Re: How do I set a class member value by its name in a string?

[Mengu via Digitalmars-d-learn]

On Wednesday, 27 December 2017 at 21:39:49 UTC, Mengu wrote:

On Wednesday, 27 December 2017 at 20:54:17 UTC, bitwise wrote:

[...]

there's also a simple workaround for fields with the same type: https://run.dlang.io/is/dsFajq

import std.stdio;

struct S {
  int x;
  int y;
}

auto setValue(ref S s, string field, int value) {
  foreach (fieldName; __traits(allMembers, S)) {
    if (fieldName == field) {
      __traits(getMember, s, fieldName) = value;
      break;
    }
  }
}

void main() {
  S s;
  s.setValue("x", 5);
  s.setValue("y", 25);
  writeln(s);
}

you can play with it to make it more generic. you can also create a mixin template that would generate setters for each field you would need a setter for and then in the run time you'd just be able to call them.

return type should just be void. that's just my muscle memory. :-D