---
name: "Math::Symbolic::Custom::Base"
section: "3pm"
platform: "linux"
package: "libmath-symbolic-perl"
version: "0.613-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Math::Symbolic::Custom::Base"
---

# Math::Symbolic::Custom::Base(3pm)

Base class for tree tests and transformations

## NAME

Math::Symbolic::Custom::Base - Base class for tree tests and transformations

## SYNOPSIS

```
  # Extending the Math::Symbolic::Custom class:
  package Math::Symbolic::Custom::MyTransformations;
  use Math::Symbolic::Custom::Base;
  BEGIN {*import = \&Math::Symbolic::Custom::Base::aggregate_import}

  our $Aggregate_Export = [qw/apply_transformation1 .../];
  sub apply_transformation1 {
     # ...
  }
```

## DESCRIPTION

This is a base class for your extensions to the Math::Symbolic::Custom class.

To extend the class, just use the following template for your custom class:

```
  package Math::Symbolic::Custom::MyTransformations;
  use Math::Symbolic::Custom::Base;
  BEGIN {*import = \&Math::Symbolic::Custom::Base::aggregate_import}

  our $Aggregate_Export = [...]; # exported subroutines listed here.

  # Now implement the subroutines.
  # Exported subroutine names must start with 'apply_', 'mod_',
  # 'is_', 'test_', 'contains_', or 'to_'

  # ...

  1;
```

### EXPORT

Uses a custom exporter implementation to export certain routines from the invoking namespace to the Math::Symbolic::Custom namespace. But... Nevermind.

## SUBROUTINES

### aggregate\_import

**aggregate\_import()** is the only public subroutine defined by Math::Symbolic::Custom::Base and should only be called in BEGIN blocks like the one shown in the SYNOPSIS above.

## AUTHOR

Please send feedback, bug reports, and support requests to the Math::Symbolic support mailing list: math-symbolic-support at lists dot sourceforge dot net. Please consider letting us know how you use Math::Symbolic. Thank you.

If you're interested in helping with the development or extending the module's functionality, please contact the developers' mailing list: math-symbolic-develop at lists dot sourceforge dot net.

List of contributors:

```
  Steffen M�ller, symbolic-module at steffen-mueller dot net
  Stray Toaster, mwk at users dot sourceforge dot net
  Oliver Ebenh�h
```

## SEE ALSO

New versions of this module can be found on http://steffen-mueller.net or CPAN. The module development takes place on Sourceforge at http://sourceforge.net/projects/math-symbolic/

Math::Symbolic