Index: boost_1_53_0/boost/chrono/duration.hpp
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<       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const RhsDuration& rhs)
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>       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const RhsDuration& rhs) const
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<       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const LhsDuration& rhs)
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>       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const LhsDuration& rhs) const
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<       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const RhsDuration& rhs)
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>       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const RhsDuration& rhs) const
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<       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const LhsDuration& rhs)
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>       BOOST_CONSTEXPR bool operator()(const LhsDuration& lhs, const LhsDuration& rhs) const