Constants (C++/CLI and Delphi Prism Cross Reference Guide)

C++/CLI supports the const and static const keywords of standard C++ as well as the new literal keyword. A literal is equivalent to static const in standard C++ and Microsoft's documentation recommends to replace static const with the new literal keyword because a literal is available in metadata; a static const variable is not available in metadata to other compilers.

You can use static const within the class declaration or locally within a method. However, literal is only valid in the class declaration section and const is only valid within a method.

Syntax Example:   //some method { const String^ MyName = "John"; static const Int32 MyAge = 27; //} // public class SomeClass : public Object { public:   literal double Pi = 3.14159;   literal String^ MyName = "Mike";   static const Int32 MyAge = 35; //...

 Ref: http://msdn.microsoft.com/en-us/library/ms235301(VS.80).aspx

In Prism, you define constants similar to how you define variables but use the Const keyword instead of the Var keyword. Specifying the type is optional. If you don't specify the type, the compiler chooses the most appropriate type for you.

Declare class constants as part of the class definitions. Declare local constants above the begin..end. Although Prism support inline variables, inline constants are not supported.

//Specified type:
const
  kFeetToMeter: Double = 3.2808; 

  kMeterToFeet: Double = .3048; 

  kName: String = "Mike";
 
//Unspecified type:

const kPIShort = 3.14;

 Delphi Prism Constants (const kPI: Double=3.1459;)