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

Delphi 34 Views 1 Min Read

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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