forked from boostorg/smart_ptr
51 lines
1.1 KiB
Plaintext
51 lines
1.1 KiB
Plaintext
////
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Copyright 2020 Peter Dimov
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Distributed under the Boost Software License, Version 1.0.
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https://www.boost.org/LICENSE_1_0.txt
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////
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[#owner_less]
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# owner_less
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:toc:
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:toc-title:
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:idprefix: owner_less_
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## Description
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`owner_less<T>` is a helper function object that compares two smart
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pointer objects using `owner_before`. It is only provided for compatibility
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with {cpp}11 and corresponds to the standard component of the same name.
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When using Boost smart pointers, the use of `owner_less` is unnecessary, as
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the supplied `operator<` overloads (and, correspondingly, `std::less`) return
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the same result.
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## Synopsis
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`owner_less` is defined in `<boost/smart_ptr/owner_less.hpp>`.
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```
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namespace boost {
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template<class T = void> struct owner_less
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{
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typedef bool result_type;
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typedef T first_argument_type;
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typedef T second_argument_type;
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template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
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};
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}
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```
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## Members
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```
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template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
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```
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[none]
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* {blank}
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+
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Returns::
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`u.owner_before( v )`.
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