Improved LEMON_FUNCTION_NAME macro.
It should work fine with GCC and the MS C++ compilers. Otherwise it reverts to
using the __func__ variable which is C99, but I couldn't find a better
alternative.
3 * This file is a part of LEMON, a generic C++ optimization library
5 * Copyright (C) 2003-2008
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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