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.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

78 lines
1.7 KiB

20 years ago
/** @file
$Id$
$Date$
$Author$
@copy © Marc Wäckerlin
@license LGPL, see file <a href="license.html">COPYING</a>
$Log$
Revision 1.1 2004/10/07 09:31:30 marc
new feature
*/
#ifndef __MRW__LIST__HPP__
#define __MRW__LIST__HPP__
#include <list>
#include <mrw/exception.hpp>
#include <mrw/string.hpp>
/** @addtogroup StdExt
*/
//@{
/** @brief push a value to a list
@code
std::list<int> test;
test<<1<<2<<3<<4<<5<<6<<7<<8;
@endcode
@param l a list of values
@param o a value to be inserted into list @c l
@pre #include <mrw/list.hpp>
*/
template <typename T, typename A>
std::list<T, A>& operator<<(std::list<T, A>& l, const T& o) throw(std::bad_exception) {
l.push_back(o);
return l;
}
/** @brief extract the first value of a list
@code
std::list<int> test;
test<<1<<2<<3<<4<<5<<6<<7<<8;
int i1(0), i2(0), i3(0), i4(0);
test>>i1>>i2>>i3>>i4;
// now: i1==1 i2==2 i3==3 i4==4 test=={5, 6, 7, 8}
@endcode
@param l a list of values
@param o a value to be extracted from list @c l
@throw mrw::length_error, if list was empty on entry
@note when something is extracted from a list, it is removed
from the list, that means after every shift the list is
shortened by the shifted element
@pre #include <mrw/string.hpp>
*/
template <typename T, typename A>
std::list<T, A>& operator>>(std::list<T, A>& l, T& o) throw(std::exception) {
typename std::list<T, A>::iterator it(l.begin());
if (it==l.end())
throw mrw::length_error(std::string(__FILE__ ":")+__LINE__+
": std::list<>& operator>>(std::list<>&, T&),"
" list is empty");
o = *it;
l.erase(it);
return l;
}
//@}
#endif