package body System.Bit_Ops is
subtype Bits_Array is System.Unsigned_Types.Packed_Bytes1 (Positive);
- -- Unconstrained array used to interprete the address values. We use the
+ -- Dummy array type used to interpret the address values. We use the
-- unaligned version always, since this will handle both the aligned and
-- unaligned cases, and we always do these operations by bytes anyway.
-- Note: we use a ones origin array here so that the computations of the
-- length in bytes work correctly (give a non-negative value) for the
- -- case of zero length bit strings).
+ -- case of zero length bit strings). Note that we never allocate any
+ -- objects of this type (we can't because they would be absurdly big).
type Bits is access Bits_Array;
-- This is the actual type into which address values are converted
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