问题
In C#, I like the var keyword for situations like this:
var myList = new List<MyType>();
Is there any equivalent in C++/CLI, or do I have to repeat the type name everytime just like this:
List<MyType ^>^ myList = gcnew List<MyType ^>();
Could not find an explicit statement in the docs or by Google so far. I am using Visual Studio 2008.
回答1:
In Visual Studio 2008 there is no such equivalent. However with Visual Studio 2010 you can use the auto keyword to implement var like semantics in C++. I know this works with non-managed C++ and I'm fairly certain it works for C++/CLI as well.
回答2:
I know that type inference is envisioned in the C++1x standard:
auto someStrangeCallableType = boost::bind(&SomeFunction, _2, _1, someObject);
auto otherVariable = 5;
Currently, AFAIK, there is no equivalent.
回答3:
C++ has typedef. Just alias those hairy types with a typedef, and use the friendly name.
No, there's no "var" keyword. Vaguely recall there's something to that effect in boost.
回答4:
C++0x is going to have an auto keyword: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1705.pdf
来源：https://stackoverflow.com/questions/2007976/is-there-an-equivalent-to-the-c-sharp-var-keyword-in-c-cli