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feat(library/vm/vm): add missing swap

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Leonardo de Moura 2016-05-12 19:01:25 -07:00
parent 682407b54d
commit 4e9cafb67f
1 changed files with 2 additions and 0 deletions
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2
src/library/vm/vm.h
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@ -51,6 +51,8 @@ public:
vm_obj(vm_obj && o):m_data(o.m_data) { o.m_data = LEAN_VM_BOX(0); }
~vm_obj() { if (LEAN_VM_IS_PTR(m_data)) m_data->dec_ref(); }
friend void swap(vm_obj & a, vm_obj & b) { std::swap(a.m_data, b.m_data); }
vm_obj & operator=(vm_obj const & s) {
if (LEAN_VM_IS_PTR(s.m_data))
s.m_data->inc_ref();