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(Under construction.)
type
PtrDiffType { built-in type }
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`PtrDiffType' is a (signed) integer type to represent the difference between two positions in memory. It is not needed except for rather low-level purposes.
program PtrDiffTypeDemo;
var
a: array [1 .. 10] of Integer;
d: PtrDiffType;
p, q: Pointer;
begin
p := @a[1];
q := @a[4];
{$X+}
d := q - p
end.
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