35 lines
687 B
Ada
35 lines
687 B
Ada
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-- { dg-do run }
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-- { dg-options "-gnatws" }
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with Ada.Unchecked_Conversion;
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procedure Unchecked_Convert1 is
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type Byte is mod 2**8;
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type Stream is array (Natural range <>) of Byte;
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type Rec is record
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I1, I2 : Integer;
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end record;
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function Do_Sum (R : Rec) return Integer is
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begin
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return R.I1 + R.I2;
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end;
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function Sum (S : Stream) return Integer is
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subtype Chunk is Stream (1 .. Rec'Size / 8);
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function To_Chunk is new Ada.Unchecked_Conversion (Chunk, Rec);
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begin
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return Do_Sum (To_Chunk (S(S'First .. S'First + Rec'Size / 8 - 1)));
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end;
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A : Stream (1..9) := (others => 0);
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I : Integer;
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begin
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A (9) := 1;
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I := Sum (A(1..8));
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end;
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