Ada Reference Manual (Ada 2022) — Legal Information

# 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:
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package Ada.Containers
with Pure is
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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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Capacity_Error : exception;
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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.
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Capacity_Error is raised when the capacity of a container is exceeded.

#### 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.

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