关于分配器重新绑定的查询
A query regarding allocator rebind
之下
想澄清以下内容：
A::template rebind::other (optional1)
Notes: 1 rebind is only optional (provided by std::allocator_traits)
if this allocator is a template of the form SomeAllocator<T, Args>,
where Args is zero or more additional template parameters.
为什么在上述情况下 rebind 是可选的？
标准库总是通过 std::allocator_traits 模板访问分配器。如果此模板符合 Alloc<U, Args>
形式，则它会提供 rebind 的默认定义
rebind_alloc<T> Alloc::rebind<T>::other if present, otherwise Alloc<T, Args> if this Alloc is Alloc<U, Args> - cppreference.com : std::allocator_traits
想澄清以下内容：
A::template rebind::other (optional1)
Notes: 1 rebind is only optional (provided by
std::allocator_traits) if this allocator is a template of the formSomeAllocator<T, Args>, whereArgsis zero or more additional template parameters.
为什么在上述情况下 rebind 是可选的？
标准库总是通过 std::allocator_traits 模板访问分配器。如果此模板符合 Alloc<U, Args>
rebind 的默认定义
rebind_alloc<T>Alloc::rebind<T>::otherif present, otherwiseAlloc<T, Args>if thisAllocisAlloc<U, Args>- cppreference.com : std::allocator_traits