Ruby embedded into D. compile: dmd rbd.d -L-L/path/to/ruby/lib -L-lruby.2.6

rbd.d

/*
  Ruby embedded into D.
  compile: dmd rbd.d -L-L/path/to/ruby/lib -L-lruby.2.6
    Example... dmd rbd.d -L-L/usr/local/opt/ruby/lib -L-lruby.2.6
*/

import std.stdio,
       std.string;

extern (C) {
  void ruby_init();
  int ruby_cleanup(int);
  int rb_eval_string_protect(const char*, int*);
}

static this() {
  ruby_init();
}

static ~this() {
  ruby_cleanup(0);
}

void ruby(string rb_code)() {
  int state;
  rb_eval_string_protect(rb_code.toStringz, &state);

  if (state) {
    throw new Exception("Some Error");
  }
}

void main() {
  ruby!q{
    puts "Hello, Ruby world! This is invoked by D"
  };
}