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#### time_traits< boost::posix_time::ptime >::subtract

Subtract one time from another.

    static duration_type subtract(
        const time_type & t1,
        const time_type & t2);

| Copyright © 2003-2015 Christopher M. Kohlhoff Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)