NAME

Regexp::From::String - Convert '/.../' or 'qr(...)' into Regexp object

VERSION

This document describes version 0.002 of Regexp::From::String (from Perl distribution Regexp-From-String), released on 2022-07-09.

SYNOPSIS

 use Regexp::From::String qw(str_maybe_to_re str_to_re);

 my $re1 = str_maybe_to_re('foo');        # stays as string 'foo'
 my $re2 = str_maybe_to_re('/foo');       # stays as string '/foo'
 my $re3 = str_maybe_to_re('/foo/');      # compiled to Regexp object qr(foo)
 my $re4 = str_maybe_to_re('qr(foo)i');   # compiled to Regexp object qr(foo)i
 my $re5 = str_maybe_to_re('qr(foo[)i');  # dies, invalid regex syntax

 my $re1 = str_to_re('foo');        # compiled to Regexp object qr(foo)
 my $re2 = str_to_re('/foo');       # compiled to Regexp object qr(/foo)
 my $re2 = str_to_re({case_insensitive=>1}, 'foo[]');  # compiled to Regexp object qr(foo\[\])i
 my $re2 = str_to_re({anchored=>1}, 'foo[]');          # compiled to Regexp object qr(\Afoo\[\]\z)
 my $re3 = str_to_re('/foo/');      # compiled to Regexp object qr(foo)
 my $re4 = str_to_re('qr(foo)i');   # compiled to Regexp object qr(foo)i
 my $re5 = str_to_re('qr(foo[)i');  # dies, invalid regex syntax

FUNCTIONS

str_maybe_to_re

Maybe convert string to Regexp object.

Usage:

 $str_or_re = str_maybe_to_re($str);

Check if string $str is in the form of /.../ or qr(...)' and if so, compile the inside regex (currently simply using stringy eval) and return the resulting Regexp object. Otherwise, will simply return the argument unmodified.

Will die if compilation fails, e.g. when the regexp syntax is invalid.

For the qr(...) form, unlike in Perl, currently only the () delimiter characters are recognized and not others.

Optional modifiers i, m, and s are currently allowed at the end.

str_to_re

Convert string to Regexp object.

Usage:

 $str_or_re = str_to_re([ \%opts , ] $str);

This function is similar to "str_maybe_to_re" except that when string is not in the form of /.../ or qr(...), the string is quotemeta()'ed then converted to a Regexp object anyway. There are some options available to specify in first argument hashref \%opts:

case_insensitive

Bool. If set to true will compile to Regexp object with i regexp modifier.

anchored

Bool. If set to true will anchor the pattern with \A and \z.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Regexp-From-String.

SOURCE

Source repository is at https://github.com/perlancar/perl-Regexp-From-String.

SEE ALSO

Sah::Schema::str_or_re

AUTHOR

perlancar <perlancar@cpan.org>

CONTRIBUTING

To contribute, you can send patches by email/via RT, or send pull requests on GitHub.

Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla plugin and/or Pod::Weaver::Plugin. Any additional steps required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE

This software is copyright (c) 2022 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Regexp-From-String

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

cpanm Regexp::From::String

perl -MCPAN -e shell
install Regexp::From::String