Data access

Accesses can be used to retrieve a value (in parameters or in variables when they already have a value, i.e. in the output section), or to impose constraints on variables.

Identifier access

<ident>

Array index access

<
    <ident>
    | <entityAttrAccess>
    | <arrayIndexAccess>
> [<int_expr>]

Matrix row access

BUP allows generating a list by accessing a row of a matrix using the operator _, for example varsX[_][1].

<
    <ident>
    | <entityAttrAccess>
    | <arrayIndexAccess>
> [_] <[<int_expr>]>*

Entity attribute access

<
    <ident>
    | <entityAttrAccess>
    | <arrayIndexAccess>
>.<ident>