Annotated Ada Reference Manual (Ada 202y Draft 1) — Legal Information
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J.1 Renamings of Library Units

Static Semantics

1
The following library_unit_renaming_declarations exist: 
2
with Ada.Unchecked_Conversion;
generic function Unchecked_Conversion renames Ada.Unchecked_Conversion;
3
with Ada.Unchecked_Deallocation;
generic procedure Unchecked_Deallocation renames Ada.Unchecked_Deallocation;
4
with Ada.Sequential_IO;
generic package Sequential_IO renames Ada.Sequential_IO;
5
with Ada.Direct_IO;
generic package Direct_IO renames Ada.Direct_IO;
6
with Ada.Text_IO;
package Text_IO renames Ada.Text_IO;
7
with Ada.IO_Exceptions;
package IO_Exceptions renames Ada.IO_Exceptions;
8
with Ada.Calendar;
package Calendar renames Ada.Calendar;
9
with System.Machine_Code;
package Machine_Code renames System.Machine_Code; -- If supported.
9.a/3
Discussion: {AI05-0004-1} These library units correspond to those declared in Ada 83, which did not have the child unit concept or the parent package Ada. 

Implementation Requirements

10
The implementation shall allow the user to replace these renamings. 
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