105 lines
4.6 KiB
C++
105 lines
4.6 KiB
C++
/* ========================================================================= *
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* *
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* OpenMesh *
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* Copyright (c) 2001-2015, RWTH-Aachen University *
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* Department of Computer Graphics and Multimedia *
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* All rights reserved. *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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*---------------------------------------------------------------------------*
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* *
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* Redistribution and use in source and binary forms, with or without *
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* modification, are permitted provided that the following conditions *
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* are met: *
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* *
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* 1. Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* 2. Redistributions in binary form must reproduce the above copyright *
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* notice, this list of conditions and the following disclaimer in the *
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* documentation and/or other materials provided with the distribution. *
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* *
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* 3. Neither the name of the copyright holder nor the names of its *
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* contributors may be used to endorse or promote products derived from *
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* this software without specific prior written permission. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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* *
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* ========================================================================= */
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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#ifndef CMDOPTION
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#define CMDOPTION
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template <typename T>
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class CmdOption
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{
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public:
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typedef T value_type;
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explicit CmdOption(const T& _val) : val_(_val), valid_(true), enabled_(false) { }
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CmdOption() : val_(T()),valid_(false), enabled_(false) { }
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// has been set and has a value
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bool is_valid(void) const { return valid_; }
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bool has_value(void) const { return is_valid(); }
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// has been set and may have an value (check with is_valid())
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bool is_enabled() const { return enabled_; }
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void enable() { enabled_ = true; }
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CmdOption& operator = ( const T& _val )
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{
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val_ = _val;
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valid_=true;
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enable();
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return *this;
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}
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operator T () const { return val_; }
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// operator const T& () const { return val_; }
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operator T* () const { return is_valid() ? &val_ : NULL; }
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private:
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T val_;
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bool valid_;
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bool enabled_;
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private: // non-copyable
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CmdOption(const CmdOption&);
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CmdOption& operator = ( const CmdOption& );
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};
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template < typename T >
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std::ostream& operator << ( std::ostream& _os, CmdOption<T>& _opt )
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{
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_os << (T&)_opt;
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return _os;
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}
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#endif
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