Internal error from DMD

[Chris Nicholson-Sauls]

Bradley Smith wrote:
> Jarrett Billingsley wrote:
> 
>> Sure.  Just wondering what you're trying to store?  There might be a 
>> simpler way to store it, whatever it is; I've personally never had to 
>> use boxes, though maybe you're coming from a dynamically typed 
>> background.
> 
> 
> I'm experimenting with converting some Java code to D, and the code 
> stores int, boolean, and String data in a list through the Integer and 
> Boolean wrapper objects. Using the D boxer is the only way I've found to 
>  create a heterogeneous array which includes primitive data elements.
> 
> Perhaps the need for boxing could be eliminated by making the code more 
> D-like, but at this point, I'm only trying a straight translation.
> 
>   Bradley

Well, if it only ever works with those three types, you could go with a Var struct.

# enum VarType { Int, Bool, String }
#
# struct Var {
#   VarType type ;
#
#   union {
#     bool   b ;
#     int    i ;
#     char[] s ;
#   }
# }
#
# Var[] array;

You can simplify creation of Var structs with a set of static call operators, like such:

# struct Var {
#   // ...
#   static Var opCall (bool value) {
#     Var var ;
#
#     var.type = VarType.Bool ;
#     var.b    = value        ;
#
#     return var;
#   }
# }

While it isn't /the/ most elegant solution possible, its tried and true, and pretty 
effective for definite sets of types.

-- Chris Nicholson-Sauls