protected function compute($expression)
{
// Load the compiler
$compiler = \Hoa\Compiler\Llk::load(new \Hoa\File\Read('hoa://Library/Math/Arithmetic.pp'));
// Load the visitor, aka the "evaluator"
$visitor = new \Hoa\Math\Visitor\Arithmetic();
// Parse the expression
$ast = $compiler->parse($expression);
// Evaluate
$result = $visitor->visit($ast);
return $result;
}
protected function command_math(Shotbow_ChatBot_User $sender, $arguments)
{
if (empty($arguments)) {
$this->postMessage('You need to provide a mathematical expression for me to solve if you\'re going to use this command.');
} else {
try {
$compiler = Hoa\Compiler\Llk\Llk::load(new Hoa\File\Read('hoa://Library/Math/Arithmetic.pp'));
$visitor = new Hoa\Math\Visitor\Arithmetic();
$ast = $compiler->parse($arguments);
$result = $visitor->visit($ast);
$this->postMessage($arguments . ' = ' . $result);
} catch (Exception $e) {
$this->postMessage('I\'m sorry, but I don\'t recognize that as a mathematical expression. Feel free to try another.');
}
}
}
