# Test string interpolation
let
  name = "world";
  x = 42;
  bool_val = true;
in {
  # Simple interpolation
  greeting = "Hello ${name}!";

  # Multiple interpolations
  multi = "x is ${x} and name is ${name}";

  # Expression evaluation in interpolation
  computed = "x + 10 = ${x + 10}";

  bool_check = "${bool_val} is true!";

  # Just a string, no interpolation
  plain = "plain text";
}