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// Copyright (C) 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (C) 1999-2005, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Date Name Description
* 03/14/00 aliu Creation.
* 06/27/00 aliu Change from C++ class to C struct
**********************************************************************
*/
#ifndef PARSEERR_H
#define PARSEERR_H
#include "unicode/utypes.h"
/**
* \file
* \brief C API: Parse Error Information
*/
/**
* The capacity of the context strings in UParseError.
* @stable ICU 2.0
*/
enum { U_PARSE_CONTEXT_LEN = 16 };
/**
* A UParseError struct is used to returned detailed information about
* parsing errors. It is used by ICU parsing engines that parse long
* rules, patterns, or programs, where the text being parsed is long
* enough that more information than a UErrorCode is needed to
* localize the error.
*
* <p>The line, offset, and context fields are optional; parsing
* engines may choose not to use to use them.
*
* <p>The preContext and postContext strings include some part of the
* context surrounding the error. If the source text is "let for=7"
* and "for" is the error (e.g., because it is a reserved word), then
* some examples of what a parser might produce are the following:
*
* <pre>
* preContext postContext
* "" "" The parser does not support context
* "let " "=7" Pre- and post-context only
* "let " "for=7" Pre- and post-context and error text
* "" "for" Error text only
* </pre>
*
* <p>Examples of engines which use UParseError (or may use it in the
* future) are Transliterator, RuleBasedBreakIterator, and
* RegexPattern.
*
* @stable ICU 2.0
*/
typedef struct UParseError {
/**
* The line on which the error occured. If the parser uses this
* field, it sets it to the line number of the source text line on
* which the error appears, which will be be a value >= 1. If the
* parse does not support line numbers, the value will be <= 0.
* @stable ICU 2.0
*/
int32_t line;
/**
* The character offset to the error. If the line field is >= 1,
* then this is the offset from the start of the line. Otherwise,
* this is the offset from the start of the text. If the parser
* does not support this field, it will have a value < 0.
* @stable ICU 2.0
*/
int32_t offset;
/**
* Textual context before the error. Null-terminated. The empty
* string if not supported by parser.
* @stable ICU 2.0
*/
UChar preContext[U_PARSE_CONTEXT_LEN];
/**
* The error itself and/or textual context after the error.
* Null-terminated. The empty string if not supported by parser.
* @stable ICU 2.0
*/
UChar postContext[U_PARSE_CONTEXT_LEN];
} UParseError;
#endif
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