Platform, default, and cli Namespaces (C++/CLI and C++/CX)
A namespace qualifies the names of language elements so the names do not conflict with otherwise identical names elsewhere in the source code. For example, a name collision might prevent the compiler from recognizing Context-Sensitive Keywords. Namespaces are used by the compiler but are not preserved in the compiled assembly.
All Runtimes
Visual Studio provides a default namespace for your project when you create the project. You can manually rename the namespace, although in C++/CX the name of the .winmd file must match the name of the root namespace.
Windows Runtime
For more information, see Namespaces and type visibility (C++/CX).
Requirements
Compiler option: /ZW
Common Language Runtime
Syntax
using namespace cli;
Remarks
The C++/CLI supports the cli namespace. When compiling with /clr, the using statement in the Syntax section is implied.
The following language features are in the cli namespace:
Requirements
Compiler option: /clr
Examples
The following code example demonstrates that it is possible to use a symbol in the cli namespace as a user-defined symbol in your code. However, once you have done so, you will have to explicitly or implicitly qualify your references to the cli language element of the same name.
// cli_namespace.cpp
// compile with: /clr
using namespace cli;
int main() {
array<int> ^ MyArray = gcnew array<int>(100);
int array = 0;
array<int> ^ MyArray2 = gcnew array<int>(100); // C2062
// OK
cli::array<int> ^ MyArray2 = gcnew cli::array<int>(100);
::array<int> ^ MyArray3 = gcnew ::array<int>(100);
}