Ошибка e2003 undeclared identifier - Не ошибается лишь тот, кто ничего не делает!

In this code:

uses 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, 
  Forms, Dialogs, IdBaseComponent, IdComponent, IdTCPConnection, 
  IdTCPClient, IdIOHandler, IdGlobal, StdCtrls;

function WaitForCommand(args: Pointer): Cardinal; stdcall;
begin
  while client.Connected do
    if not HandleResponse(client.IOHandler) then
      break;
  Result := 0;
end;

I have this error:

[DCC Error] Unit1.pas(159): E2003 Undeclared identifier: ‘HandleResponse’

Источник

Это не феномен. Просто ключевое слово type надо использовать в секции interface, а не implementation. А уже реализацию методов делать в implementation.

Вот так оно бывает

Добавлено через 3 минуты

Сообщение от northener

Гложат меня смутные сомнения. А знали ли вы хотя бы

мининимально

основы Дельфи/Паскаля хоть когда-нибудь?

Невнимательность.

В прочем, со всеми бывает.

Добавлено через 2 часа 54 минуты
Согласитесь, можно было бы обойтись и без хейтеров.

Nanotentacle, Был невнимателен.

Действительно, какого хрена в реализации, я декларировал класс.

Добавлено через 9 минут
Была ситуация, когда совсем незаметно в тексте был добавлен символ «`»

Пол дня искал, в чем дело.
Это кот нажал лапой и все испортил.

northener, Интересно, а чем интересуетесь вы?

Дайте пофантазировать, вам же можно.

Наверное юзаете всякое старье, копаетесь в грязном белье.
По вечерам, чешите свой волосатый пупок?
А после даёте дельные советы на формах?

Это моя фантазия, не более.

Источник

Delphi Compiler Error

E2003 Undeclared identifier ‘%s’

Reason for the Error & Solution

The compiler could not find the given identifier – most likely it has been misspelled either at the point of declaration or the point of use. It might be from another unit that has not mentioned a uses clause.

program Produce;
var
  Counter: Integer;
begin
  Count := 0;
  Inc(Count);
  Writeln(Count);
end.

In the example, the variable has been declared as “Counter”, but used as “Count”. The solution is to either change the declaration or the places where the variable is used.

program Solve;
var
  Count: Integer;
begin
  Count := 0;
  Inc(Count);
  Writeln(Count);
end.

In the example we have chosen to change the declaration – that was less work.

Источник

Go Up to Error and Warning Messages (Delphi)

The compiler could not find the given identifier — most likely it has been misspelled either at the point of declaration or the point of use. It might be from another unit that has not mentioned a uses clause.

program Produce;
var
  Counter: Integer;
begin
  Count := 0;
  Inc(Count);
  Writeln(Count);
end.

In the example, the variable has been declared as «Counter», but used as «Count». The solution is to either change the declaration or the places where the variable is used.

program Solve;
var
  Count: Integer;
begin
  Count := 0;
  Inc(Count);
  Writeln(Count);
end.

In the example we have chosen to change the declaration — that was less work.

Источник

E2003 Undeclared identifier ‘ShortDateFormat’ error in Delphi XE3 or later versions

E2003 Undeclared identifier ‘ShortDateFormat’ error in Delphi XE3 or later versions

When we upgrade a Delphi old version application to Delphi XE3 or latest one then if we have used ‘ShortDateFormat‘ global variable in our project then we will get ‘E2003 Undeclared identifier ‘ShortDateFormat’ compiler error.

Why we get this error?

As some global variables typically pertain to Date, Time and Currency format (CurrencyString, ShorDateFormat, LongTimeFormat, ShortMonthNames, and so on) have been deprecated and removed declaration from Delphi XE3 or later versions. In old Delphi versions we can find this variables declaration in ‘System.SysUtils’ unit but from Delphi XE3 those are moved with TFormatSettings Record.

Workarounds to solve this error.

We can replace ‘ShortDateFormat‘ with ‘Formatsettings.ShortDateFormat’. And ‘FormatSettings‘ is a global variable of ‘TFormatSettings’ type declared in ‘SysUtils‘ which having these variables.

Errors when we migrate a project from Delphi 7 to Delphi XE3

Undeclared identifier DecimalSeparator
Undeclared identifier CurrencyFormat
Undeclared identifier ThousandSeparator
Undeclared identifier DateSeparator
Undeclared identifier TimeSeparator
Undeclared identifier ShortDateFormat
Undeclared identifier LongDateFormat

Solution to above errors

Formatsettings.DecimalSeparator
Formatsettings.CurrencyFormat
Formatsettings.ThousandSeparator
Formatsettings.DateSeparator
Formatsettings.TimeSeparator
Formatsettings.ShortDateFormat
Formatsettings.LongDateFormat

Following are some other global variables also having same issue:

Global Variable (System.SysUtils)	Corresponding TFormatSettings Field
CurrencyDecimals	CurrencyDecimals
CurrencyFormat	CurrencyFormat
CurrencyString	CurrencyString
DateSeparator	DateSeparator
DecimalSeparator	DecimalSeparator
ListSeparator	ListSeparator
LongDateFormat	LongDateFormat
LongDayNames	LongDayNames
LongDayNames	LongDayNames
LongTimeFormat	LongTimeFormat
NegCurrFormat	NegCurrFormat
ShortDateFormat	ShortDateFormat
ShortDayNames	ShortDayNames
ShortMonthNames	ShortMonthNames
ShortTimeFormat	ShortTimeFormat
ThousandSeparator	ThousandSeparator
TimeAMString	TimeAMString
TimePMString	TimePMString
TimeSeparator	TimeSeparator
TwoDigitYearCenturyWindow	TwoDigitYearCenturyWindow

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Источник

Delphi Compiler Error

Reason for the Error & Solution

E2003 Undeclared identifier ‘ShortDateFormat’ error in Delphi XE3 or later versions

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