On Mon, 26 Sep 2011 15:57:21 -0400, Jonathan Crapuchettes <jcrapuchet...@gmail.com> wrote:

Thank you for the thought, but the problem here is that the file containing the strings is only known at runtime from a command line argument. I also have some global strings that need to be set from the database.

Thank you again,
JC


Hm... interesting situation.

The issue is, you want them to be immutable at some arbitrary point in time, NOT before main is run.

With D the way it is, I think you are better off encapsulating that as private mutable storage backing public accessors:

module mystringdata;

private shared /* or __gshared */ string _mystringvalue = null;

void initializeStrings(dbconnection db, someFileSource f) // call this before using any of the strings
{
 // read the string from the db/file
  _mystringvalue = db.read("mystringdata");
  ...
}

@property string mystringvalue()
{
   assert(_mystringvalue !is null); // ensure it's valid before being used.
   return _mystringvalue;
}

// repeat for other values.

Otherwise, you could potentially circumvent the type system, but that results in undefined behavior. I don't know how well that would work, but it might solve the problem for the current compiler implementation.

-Steve

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