Legality Rules
 (1)
 The argument N used in the attribute_designators for the Nth dimension
of an array shall be a static expression of some integer type. The value of
N shall be positive (nonzero) and no greater than the dimensionality of the
array.
Static Semantics
 (2)
 The following attributes are defined for a prefix A that is of an array
type (after any implicit dereference), or denotes a constrained array
subtype:
 (3)
 A'First
A'First denotes the lower bound of the first index range; its
type is the corresponding index type.
 (4)
 A'First(N)
A'First(N) denotes the lower bound of the Nth index range;
its type is the corresponding index type.
 (5)
 A'Last
A'Last denotes the upper bound of the first index range; its
type is the corresponding index type.
 (6)
 A'Last(N)
A'Last(N) denotes the upper bound of the Nth index range;
its type is the corresponding index type.
 (7)
 A'Range
A'Range is equivalent to the range A'First .. A'Last, except
that the prefix A is only evaluated once.
 (8)
 A'Range(N)
A'Range(N) is equivalent to the range A'First(N) ..
A'Last(N), except that the prefix A is only evaluated once.
 (9)
 A'Length
A'Length denotes the number of values of the first index
range (zero for a null range); its type is universal_integer.
 (10)
 A'Length(N)
A'Length(N) denotes the number of values of the Nth index
range (zero for a null range); its type is universal_integer.
Implementation Advice
 (11)
 An implementation should normally represent multidimensional arrays in rowmajor
order, consistent with the notation used for multidimensional array aggregates
(see 4.3.3). However, if a pragma Convention(Fortran,
...) applies to a multidimensional array type, then columnmajor order should
be used instead (see B.5, ``Interfacing with Fortran'').

 (12)
(45) The attribute_references A'First and A'First(1) denote the same
value. A similar relation exists for the attribute_references A'Last,
A'Range, and A'Length. The following relation is satisfied (except for
a null array) by the above attributes if the index type is an integer
type:
(13)
A'Length(N) = A'Last(N)  A'First(N) + 1
 (14)
(46) An array type is limited if its component type is limited (see
7.5).
 (15)
(47) The predefined operations of an array type include the membership
tests, qualification, and explicit conversion. If the array type is not
limited, they also include assignment and the predefined equality
operators. For a onedimensional array type, they include the
predefined concatenation operators (if nonlimited) and, if the component
type is discrete, the predefined relational operators; if the component
type is boolean, the predefined logical operators are also included.
 (16)
(48) A component of an array can be named with an indexed_component. A
value of an array type can be specified with an array_aggregate, unless
the array type is limited. For a onedimensional array type, a slice of
the array can be named; also, string literals are defined if the
component type is a character type.
Examples
 (17)
 Examples (using arrays declared in the examples of subclause 3.6.1):
(18)
 Filter'First = 0 Filter'Last = 31 Filter'Length =32
 Rectangle'Last(1) = 20 Rectangle'Last(2) = 30
 Email comments, additions, corrections, gripes, kudos, etc. to:
Magnus Kempe  Magnus.Kempe@di.epfl.ch
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