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    Delphi Error – E2571 Type parameter ‘%s’ doesn’t have class or interface constraint

    admin November 17, 2022 No Comments

    Delphi Compiler Error

    E2571 Type parameter ‘%s’ doesn’t have class or interface constraint

    Reason for the Error & Solution

    This occurs when the type constraint is not an interface or class type. 

    program E2571;
{E2571 Type parameter '%s' doesn't have a class or interface constraint}

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
 MyRec<T> = record
    a: array [1..T] of Logint;
 end;

begin

end.

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