Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Type error type represents the different types of errors that can be raised by the library when parsing a regular expression.
namespace boost{ namespace regex_constants{
typedef implementation-specific-type error_type;
static const error_type error_collate;
static const error_type error_ctype;
static const error_type error_escape;
static const error_type error_backref;
static const error_type error_brack;
static const error_type error_paren;
static const error_type error_brace;
static const error_type error_badbrace;
static const error_type error_range;
static const error_type error_space;
static const error_type error_badrepeat;
static const error_type error_complexity;
static const error_type error_stack;
static const error_type error_bad_pattern;
} // namespace regex_constants
} // namespace boost
The type error_type is an implementation-specific enumeration type that may take one of the following values:
| Constant | Meaning |
| error_collate | An invalid collating element was specified in a [[.name.]] block. |
| error_ctype | An invalid character class name was specified in a [[:name:]] block. |
| error_escape | An invalid or trailing escape was encountered. |
| error_backref | A back-reference to a non-existant marked sub-expression was encountered. |
| error_brack | An invalid character set [...] was encountered. |
| error_paren |
Mismatched '(' and ')'. |
| error_brace | Mismatched '{' and '}'. |
| error_badbrace | Invalid contents of a {...} block. |
| error_range | A character range was invalid, for example [d-a]. |
| error_space | Out of memory. |
| error_badrepeat | An attempt to repeat something that can not be repeated - for example a*+ |
| error_complexity | The expression became too complex to handle. |
| error_stack | Out of program stack space. |
| error_bad_pattern | Other unspecified errors. |
Revised 24 June 2004
© Copyright John Maddock 1998- 2004
Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. John Maddock makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.