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Math-SymbolicX-Calculator-0.02
River stage one • 2 direct dependents • 2 total dependents
++
/ Math::SymbolicX::Calculator

NAME

Math::SymbolicX::Calculator - A representation of a Symbolic Calculator

SYNOPSIS

  # You probably want to use on of the interfaces instead such as
  # Math::SymbolicX::Calculator::Interface::Shell

  use Math::SymbolicX::Calculator;
  my $calc = Math::SymbolicX::Calculator->new();
  my $cmd = $calc->new_command(...);
  # ...
  $calc->execute($cmd);

DESCRIPTION

This class represents the state of a symbolic calculator. It is mainly a glorified state hash of variables and their contents.

It can execute commands which are represented by Math::SymbolicX::Calculator::Command objects and which operate on the symbol table on some way.

Any slot of the symbol table may either contain a Math::Symbolic tree or a Math::Symbolic::Custom::Transformation object.

METHODS

new

Returns a new Calculator object.

new_command

This method is a short-cut to Math::SymbolicX::Calculator::Command's new method and creates a new command object which can be executed using the Calculator object.

execute

Executes the command given as first argument. The command should be a Math::SymbolicX::Calculator::Command object. Returns any return values of the command's execution. (This may be a list!)

stash

Accesses the symbol table hash with the symbol name given as first argument. Valid symbol names match the regex /[A-Za-z][A-Za-z0-9_]*/.

(This is read only.)

get_transformation

First argument must be a symbol name. Accesses the Calculator symbol table to fetch a transformation from it that is saved as the symbol.

If the smybol table contains a transformation in the specified slot, that transformation is returned.

If it contains a formula, it manufactures a transformation from that formula which amounts to replacing the specified symbol with the formula.

If an error occurrs, an error message will be returned instead of a Math::Symbolic::Custom::Transformation object.

SEE ALSO

Math::SymbolicX::Calculator::Command, Math::SymbolicX::Calculator::Interface::Shell

Math::Symbolic, Math::Symbolic::Custom::Transformation

AUTHOR

Steffen Müller, <smueller@cpan.org>

COPYRIGHT AND LICENSE

Copyright (C) 2006, 2013 by Steffen Müller

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.6 or, at your option, any later version of Perl 5 you may have available.