Extended rows operators (The GNU Algol 68 Compiler)

### 7.3 Extended rows operators ¶

The following operators work on any row mode, denoted below using the pseudo-mode `rows`.

Operator: elems `= (rows a) int` ¶

  Monadic operator that yields the number of elements implied by the first bound pair of the descriptor of the value of `a`.

Operator: elems `= (int n, rows a) int` ¶

  Dyadic operator that yields the number of elements implied by the n-th bound pair of the descriptor of the value of `a`.