The Programming Language Ada Reference Manual American by (auth.)

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O and the next model number above, for the subtype T. The value of this attribute is of the type universal_real. T'EMAX Yields the targest exponent value in the binary canonical form of model numbers of the subtype T. (This attribute yields the product 4 . B of section 3,5,7,) The value of this attribute is of the type universal_integer, T'SMALL Yields the smallest positive {nonzero) model number of the subtype T. The value of this attribute is of the type universal_reaL T'LARGE Yields the largest positive model number of the subtype T.

If the type of an object is a composite type, the implicit initial value of each component that has a default expression is obtained by evaluation of this expression, unless the component is a discriminant of a constrained object (the previous case), In the case of a component that is itself a composite object and whose value is defined neither by an explicit initialization nor by a default expression, any implicit initial values for components of the composite object are defined by the same rules as for a declared object.

6. • For each enumeration literal or preclefined operator of the parent type there is a corresponding operation for the derived type. • If the parent type is a task type, then for each entry of the parent type there is a corresponding entry for the derived type. • if a default expression exists for a component of an object having the parent type, then the same default expression is used for the corresponding component of an object having the derived type. 4 Derived TyPes 3-10 Declarations and Types 31 • If the parent type is an access type, then the parent and the derived type share the same collection; there is a null access value for the derived type and it is the default initial value of that type.

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