/**
* @param SyntaxNode $astNode
* @param DotFile $dotFile
*
* @return bool
*/
public function write(SyntaxNode $astNode, DotFile $dotFile)
{
$visitorProvider = new Writers($dotFile, new VisitContext());
$dispatchingProvider = new DispatchingProvider($visitorProvider);
$walkStrategy = PreOrderVisitStrategy::newDefaultInstance($dispatchingProvider);
$walker = new StackBasedAstWalker($walkStrategy);
$walkResult = $walker->walk($astNode);
return $walkResult;
}
public function translate(SyntaxNode $node)
{
$visitContext = new AstTranslatorContext();
$visitorProvider = new VisitorProvider($visitContext);
$dispatchingProvider = new DispatchingProvider($visitorProvider);
$walkStrategy = PreOrderVisitStrategy::newDefaultInstance($dispatchingProvider);
$walker = new StackBasedAstWalker($walkStrategy);
foreach ($node->getRuleNodes() as $rule) {
$walker->walk($rule);
}
$productions = $visitContext->getProductions();
if (empty($productions)) {
throw new \Exception('no productions found');
}
$grammarTitle = 'untitled';
$grammarTitleNode = $node->getGrammarTitleNode();
if ($grammarTitleNode instanceof LiteralNode) {
$grammarTitle = $grammarTitleNode->getLiteral();
}
$grammar = new StandardGrammar($grammarTitle, $productions);
return $grammar;
}