Arithmetic\Evaluate()

[stephpy]

Evaluate mathematic operations

<?php

$compiler = \Hoa\Compiler\Llk::load(
            new \Hoa\File\Read('hoa://Library/Math/Arithmetic/Grammar.pp')
);

$visitor = new \Hoa\Math\Visitor\Arithmetic();
$result  = $visitor->visit($compiler->parse('10+10'));

I wrote tests on an other branch, theses passes :)

https://github.com/rezzza/Math/blob/evaluer/tests/units/Hoa/Math/Visitor/Arithmetic.php

[Hywan]

Done. Thank you for your contributions!