errant/tacit

<?php
namespace Tacit\Lexer;
/**
 * The Tac Lexer
 *
 * @author Tom Morton
 */
class Tac {

    protected static $_terminals = array(
        "/^(?P<name>[A-Z]{3})$/"  => 'T_CMD',
        "/^(?P<name>[A-Z]{3}) /"  => 'T_CMD',
        "/ (?P<name>.*)$/"          => 'T_OPERAND'
    );

    public static function run($input)
    {
        $source = explode("\n", $input);
        $tokens = array();

        foreach($source as $line) {
            $lineTokens = array();

            foreach(self::$_terminals as $regex => $terminal) 
            {
                if(preg_match($regex, $line, $match) == 1) {
                    $lineTokens[$terminal] = $match['name'];
                }
            }

            $tokens[] = $lineTokens;
        }

        return $tokens;
    }
}