PowerAda 19
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(19) What combinations of small, range, and digits are supported for fixed point types.
See 3.5.9(10).
Any combination of small and range such that the mantissa for the type is no greater than 31 where mantissa is computed as follows:
bound = max( abs(lower bound), abs(upper bound));
bound - 1
mantissa := log ( 1 + ( --------- ) );
2 small
Decimal_fixed_point_definitions using a digits specification are not yet implemented, but can be achieved by setting the small and delta of a fixed point type equal to a power of 10, and providing a range specification that satisfies the above conditions.