Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

Platform, default, and cli Namespaces (C++ Component Extensions)

A namespace implicitly qualifies the names of language elements so the names do not conflict with user-defined symbols in existing source code.

Visual C++ provides separate namespaces for sets of similar data types in C++/CX and C++/CLI. A namespace avoids name collisions between identical symbols. For example, a name collision might prevent the compiler from recognizing Context-Sensitive Keywords (C++ Component Extensions).

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:

Compiler option: /clr

Example

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);
}
Show:
© 2015 Microsoft