Compile-time reflection

Having built-in JSON support is nice, but V also allows you to create efficient serializers for any data format. V has compile-time if and for constructs:

  1. struct User {
  2.     name string
  3.     age  int
  4. }
  6. fn main() {
  7.     $for field in User.fields {
  8.         $if field.typ is string {
  9.             println('$field.name is of type string')
  10.         }
  11.     }
  12. }
  14. // Output:
  15. // name is of type string

See examples/compiletime/reflection.v for a more complete example.