C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.
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85 lines
2.1 KiB
85 lines
2.1 KiB
21 years ago
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/** @file
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$Id$
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$Date$
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$Author$
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@copy © Marc Wäckerlin
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@license LGPL, see file <a href="license.html">COPYING</a>
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$Log$
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Revision 1.1 2004/10/07 09:31:30 marc
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new feature
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*/
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#ifndef __MRW__SET__HPP__
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#define __MRW__SET__HPP__
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#include <set>
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#include <mrw/exception.hpp>
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#include <mrw/string.hpp>
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/** @addtogroup StdExt
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*/
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//@{
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/** @brief insert a value in a set
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@code
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std::set<int> test;
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test<<1<<2<<3<<4<<5<<6<<7<<8;
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@endcode
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@throw mrw::invalid_argument, if element is already in set
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@param l a set of values
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@param o a value to be inserted into set @c l
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@pre #include <mrw/set.hpp>
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*/
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template <typename T, class C, typename A>
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std::set<T, C, A>& operator<<(std::set<T, C, A>& l, const T& o)
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throw(std::exception) {
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if (!l.insert(o).second)
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throw mrw::invalid_argument(std::string(__FILE__ ":")+__LINE__+
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": std::set<>&"
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" operator<<(std::set<>&, const T&),"
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"set element already exists");
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return l;
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}
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/** @brief extract the first value of a set
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@code
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std::set<int> test;
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test<<1<<2<<3<<4<<5<<6<<7<<8;
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int i1(0), i2(0), i3(0), i4(0);
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test>>i1>>i2>>i3>>i4;
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// now: i1==1 i2==2 i3==3 i4==4 test=={5, 6, 7, 8}
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@endcode
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@param l a set of values
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@param o a value to be extracted from set @c l
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@throw mrw::length_error, if set was empty on entry
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@note when something is extracted from a set, it is removed
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from the set, that means after every shift the set is
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shortened by the shifted element
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@pre #include <mrw/string.hpp>
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*/
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template <typename T, class C, typename A>
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std::set<T, C, A>& operator>>(std::set<T, C, A>& l, T& o)
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throw(std::exception) {
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typename std::set<T, C, A>::iterator it(l.begin());
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if (it==l.end())
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throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
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": std::set<>& operator>>(std::set<>&, T&),"
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" set is empty");
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o = *it;
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l.erase(it);
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return l;
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}
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//@}
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#endif
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