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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87 lines
2.3 KiB
87 lines
2.3 KiB
20 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__MAP__HPP__
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#define __MRW__MAP__HPP__
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#include <map>
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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 map
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@code
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std::map<int, std::string> test;
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test<<std::make_pair(1, std::string("one"))
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<<std::make_pair(2, std::string("two"));
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@endcode
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@throw mrw::invalid_argument, if element is already in map
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@param l a map of values
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@param o a value to be inserted into map @c l
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@pre #include <mrw/map.hpp>
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*/
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template <typename K, typename T, class C, typename A>
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std::map<K, T, C, A>& operator<<(std::map<K, T, C, A>& l, const std::pair<K, 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::map<>&"
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" operator<<(std::map<>&, const T&),"
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"map element already exists");
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return l;
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}
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/** @brief extract the first value of a map
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@code
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std::map<int, std::string> test;
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test<<std::make_pair(1, std::string("one"))
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<<std::make_pair(2, std::string("two"));
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std::pair<int, std::string> i1, i2;
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test>>i1>>i2;
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// now: i1==(1, "one") i2==(2, "two") test=={}
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@endcode
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@param l a map of values
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@param o a value to be extracted from map @c l
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@throw mrw::length_error, if map was empty on entry
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@note when something is extracted from a map, it is removed
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from the map, that means after every shift the map 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 K, typename T, class C, typename A>
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std::map<K, T, C, A>& operator>>(std::map<K, T, C, A>& l, std::pair<K, T>& o)
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throw(std::exception) {
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typename std::map<K, 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::map<>& operator>>(std::map<>&, T&),"
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" map 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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