operator()(int n_) const { return(n_ % 2) == 1; }
|
|
31 |
};
|
|
32 |
|
|
33 |
struct positive : public unary_function<int, bool>
|
|
34 |
{
|
|
35 |
typedef int argument_type;
|
|
36 |
typedef bool result_type;
|
|
37 |
// positive() {}
|
|
38 |
bool operator()(int n_) const { return n_ >= 0; }
|
|
39 |
};
|
|
40 |
|
|
41 |
struct square_root : public unary_function<double, double>
|
|
42 |
{
|
|
43 |
typedef double argument_type;
|
|
44 |
typedef double result_type;
|
|
45 |
square_root() {}
|
|
46 |
square_root(const square_root &) {}
|
|
47 |
double operator()(double x_) const
|
|
48 |
{ return ::sqrt(x_); }
|
|
49 |
};
|
|
50 |
#endif // _unary_h
|