ENH: Providing ITKv5 updates for C++11 #3
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== http://en.cppreference.com/w/cpp/language/type_alias == Type alias is a name that refers to a previously defined type (similar to typedef). A type alias declaration introduces a name which can be used as a synonym for the type denoted by type-id. It does not introduce a new type and it cannot change the meaning of an existing type name. There is no difference between a type alias declaration and typedef declaration. This declaration may appear in block scope, class scope, or namespace scope. == https://www.quora.com/Is-using-typedef-in-C++-considered-a-bad-practice == While typedef is still available for backward compatibility, the new Type Alias syntax 'using Alias = ExistingLongName;' is more consistent with the flow of C++ than the old typedef syntax 'typedef ExistingLongName Alias;', and it also works for templates (Type alias, alias template (since C++11)), so leftover 'typedef' aliases will differ in style from any alias templates.
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This pull request incorporates code changes
that happened in parallel with updating the
core ITK code to ITKv5 for C++11 conformity.