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tree_traits: Add include for boost::tie().

This lets examples/graph_as_tree compile.
This commit is contained in:
Murray Cumming
2016-05-02 20:45:51 +02:00
committed by Vladimir Prus
parent 15872fe070
commit e4aa48bc4b

View File

@@ -6,6 +6,8 @@
#ifndef BOOST_TREE_STRUCTURE_HPP
#define BOOST_TREE_STRUCTURE_HPP
#include <boost/tuple/tuple.hpp> //For boost::tie()
namespace boost {
template <class T>