Tuples and compile-time assigned properties

[Artur Skawina]

On 09/19/13 16:40, Joseph Rushton Wakeling wrote:
>     alias EdgeProperties = Tuple!(double, "weight");
> 
>     alias VertexProperties = Tuple!(size_t, "colour", string, "name");
> 
> So then, you'd be able to extract the list of variable names and types at compile time and use them to create the underlying data structures required; and similarly you'd be able to create a set of public interfaces that gives you access to those members.
> 
> With that in mind, there are a number of potential issues that arise:
> 
>    (i) is there a compile-time constraint via which I can insist that every
>        member of the tuple must be named?
> 
>   (ii) is there an easy way to extract all the names of tuple members as an
>        array of strings?
> 
> Can anyone advise?

I'm not sure i understand your problem, but you could use structs. ie:

   struct VertexProperties {
      size_t color;
      string name;
   }

You can get the field names and types at CT and work with that.


artur