Re: renames usage

[DrPi <314@drpi.fr>]

Le 31/12/2020 à 13:10, John Perry a écrit :
> No. Assignment copies the object, and changes to the copy don't affect the original, while renaming obtains a reference to the object. This program will illustrate it:
> 
> with Ada.Text_IO; use Ada.Text_IO;
> 
> procedure Test_Renames is
> 
>     S: String := "hello world";
>     T: String := S;
>     U: String renames S;
> 
> begin
> 
>     Put_Line(S);
> 
>     T(T'First) := 'y';
>     Put_Line(S); -- still "hello world"
> 
>     U(U'First) := 'y';
>     Put_Line(S); -- "yello world"
> 
> end Test_Renames;
> 

Understood. Thanks.