• Cheng Wei <rivercheng gmail.com> Sep 23 2011
• Tobias Pankrath <tobias pankrath.net> Sep 23 2011
• "Jonathan M Davis" <jmdavisProg gmx.com> Sep 23 2011

Cheng Wei <rivercheng gmail.com> writes:

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.

Tobias Pankrath <tobias pankrath.net> writes:

 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";

"Jonathan M Davis" <jmdavisProg gmx.com> writes:

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