On 09/19/13 17:22, Joseph Rushton Wakeling wrote:
> On 19/09/13 16:55, Artur Skawina wrote:
>> 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.
>
> Yes, that's a good suggestion. I guess I was thinking that it'd be easier to
> do something like
>
> auto g = Graph!(Tuple!(double, "weight"), Tuple!(size_t, "colour",
> string, "name"));
>
> ... than to force the user to define a struct up front and pass it as
> template parameter.
Yeah, support for anonymous structs as template parms would be useful;
auto g = Graph!(struct { double weight; size_t color; string name });
But that's not currently possible.
You can do something like:
auto g = Graph!q{ double weight; size_t color; string name; };
then, inside the Graph template:
// template Graph(string F, ...) {
struct S { mixin (F); }
// ...look at fields of 'S'...
(This will work if you only need builtin types and/or custom ones already
available in the Graph template)
artur
