Annotated Ada Reference Manual — Legal Information

A.18.10 The Package Containers.Indefinite_Vectors

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{AI95-00302-03} The language-defined generic package Containers.Indefinite_Vectors provides a private type Vector and a set of operations. It provides the same operations as the package Containers.Vectors (see A.18.2), with the difference that the generic formal Element_Type is indefinite.

Static Semantics

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{AI95-00302-03} The declaration of the generic library package Containers.Indefinite_Vectors has the same contents as Containers.Vectors except:

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The generic formal Element_Type is indefinite.

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The procedures with the profiles:

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procedure Insert (Container : in out Vector;
Before : in Extended_Index;
Count : in Count_Type := 1);

procedure Insert (Container : in out Vector;
                  Before    : in     Cursor;
                  Position  :    out Cursor;
                  Count     : in     Count_Type := 1);

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are omitted.

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Discussion: These procedures are omitted because there is no way to create a default-initialized object of an indefinite type. Note that Insert_Space can be used instead of this routine in most cases. Omitting the routine completely allows any problems to be diagnosed by the compiler when converting from a definite to indefinite vector.

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The actual Element parameter of access subprogram Process of Update_Element may be constrained even if Element_Type is unconstrained.

Extensions to Ada 95

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{AI95-00302-03} {extensions to Ada 95} The generic package Containers.Indefinite_Vectors is new.