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.\" ========================================================================
.\"
.IX Title "BSON::Regex 3"
.TH BSON::Regex 3 "2018-12-07" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
BSON::Regex \- BSON type wrapper for regular expressions
.SH "VERSION"
.IX Header "VERSION"
version v1.10.2
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use BSON::Types \*(Aq:all\*(Aq;
\&
\&    $regex = bson_regex( $pattern );
\&    $regex = bson_regex( $pattern, $flags );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides a \s-1BSON\s0 type wrapper for a \s-1PCRE\s0 regular expression and
optional flags.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
.SS "pattern"
.IX Subsection "pattern"
A \fBstring\fR containing a \s-1PCRE\s0 regular expression pattern (not a \f(CW\*(C`qr\*(C'\fR object
and without slashes).  Default is the empty string.
.SS "flags"
.IX Subsection "flags"
A string with regular expression flags.  Flags will be sorted and
duplicates will be removed during object construction.  Supported flags
include \f(CW\*(C`imxlsu\*(C'\fR.  Invalid flags will cause an exception.
Default is the empty string.
.SH "METHODS"
.IX Header "METHODS"
.SS "try_compile"
.IX Subsection "try_compile"
.Vb 1
\&    my $qr = $regexp\->try_compile;
.Ve
.PP
Tries to compile the \f(CW\*(C`pattern\*(C'\fR and \f(CW\*(C`flags\*(C'\fR into a reference to a regular
expression.  If the pattern or flags can't be compiled, a
exception will be thrown.
.PP
\&\fB\s-1SECURITY NOTE\s0\fR: Executing a regular expression can evaluate arbitrary
code if the re 'eval' pragma is in force.  You are strongly advised
to read re and never to use untrusted input with \f(CW\*(C`try_compile\*(C'\fR.
.SS "\s-1TO_JSON\s0"
.IX Subsection "TO_JSON"
If the \f(CW\*(C`BSON_EXTJSON\*(C'\fR option is true, returns a hashref compatible with
MongoDB's extended \s-1JSON\s0 <https://github.com/mongodb/specifications/blob/master/source/extended-json.rst>
format, which represents it as a document as follows:
.PP
.Vb 1
\&    {"$regularExpression" : { pattern: "<pattern>", "options" : "<flags>"} }
.Ve
.PP
If the \f(CW\*(C`BSON_EXTJSON\*(C'\fR option is false, an error is thrown, as this value
can't otherwise be represented in \s-1JSON.\s0
.SH "AUTHORS"
.IX Header "AUTHORS"
.IP "\(bu" 4
David Golden <david@mongodb.com>
.IP "\(bu" 4
Stefan G. <minimalist@lavabit.com>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is Copyright (c) 2018 by Stefan G. and MongoDB, Inc.
.PP
This is free software, licensed under:
.PP
.Vb 1
\&  The Apache License, Version 2.0, January 2004
.Ve

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