/**
* Get AST of the token representation.
*
* @return \Hoa\Compiler\Llk\TreeNode
*/
public function getAST()
{
if (null === static::$_regexCompiler) {
$stream = new File\Read('hoa://Library/Regex/Grammar.pp');
$stream->rewind();
static::$_regexCompiler = Compiler\Llk::load($stream);
}
if (null === $this->_ast) {
$this->_ast = static::$_regexCompiler->parse($this->getRepresentation());
}
return $this->_ast;
}
/**
* Print token sequence.
*
* @param \Hoa\Compiler\Llk\Parser $compiler Compiler.
* @return void
*/
protected function printTokenSequence(Compiler\Llk\Parser $compiler)
{
$sequence = $compiler->getTokenSequence();
$format = '%' . (strlen((string) count($sequence)) + 1) . 's ' . '%-13s %-20s %s %6s' . "\n";
$header = sprintf($format, '#', 'namespace', 'token name', 'token value ', 'offset');
echo $header, str_repeat('-', strlen($header)), "\n";
foreach ($sequence as $i => $token) {
printf($format, $i, $token['namespace'], $token['token'], 30 < $token['length'] ? mb_substr($token['value'], 0, 29) . '…' : 'EOF' === $token['token'] ? str_repeat(' ', 30) : $token['value'] . str_repeat(' ', 30 - $token['length']), $token['offset']);
}
return;
}
/**
* {@inheritDoc}
*/
public function interpret($rule)
{
return $this->visit($this->compiler->parse($rule));
}
/**
* Construct a generator.
*
* @param \Hoa\Compiler\Llk\Parser $compiler Compiler/parser.
* @param \Hoa\Visitor\Visit $tokenSampler Token sampler.
* @return void
*/
public function __construct(Compiler\Llk\Parser $compiler, Visitor\Visit $tokenSampler)
{
$this->_compiler = $compiler;
$this->_tokens = $compiler->getTokens();
$this->_rules = $compiler->getRules();
$this->_tokenSampler = $tokenSampler;
$this->_rootRuleName = $compiler->getRootRule();
return;
}