Format

      { arithmetic-expr      }
      { builtin-expr         }
      { case-expr            }
      {                      }
      { char-string-literal  }
      { concatenated-expr    }
      { external-literal     }
      {                      }
      { field-or-record-expr }
      { first-from-expr      }
      { numeric-literal      }
      {                      }
      { statistical-expr     }