59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
[/
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Copyright 2006-2007 John Maddock.
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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]
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[section:bad_expression bad_expression]
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[h4 Synopsis]
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#include <boost/pattern_except.hpp>
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The class `regex_error` defines the type of objects thrown as exceptions to
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report errors during the conversion from a string representing a regular
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expression to a finite state machine.
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namespace boost{
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class regex_error : public std::runtime_error
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{
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public:
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explicit regex_error(const std::string& s, regex_constants::error_type err, std::ptrdiff_t pos);
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explicit regex_error(boost::regex_constants::error_type err);
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boost::regex_constants::error_type code()const;
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std::ptrdiff_t position()const;
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};
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typedef regex_error bad_pattern; // for backwards compatibility
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typedef regex_error bad_expression; // for backwards compatibility
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} // namespace boost
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[h4 Description]
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regex_error(const std::string& s, regex_constants::error_type err, std::ptrdiff_t pos);
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regex_error(boost::regex_constants::error_type err);
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[*Effects:] Constructs an object of class regex_error.
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boost::regex_constants::error_type code()const;
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[*Effects:] returns the error code that represents parsing error that occurred.
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std::ptrdiff_t position()const;
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[*Effects:] returns the location in the expression where parsing stopped.
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Footnotes: the choice of `std::runtime_error` as the base class for `regex_error`
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is moot; depending upon how the library is used exceptions may be either
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logic errors (programmer supplied expressions) or run time errors
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(user supplied expressions). The library previously used `bad_pattern`
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and `bad_expression` for errors, these have been replaced by the single
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class `regex_error` to keep the library in synchronization with the
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[tr1].
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[endsect]
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