genericopenlibs/cppstdlib/stl/test/unit/unary.h
author Pat Downey <patd@symbian.org>
Fri, 04 Jun 2010 16:20:51 +0100
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#ifndef _unary_h
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#define _unary_h
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#include <cmath>
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#include <cfloat>
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#include <functional>    //*TY 12/26/1998 - added to get unary_function
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#if !defined (STLPORT) || defined (_STLP_USE_NAMESPACES)
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using std::unary_function;
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#endif
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struct odd : public unary_function<int, bool>
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{
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//  odd() {}
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  bool operator()(int n_) const { return(n_ % 2) == 1; }
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};
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struct positive : public unary_function<int, bool>
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{
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  typedef int argument_type;
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  typedef bool result_type;
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//  positive() {}
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  bool operator()(int n_) const { return n_ >= 0; }
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};
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struct square_root : public unary_function<double, double>
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{
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  typedef double argument_type;
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  typedef double result_type;
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  square_root() {}
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  square_root(const square_root &) {}
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  double operator()(double x_) const
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  { return ::sqrt(x_); }
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};
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#endif // _unary_h