AST.Enumr.GetEnumerator C# (CSharp) Метод

        public Tuple<Env, String, Int32> GetEnumerator(Env env, Int32 idx) {
            if (this.Init.IsNone) {
                return new Tuple<Env, String, Int32>(env, this.Name, idx);
            }

            ABT.Expr init = this.Init.Value.GetExpr(env);

            init = ABT.TypeCast.MakeCast(init, new LongType());
            if (!init.IsConstExpr) {
                throw new InvalidOperationException("Error: expected constant integer");
            }
            Int32 initIdx = ((ConstLong)init).Value;

            return new Tuple<Env, String, int>(env, this.Name, initIdx);
        }
    }