3.1 Type definitions for regular expressions

Opaque Type: cre2_regexp_t

Opaque type for regular expression objects; it is meant to be used to declare pointers to objects. Instances of this type can be used for any number of matching operations and are safe for concurrent use by multiple threads.

Struct Typedef: cre2_string_t

Simple data structure used to reference a portion of another string. It has the following fields:

const char * data

Pointer to the first byte in the referenced substring.

int length

The number of bytes in the referenced substring.

Opaque Type: cre2_named_groups_iter_t

Opaque type for iterators over named capturing groups.

Enumeration Typedef: cre2_error_code_t

Enumeration type for error codes returned by cre2_error_code(). It contains the following symbols:

CRE2_NO_ERROR

Defined as 0, represents a successful operation.

CRE2_ERROR_INTERNAL

Unexpected error.

CRE2_ERROR_BAD_ESCAPE

Bad escape sequence.

CRE2_ERROR_BAD_CHAR_CLASS

Bad character class.

CRE2_ERROR_BAD_CHAR_RANGE

Bad character class range.

CRE2_ERROR_MISSING_BRACKET

Missing closing ].

CRE2_ERROR_MISSING_PAREN

Missing closing ).

CRE2_ERROR_TRAILING_BACKSLASH

Trailing \ at end of regexp.

CRE2_ERROR_REPEAT_ARGUMENT

Repeat argument missing, e.g. *.

CRE2_ERROR_REPEAT_SIZE

Bad repetition argument.

CRE2_ERROR_REPEAT_OP

Bad repetition operator.

CRE2_ERROR_BAD_PERL_OP

Bad Perl operator.

CRE2_ERROR_BAD_UTF8

Invalid UTF-8 in regexp.

CRE2_ERROR_BAD_NAMED_CAPTURE

Bad named capture group.

CRE2_ERROR_PATTERN_TOO_LARGE

Pattern too large (compile failed).

This document describes version 0.4.0-devel.2 of CRE2.