---
name: "Perl::MinimumVersion::Fast"
section: "3pm"
platform: "linux"
package: "libperl-minimumversion-fast-perl"
version: "0.22-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Perl::MinimumVersion::Fast"
---

# Perl::MinimumVersion::Fast(3pm)

Find a minimum required version of perl for Perl code

## NAME

Perl::MinimumVersion::Fast - Find a minimum required version of perl for Perl code

## SYNOPSIS

```
    use Perl::MinimumVersion::Fast;
    my $p = Perl::MinimumVersion::Fast->new($filename);
    print $p->minimum_version, "\n";
```

## DESCRIPTION

"Perl::MinimumVersion::Fast" takes Perl source code and calculates the minimum version of perl required to be able to run it. Because it is based on goccy's Compiler::Lexer, it can do this without having to actually load the code.

Perl::MinimumVersion::Fast is an alternative fast & lightweight implementation of Perl::MinimumVersion.

## METHODS

- "my $p = Perl::MinimumVersion::Fast-\>new($filename);"

  - "my $p = Perl::MinimumVersion::Fast-\>new(\\$src);"

  Create new instance. You can create object from `$filename` and `"\$src"` in string.

- "$p-\>minimum\_version();"

  Get a minimum perl version the code required.

- "$p-\>minimum\_explicit\_version()"

  The `"minimum_explicit_version"` method checks through Perl code for the use of explicit version dependencies such as.

  ```
    use 5.006;
    require 5.005_03;
  ```

  Although there is almost always only one of these in a file, if more than one are found, the highest version dependency will be returned.

  Returns a version object, `"undef"` if no dependencies could be found.

- "$p-\>minimum\_syntax\_version()"

  The `"minimum_syntax_version"` method will explicitly test only the Document's syntax to determine it's minimum version, to the extent that this is possible.

  Returns a version object, `"undef"` if no dependencies could be found.

- version\_markers

  This method returns a list of pairs in the form:

  ```
      ($version, \@markers)
  ```

  Each pair represents all the markers that could be found indicating that the version was the minimum needed version.  `@markers` is an array of strings. Currently, these strings are not as clear as they might be, but this may be changed in the future.  In other words: don't rely on them as specific identifiers.

## BENCHMARK

Perl::MinimumVersion::Fast is faster than Perl::MinimumVersion. Because Perl::MinimumVersion::Fast uses Compiler::Lexer, that is a Perl5 lexer implemented in C++. And Perl::MinimumVersion::Fast omits some features implemented in Perl::MinimumVersion.

But, but, Perl::MinimumVersion::Fast is really fast.

```
                                Rate Perl::MinimumVersion Perl::MinimumVersion::Fast
    Perl::MinimumVersion       5.26/s                   --                       -97%
    Perl::MinimumVersion::Fast  182/s                3365%                         --
```

## LICENSE

Copyright (C) tokuhirom.

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

## THANKS TO

Most of documents are taken from Perl::MinimumVersion.

## AUTHOR

tokuhirom \<tokuhirom@gmail.com\>

## SEE ALSO

This module using Compiler::Lexer as a lexer for Perl5 code.

This module is inspired from Perl::MinimumVersion.