The line, offset, and context fields are optional; parsing * engines may choose not to use to use them. * *
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: * *
* 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 ** *
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 occurred. 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 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