Re: Assigning to Element of Array of Records Doesn't Seem to Work

Bill Wood <[email protected]> writes:

> I'm just trying to assign to a field of a record in a one-dimensional
> array of records, but I get this incomprehensible message:


>    The form on the left hand side of an assignment must be a single
>       variable, a Tuple of variables or a reference to an entry in an
>       object supporting the setelt operation.

ys(2) is not a single variable, nor a Tuple of variables, but I guess it should
go through as a reference to an entry in an object supporting setelt.  Well,
currently it does not. Thus,

> What do I have to do to set the fields of the records to desired
> values???

use a temporary variable:

(4) -> el := ys(2)

   (4)  [k= 0,rad= 0]
                                        Type: Record(k: Integer,rad: Integer)
(5) -> el.k := 10

   (5)  10
                                                        Type: PositiveInteger
(6) -> ys

   (6)  [[k= 0,rad= 0],[k= 10,rad= 0],[k= 0,rad= 0]]
                    Type: OneDimensionalArray Record(k: Integer,rad: Integer)

Martin