Hi,
Some time ago I added an experimental support for C++ initializer lists in geometries to make possible the creation of geometries using uniform initialization, e.g.:
linestring ls = {{0, 0},{1, 1},{2, 2}};
polygon poly = {{{0, 0},{0, 5},{5, 5},{5, 0},{0, 0}},{{1, 1},{4, 1},{4, 4},{1, 4},{1, 1}}};
The goal was to support C++11 initializer lists and Boost.Assign in the
same time even if Boost.Assign currently doesn't work on all compilers with STL containers. FYI, there is a
PR with proposed fix but nobody is willing to merge it.
Anyway, to work around it and avoid ambiguity while using Boost.Assign to assign new data to the geometry I implemented only the constructor taking std::initializer_list. This way the compiler prefers the conversion from Boost.Assign generic_list directly into the Geometry because conversion first to std::initializer_list would require 1 more conversion.
It seems that everything is ok on all compilers except the msvc14 CTP, I hope they'll fix it in the final release. See
http://www.boost.org/development/tests/develop/developer/geometry.html, the test geometries.
So if you'd like to try it out you have to checkout the develop branch and define BOOST_GEOMETRY_EXPERIMENTAL_ENABLE_INITIALIZER_LIST. Please let me know if it works for you.
The final question is, should we enable it by default in Boost 1.58?
Regards,
Adam