On Thursday, 29 October 2015 at 15:14:13 UTC, Shammah Chancellor
wrote:
On Thursday, 29 October 2015 at 06:02:05 UTC, qsdf wrote:
On Thursday, 29 October 2015 at 02:43:59 UTC, Shammah
Chancellor wrote:
....
I agree with you on an aspect: writing code with __traits()
often leads to a cascade of "unfriendly", "cryptic",
"undigest", static if and loops.
However your examples are discutables:
1/ The symbol is not always a type, so to test it there is
`if(is()){}`:
---
import std.stdio;
enum hack(A...) = A;
int main() {
foreach(member; __traits(allMembers, std.stdio)) {
pragma(msg, member);
static if (is(member))
alias sym = hack!(__traits(getMember, std.stdio,
member))[0];
}
}
---
The point is that you cannot use is() without first using
getMember, but using __traits(getMember) before
__traits(compiles) generates an error. In your example you're
trying to use `is` on a string, which does not work.
```
Right. I forgot to put the pragma message into the compile-time
branch and I've been cheated by all the member list printed in
the console...Gotta sleep before writing more craps.
