NAME

Math::Expr::OpperationDB - A db of basic opperands properties

SYNOPSIS

require Math::Expr::OpperationDB;
$db=new Math::Expr::OpperationDB($file);

DESCRIPTION

This is a database containing info about the different opperations 
(eg +,  -, *, ...). Each opperation is represented by a regexp 
mathing a type specifikation. That way Real*Real wont be the same 
opperation as Matrix*Matrix even though the same operation character 
is used.

The data stored for each operation is the return type of the 
operation and whatever this operation is kommutativ or assosiative.

Currently the data is hardcoded into the code, but that is about to 
chnage.

METHODS

$db=new Math::Expr::OpperationDB;

Creates a new db.

$db->Find($t)

Tries all the type regexps in the db on $t and if one matches that 
post is returned.