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-// © 2016 and later: Unicode, Inc. and others.
-// License & terms of use: http://www.unicode.org/copyright.html
-/*
-*******************************************************************************
-*
-* Copyright (C) 2009-2011, International Business Machines
-* Corporation and others. All Rights Reserved.
-*
-*******************************************************************************
-* file name: errorcode.h
-* encoding: UTF-8
-* tab size: 8 (not used)
-* indentation:4
-*
-* created on: 2009mar10
-* created by: Markus W. Scherer
-*/
-
-#ifndef __ERRORCODE_H__
-#define __ERRORCODE_H__
-
-/**
- * \file
- * \brief C++ API: ErrorCode class intended to make it easier to use
- * ICU C and C++ APIs from C++ user code.
- */
-
-#include "unicode/utypes.h"
-#include "unicode/uobject.h"
-
-U_NAMESPACE_BEGIN
-
-/**
- * Wrapper class for UErrorCode, with conversion operators for direct use
- * in ICU C and C++ APIs.
- * Intended to be used as a base class, where a subclass overrides
- * the handleFailure() function so that it throws an exception,
- * does an assert(), logs an error, etc.
- * This is not an abstract base class. This class can be used and instantiated
- * by itself, although it will be more useful when subclassed.
- *
- * Features:
- * - The constructor initializes the internal UErrorCode to U_ZERO_ERROR,
- * removing one common source of errors.
- * - Same use in C APIs taking a UErrorCode * (pointer)
- * and C++ taking UErrorCode & (reference) via conversion operators.
- * - Possible automatic checking for success when it goes out of scope.
- *
- * Note: For automatic checking for success in the destructor, a subclass
- * must implement such logic in its own destructor because the base class
- * destructor cannot call a subclass function (like handleFailure()).
- * The ErrorCode base class destructor does nothing.
- *
- * Note also: While it is possible for a destructor to throw an exception,
- * it is generally unsafe to do so. This means that in a subclass the destructor
- * and the handleFailure() function may need to take different actions.
- *
- * Sample code:
- * \code
- * class IcuErrorCode: public icu::ErrorCode {
- * public:
- * virtual ~IcuErrorCode() { // should be defined in .cpp as "key function"
- * // Safe because our handleFailure() does not throw exceptions.
- * if(isFailure()) { handleFailure(); }
- * }
- * protected:
- * virtual void handleFailure() const {
- * log_failure(u_errorName(errorCode));
- * exit(errorCode);
- * }
- * };
- * IcuErrorCode error_code;
- * UConverter *cnv = ucnv_open("Shift-JIS", error_code);
- * length = ucnv_fromUChars(dest, capacity, src, length, error_code);
- * ucnv_close(cnv);
- * // IcuErrorCode destructor checks for success.
- * \endcode
- *
- * @stable ICU 4.2
- */
-class U_COMMON_API ErrorCode: public UMemory {
-public:
- /**
- * Default constructor. Initializes its UErrorCode to U_ZERO_ERROR.
- * @stable ICU 4.2
- */
- ErrorCode() : errorCode(U_ZERO_ERROR) {}
- /** Destructor, does nothing. See class documentation for details. @stable ICU 4.2 */
- virtual ~ErrorCode();
- /** Conversion operator, returns a reference. @stable ICU 4.2 */
- operator UErrorCode & () { return errorCode; }
- /** Conversion operator, returns a pointer. @stable ICU 4.2 */
- operator UErrorCode * () { return &errorCode; }
- /** Tests for U_SUCCESS(). @stable ICU 4.2 */
- UBool isSuccess() const { return U_SUCCESS(errorCode); }
- /** Tests for U_FAILURE(). @stable ICU 4.2 */
- UBool isFailure() const { return U_FAILURE(errorCode); }
- /** Returns the UErrorCode value. @stable ICU 4.2 */
- UErrorCode get() const { return errorCode; }
- /** Sets the UErrorCode value. @stable ICU 4.2 */
- void set(UErrorCode value) { errorCode=value; }
- /** Returns the UErrorCode value and resets it to U_ZERO_ERROR. @stable ICU 4.2 */
- UErrorCode reset();
- /**
- * Asserts isSuccess().
- * In other words, this method checks for a failure code,
- * and the base class handles it like this:
- * \code
- * if(isFailure()) { handleFailure(); }
- * \endcode
- * @stable ICU 4.4
- */
- void assertSuccess() const;
- /**
- * Return a string for the UErrorCode value.
- * The string will be the same as the name of the error code constant
- * in the UErrorCode enum.
- * @stable ICU 4.4
- */
- const char* errorName() const;
-
-protected:
- /**
- * Internal UErrorCode, accessible to subclasses.
- * @stable ICU 4.2
- */
- UErrorCode errorCode;
- /**
- * Called by assertSuccess() if isFailure() is true.
- * A subclass should override this function to deal with a failure code:
- * Throw an exception, log an error, terminate the program, or similar.
- * @stable ICU 4.2
- */
- virtual void handleFailure() const {}
-};
-
-U_NAMESPACE_END
-
-#endif // __ERRORCODE_H__