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remove copying when invoking objects stored in sbo #24

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Merged
pdimov merged 1 commit into from
Jan 22, 2026
Merged

remove copying when invoking objects stored in sbo #24

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29 changes: 17 additions & 12 deletions include/boost/compat/move_only_function.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -435,6 +435,22 @@ struct move_only_function_base
{
}

template<class VT, class ...CArgs>
void init_object( std::false_type /* use_sbo */, CArgs&& ...args )
{
s_.pobj_ = new VT( std::forward<CArgs>( args )... );
invoke_ = &mo_invoke_object_holder<RQ, Const, NoEx, VT, R, Args...>::invoke_object;
manager_ = &manage_object<VT>;
}

template<class VT, class ...CArgs>
void init_object( std::true_type /* use_sbo */, CArgs&& ...args )
{
new( s_.addr() ) VT( std::forward<CArgs>( args )... );
invoke_ = &mo_invoke_local_holder<RQ, Const, NoEx, VT, R, Args...>::invoke_local;
manager_ = &manage_local<VT>;
}

template<class VT, class ...CArgs>
void init( std::false_type /* is_function */, CArgs&& ...args )
{
Expand All @@ -444,18 +460,7 @@ struct move_only_function_base
return;
}

if( !storage::use_sbo<VT>() )
{
s_.pobj_ = new VT( std::forward<CArgs>( args )... );
invoke_ = &mo_invoke_object_holder<RQ, Const, NoEx, VT, R, Args...>::invoke_object;
manager_ = &manage_object<VT>;
}
else
{
new( s_.addr() ) VT( std::forward<CArgs>( args )... );
invoke_ = &mo_invoke_local_holder<RQ, Const, NoEx, VT, R, Args...>::invoke_local;
manager_ = &manage_local<VT>;
}
init_object<VT>( std::integral_constant<bool, storage::use_sbo<VT>()>{}, std::forward<CArgs>( args )... );
}

template<class VT, class ...CArgs>
Expand Down