On 03/27/2013 12:08 PM, Steven Schveighoffer wrote:
On Wed, 27 Mar 2013 11:34:19 -0400, Vidar Wahlberg
<vidar.wahlb...@gmail.com> wrote:
- When casting a value to an enum, there's no checking that the value
actually is a valid enum value. Don't think I ever found a solution on
how to check whether the value after casting is a valid enum value, it
hasn't been a pressing issue.
Typically, one uses std.conv.to to safely convert one value into
another. Cast should be avoided unless absolutely necessary.
I just tested it, it works on enum *strings*, but not enum *values*
For example:
import std.conv;
enum X {
i, j, k
}
void main()
{
X x = to!X("i"); // works!
x = to!X(1); // fails!
}
I think to should be able to do this, but I'm not a good enough guru
with templates and compile-time type info to know if it's possible.
Anyone know if this is possible? If so, I think it should be added.
-Steve
It also works on values....
enum A
{
B,
C,
D,
}
int w;
import std.conv;
import std.stdio;
void main()
{
auto t = w.to!A.B;
writeln(t);
}