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Annex A

(normative)

Predefined Language Environment

1
   This Annex contains the specifications of library units that shall be provided by every implementation. There are three root library units: Ada, Interfaces, and System; other library units are children of these:
2/1
      
 
Standard -- A.1
  Ada -- A.2
    Asynchronous_Task_Control -- D.11
    Calendar -- 9.6
    Characters -- A.3.1
      Handling -- A.3.2
      Latin_1 -- A.3.3
    Command_Line -- A.15
    Decimal -- F.2
    Direct_IO -- A.8.4
    Dynamic_Priorities -- D.5
    Exceptions -- 11.4.1
    Finalization -- 7.6
    Float_Text_IO -- A.10.9
    Float_Wide_Text_IO -- A.11
    Integer_Text_IO -- A.10.8
    Integer_Wide_Text_IO -- A.11
    Interrupts -- C.3.2
      Names -- C.3.2
    IO_Exceptions -- A.13
    Numerics -- A.5
      Complex_Elementary_Functions -- G.1.2
      Complex_Types -- G.1.1
      Discrete_Random -- A.5.2
      Elementary_Functions -- A.5.1
      Float_Random -- A.5.2
      Generic_Complex_Elementary_Functions
            -- G.1.2
      Generic_Complex_Types -- G.1.1
      Generic_Elementary_Functions -- A.5.1
    Real_Time -- D.8
    Sequential_IO -- A.8.1
    Storage_IO -- A.9
    Streams -- 13.13.1
      Stream_IO -- A.12.1
Standard (...continued)
  Ada (...continued)
    Strings -- A.4.1
      Bounded -- A.4.4
      Fixed -- A.4.3
      Maps -- A.4.2
        Constants -- A.4.6
      Unbounded -- A.4.5
      Wide_Bounded -- A.4.7
      Wide_Fixed -- A.4.7
      Wide_Maps -- A.4.7
        Wide_Constants -- A.4.7
      Wide_Unbounded -- A.4.7
    Synchronous_Task_Control -- D.10
    Tags -- 3.9
    Task_Attributes -- C.7.2
    Task_Identification -- C.7.1
    Text_IO -- A.10.1
      Complex_IO -- G.1.3
      Editing -- F.3.3
      Text_Streams -- A.12.2
    Unchecked_Conversion -- 13.9
    Unchecked_Deallocation -- 13.11.2
    Wide_Text_IO -- A.11
      Complex_IO -- G.1.3
      Editing -- F.3.4
      Text_Streams -- A.12.3
  Interfaces -- B.2
    C -- B.3
      Pointers -- B.3.2
      Strings -- B.3.1
    COBOL -- B.4
    Fortran -- B.5
  System -- 13.7
    Address_To_Access_Conversions -- 13.7.2
    Machine_Code -- 13.8
    RPC -- E.5
    Storage_Elements -- 13.7.1
    Storage_Pools -- 13.11

Implementation Requirements

3
   The implementation shall ensure that each language defined subprogram is reentrant in the sense that concurrent calls on the same subprogram perform as specified, so long as all parameters that could be passed by reference denote nonoverlapping objects.

Implementation Permissions

4
   The implementation may restrict the replacement of language-defined compilation units. The implementation may restrict children of language-defined library units (other than Standard).

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