On 7/14/17 1:51 PM, FoxyBrown wrote:
Trying to do some tricky stuff but I can't seem to get the value of a
type(enum in my case, but must work in general).
Basically, given a type T or an alias T(alias preferred), I'd like to be
able to get the "default value" of that type.
e.g.,
if it is an enum and I have an alias to a member, instead of (Enum)3 I
want 3.
if it is a member field, I want the default value.
if it is a function pointer, the address(probably 0, but whatever).
Basically a sort of generic "getValue" that attempts to get the CT value
of any type, if it exists. (obviously the value of class is meaningless,
so returns ""... class isn't even a type, but can still query).
In fact, I'd like to also naturally resolve the value back in to the
expression that created it.
e.g.,
(Enum)3 -> Enum.ThirdEntry
.init is the default value.
I'm not sure you can get the default value of a non-default initializer,
My attempts using init didn't work. e.g.:
void foo(alias T)()
{
pragma(msg, T.init);
}
struct S
{
int y = 5;
void bar() { foo!y; } // prints 0
}
-Steve
