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var
  CurrentLineNumber: Integer;

procedure MyAssertErrorProc(const Message, Filename: String; LineNumber: Integer; ErrorAddr: Pointer);
begin
  CurrentLineNumber:=LineNumber;
end;
 
[...]
  if ... then
    begin Assert(false); TextOutPut(CurrentLineNumber, s, ...); end;
[...]					

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 if ... then
    TextOutPut(Assert(0=1), s, ...);					

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LogCurrent(procedure begin Assert(False) end, 'Logstring');					

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type
  EAssertionFailedEx = class(EAssertionFailed)
  private
    FFilename: string;
    FMessage: string;
    FLineNumber: Integer;
    FErrorAddr: Pointer;
  public
    constructor Create(const AMessage, AFilename: string; ALineNumber: Integer; AErrorAddr: Pointer);
    property Message: string read FMessage write FMessage;
    property Filename: string read FFilename write FFilename;
    property LineNumber: Integer read FLineNumber write FLineNumber;
    property ErrorAddr: Pointer read FErrorAddr write FErrorAddr;
  end;

{ EAssertionFailedEx }

constructor EAssertionFailedEx.Create(const AMessage, AFilename: string; ALineNumber: Integer; AErrorAddr: Pointer);
begin
  inherited Create(AMessage);
  FMessage := AMessage;
  FFilename := AFilename;
  FLineNumber := ALineNumber;
  FErrorAddr := AErrorAddr;
end;

procedure AssertionFailed(const Message, Filename: string; LineNumber: Integer; ErrorAddr: Pointer);
begin
  raise EAssertionFailedEx.Create(Message, Filename, LineNumber, ErrorAddr);
end;

procedure LogCurrent(const AAssertProcedure: TProc; const ALogText: String);
begin
  try
    AAssertProcedure;
  except
    on E: EAssertionFailedEx do
      ShowMessage('Logeintrag:'#13#10 + E.Message + #13#10 + E.Filename + #13#10 + IntToStr(E.LineNumber));
  end;
end;

procedure TForm53.FormCreate(Sender: TObject);
begin
  AssertErrorProc := AssertionFailed;
  LogCurrent(procedure begin Assert(False) end, 'Logstring');
end;					

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  {$DEFINE __PROFENTER:=uutlEmbeddedProfiler.ProfilerEnterProc(Get_pc_addr); try}
  {$DEFINE __PROFLEAVE:=finally uutlEmbeddedProfiler.ProfilerLeaveProc; end;}					

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    i:= fAddressCache.IndexOf(Events[WritePtr].Func);
    if i<0 then begin
      ce.Name:= '';
      ce.Line:= 0;
      ce.Src:= '';
      GetLineInfo(Events[WritePtr].Func,ce.Name,ce.Src,ce.Line);
      fAddressCache.Add(Events[WritePtr].Func, ce);
    end else
      ce:= fAddressCache.Data[i];