================================================================================
Delays, boxes, durations and stretches
================================================================================

duration d = 100ns;
stretch g;
delay[d] q[0];
delay[1.5us] q;
box[200ns] {
  delay[g] q[0];
  h q[1];
}
box {
  x q[0];
}
duration span = durationof({
  x q[2];
});
rx(pi)[50dt] q[0];

--------------------------------------------------------------------------------

(source_file
  (classical_declaration
    (scalar_type)
    (identifier)
    (timing_literal))
  (classical_declaration
    (scalar_type)
    (identifier))
  (delay_statement
    (designator
      (identifier))
    (operand_list
      (indexed_identifier
        (identifier)
        (index
          (integer_literal)))))
  (delay_statement
    (designator
      (timing_literal))
    (operand_list
      (indexed_identifier
        (identifier))))
  (box_statement
    (designator
      (timing_literal))
    (scope
      (delay_statement
        (designator
          (identifier))
        (operand_list
          (indexed_identifier
            (identifier)
            (index
              (integer_literal)))))
      (gate_call
        (identifier)
        (operand_list
          (indexed_identifier
            (identifier)
            (index
              (integer_literal)))))))
  (box_statement
    (scope
      (gate_call
        (identifier)
        (operand_list
          (indexed_identifier
            (identifier)
            (index
              (integer_literal)))))))
  (classical_declaration
    (scalar_type)
    (identifier)
    (durationof_expression
      (scope
        (gate_call
          (identifier)
          (operand_list
            (indexed_identifier
              (identifier)
              (index
                (integer_literal))))))))
  (gate_call
    (identifier)
    (argument_list
      (identifier))
    (designator
      (timing_literal))
    (operand_list
      (indexed_identifier
        (identifier)
        (index
          (integer_literal))))))