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    Delphi Error – E2520 Result type of operator ‘%s’ must be Boolean type

    admin November 17, 2022 No Comments

    Delphi Compiler Error

    E2520 Result type of operator ‘%s’ must be Boolean type

    Reason for the Error & Solution

    This occurs when the return type is expected to be Boolean but it’s not. 

    program E2520;
{E2517 Operator '%s' must take %d parameter(s)}
{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  TGenRec = record
    class operator False( b: TGenRec): integer; //E2520
end;
begin

end.

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