A.18.1 The Package Containers
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The package Containers is the root of the containers
subsystem. Static Semantics
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The library package Containers has the following
declaration: 3/2
package Ada.Containers is
pragma Pure(Containers);
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type Hash_Type is mod implementation-defined;
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type Count_Type is range 0 .. implementation-defined;
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end Ada.Containers;
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Hash_Type represents the range of the result of
a hash function. Count_Type represents the (potential or actual) number
of elements of a container. 7.a/2
Implementation defined:
The value of Containers.Hash_Type'Modulus.
The value of Containers.Count_Type'Last.
Implementation Advice
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Hash_Type'Modulus should be at least 2**32. Count_Type'Last
should be at least 2**31–1. 8.a/2
Implementation Advice:
Containers.Hash_Type'Modulus should
be at least 2**32. Containers.Count_Type'Last should be at least 2**31–1.
8.b/2
Discussion: This
is not a requirement so that these types can be declared properly on
machines with native sizes that are not 32 bits. For instance, a 24-bit
target could use 2**24 for Hash_Type'Modulus.
Extensions to Ada 95
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{extensions to Ada 95} The
package Containers is new.
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