private function tree()
{
try {
$lexer = new Tokenizer($this->source);
$parser = new TokenReader($lexer);
$parser->arithmetic();
$parser->printExpressionTree();
} catch (Exception $e) {
echo $e->getMessage();
}
}
<?php
/**
* @author Elynton Fellipe Bazzo
* @author Andrei Siqueira
*/
require_once 'Lexer.php';
require_once 'Parser.php';
require_once 'Tokenizer.php';
require_once 'TokenReader.php';
require_once 'Token.php';
require_once 'LexerError.php';
require_once 'ParserError.php';
$source = <<<END
-(3) / -10;
END;
try {
// Instanciamos o lexer e o parser, fazemos a análise aritmética e
// imprimimos a árvore gerada
$lexer = new Tokenizer($source);
$parser = new TokenReader($lexer);
$parser->arithmetic();
$parser->printExpressionTree();
} catch (Exception $e) {
echo $e->getMessage();
}
