How to iterate getSymbolsByUDA

[Stanislav Blinov]

On Saturday, 24 November 2018 at 03:48:12 UTC, Eko Wahyudin wrote:
> Hi all,
> anyone know how to iterate getSymbolsByUDA ?

enum Attr;
struct A
{
     @Attr int a;
     int b;

     @Attr void foo() {}
     @Attr void foo(int) {}
}

void main() {
     import std.traits;
     import std.stdio;

     alias symbols = getSymbolsByUDA!(A, Attr);

     A a;

     static foreach (i; 0 .. symbols.length) {
         writeln("identifier: ", __traits(identifier, symbols[i]));
         static if (is(typeof(symbols[i]) == int)) {
             __traits(getMember, a, __traits(identifier, 
symbols[i])) = 42;
         }
     }

     assert(a.a == 42);
}