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Section: 22.10.17 [func.wrap] Status: CD1 Submitter: Daniel Krügler Opened: 2008-01-10 Last modified: 2016-01-28
Priority: Not Prioritized
View all issues with CD1 status.
Discussion:
It is expected that typical implementations of std::function will
use dynamic memory allocations at least under given conditions,
so it seems appropriate to change the current lvalue swappabilty of
this class to rvalue swappability.
Proposed resolution:
In 22.10 [function.objects], header <functional> synopsis, just below of
template<class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&); template<class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&&, function<R(ArgTypes...)>&); template<class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&&);
In 22.10.17.3 [func.wrap.func] class function definition, change
void swap(function&&);
In 22.10.17.3 [func.wrap.func], just below of
template <class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&); template <class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&&, function<R(ArgTypes...)>&); template <class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&&);
In 22.10.17.3.3 [func.wrap.func.mod] change
void swap(function&& other);
In 22.10.17.3.8 [func.wrap.func.alg] add the two overloads
template<class R, class... ArgTypes> void swap(function<R(ArgTypes...)>&& f1, function<R(ArgTypes...)>& f2); template<class R, class... ArgTypes> void swap(function<R(ArgTypes...)>& f1, function<R(ArgTypes...)>&& f2);