On 10/17/16 9:42 AM, Edwin van Leeuwen wrote:
On Monday, 17 October 2016 at 13:35:12 UTC, Steven Schveighoffer wrote:
Why not something like this:
Val get(T, Val)(auto ref T item, string memberName, Val defaultValue)
{
switch(memberName)
{
foreach(n; __traits(allMembers, T))
{
static if(is(typeof(__traits(getMember, item, n)) : Val))
case n: mixin("return item." ~ n ~ ";");
}
default:
return defaultValue;
}
}
I like the general solution, although I probably would just expect it to
fail compiling if no member is present or return Val.init if no
defaultValue is passed.
Hm... this could work:
Val get(Val, T)(auto ref T item, string memberName, Val defaultValue =
Val.init)
int x = t.get("a", 1);
int x = t.get!int("a");
-Steve
