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Marked none instances as inline variables.

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This should avoid duplicating none instances in all translation units.

Closes https://github.com/boostorg/optional/issues/33.
This commit is contained in:
Andrey Semashev
2019-10-29 21:21:03 +03:00
committed by Andrzej Krzemienski
parent 29dfc173c6
commit 9ed20cb085
1 changed files with 4 additions and 3 deletions
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5
include/boost/none.hpp
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@ -13,6 +13,7 @@
#ifndef BOOST_NONE_17SEP2003_HPP #ifndef BOOST_NONE_17SEP2003_HPP
#define BOOST_NONE_17SEP2003_HPP #define BOOST_NONE_17SEP2003_HPP
#include "boost/config.hpp"
#include "boost/none_t.hpp" #include "boost/none_t.hpp"
// NOTE: Borland users have to include this header outside any precompiled headers // NOTE: Borland users have to include this header outside any precompiled headers
@ -23,7 +24,7 @@ namespace boost {
#ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE #ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE
none_t const none = (static_cast<none_t>(0)) ; BOOST_INLINE_VARIABLE none_t const none = (static_cast<none_t>(0)) ;
#elif defined BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE #elif defined BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE
@ -49,7 +50,7 @@ namespace {
#else #else
const none_t none ((none_t::init_tag())); BOOST_INLINE_VARIABLE const none_t none ((none_t::init_tag()));
#endif // older definitions #endif // older definitions