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Annotated Ada Reference Manual (Ada 2022 with Amendment 1) — Legal Information
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J.15.3 Pragma Pack

Syntax

1/3
{AI05-0229-1} The form of a pragma Pack, which is a representation pragma (see 13.1), is as follows:
2/3
  pragma Pack (first_subtype_local_name);

Legality Rules

3/3
{AI05-0229-1} The first_subtype_local_name of a pragma Pack shall denote a composite subtype. 

Static Semantics

4/3
{AI05-0229-1} Pragma Pack specifies that the Pack aspect (see 13.2) for the type denoted by first_subtype_local_name has the value True. 

Wording Changes from Ada 2005

4.a/3
{AI05-0229-1} {AI05-0299-1} This subclause is new. Pragma Pack was moved here from 13.2; aspect Pack lives there now. 
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