import std.stdio;
immutable HELLO = "hello";

void main() {
     auto string = "hello";
     switch(string) {
          case HELLO:
              writeln("hello");
              break;
          default:
              writeln("unknown");
              break;
     }
}

testCase.d(7): Error: case must be a string or an integral constant,
not HELLO

If immutable cannot be used, what else can be used to replace #define in C?

Thanks a lot.

> If immutable cannot be used, what else can be used to replace #define in C?
> 
> Thanks a lot.

immutables are runtime constants. For case you need a compile time constant, which you can define with enum.

enum string mycase = "value";

On Friday, September 23, 2011 01:38 Tobias Pankrath wrote:
> > If immutable cannot be used, what else can be used to replace #define in C?
> > 
> > Thanks a lot.
> 
> immutables are runtime constants. For case you need a compile time constant, which you can define with enum.
> 
> enum string mycase = "value";

Or you could even reduce it to

enum mycase = "value";

- Jonathan M Davis