File: unchecked_convert7.adb

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (36 lines) | stat: -rw-r--r-- 653 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
-- { dg-do compile }
-- { dg-options "-g -gnatVa" }

with Unchecked_Conversion;

procedure Unchecked_Convert7 is

  type BPA is array (1 .. 23) of Boolean;
  pragma Pack (BPA);
  for BPA'Size use 23;

  subtype Byte is Natural range 0 .. 255;

  type R is
    record
      S : Boolean;
      E : Byte;
      F : BPA;
    end record;

  for R use
    record
      S at 0 range 0 .. 0;
      E at 0 range 1 .. 8;
      F at 0 range 9 .. 31;
    end record;
  for R'Size use 32;

  function Conversion
    is new Unchecked_Conversion (Source => R, Target => Float);

  F : Float := Conversion (R'(False, Byte'Last, (others => False)));

begin
  null;
end;