On Thursday, 20 March 2014 at 16:28:46 UTC, Chris wrote:
How can I instantiate Person with Trait, i.e. a template with a
template?
struct Trait(T0, T1) {
T0 name;
T1 value;
T1[T0] map;
this(T0 name, T1 value) {
this.name = name;
this.value = value;
map[name] = value;
}
}
class Person(T) {
T traits[];
void addTrait(T trait) {
traits ~= trait;
}
}
void main()
{
auto trait1 = Trait!(string, string)("Name", "John");
auto trait2 = Trait!(string, int)("Age", 42);
writefln(%s", trait1.map);
writefln(%s", trait2.map);
// above code compiles and works
}
templates can be passed to templates as alias parameters, or as
part of a TemplateArgumentTuple. See
http://dlang.org/template.html#aliasparameters
