/**
* Gets emitter
*
* @return xp.compiler.emit.Emitter
*/
protected static function emitter()
{
if (null === self::$emitter) {
self::$emitter = Emitter::newInstance();
}
return self::$emitter;
}
/**
* Compiles a class if necessary
*
* @param string $class
* @return string
* @throws lang.ClassLoadingException
*/
public function loadClass0($class)
{
if (isset(\xp::$cl[$class])) {
return literal($class);
}
// Locate sourcecode
if (null === ($source = $this->locateSource($class))) {
throw new ClassNotFoundException($class);
}
if (null === $this->emitter) {
$this->emitter = Emitter::newInstance();
}
// Parse, then emit source
$this->debug && fputs(STDERR, "COMPILE " . $source->toString() . "\n");
$scope = new TaskScope(new CompilationTask($source, new NullDiagnosticListener(), $this->files, $this->emitter));
$this->emitter->clearMessages();
try {
$r = $this->emitter->emit($source->getSyntax()->parse($source->getInputStream()), $scope);
} catch (ParseException $e) {
$this->debug && $e->printStackTrace();
throw new ClassFormatException('Cannot compile ' . $source->getURI() . ': ' . $e->formattedErrors(''), $e);
} catch (FormatException $e) {
$this->debug && $e->printStackTrace();
throw new JitCompilationError($class, [$this], $this->emitter->messages(), $e);
}
// Clean up
unset($this->source[$class]);
// Define type
$this->debug && fputs(STDERR, $r->type()->toString() . "\n");
$r->executeWith([]);
\xp::$cl[$class] = nameof($this) . '://' . $this->instanceId();
return $r->type()->literal();
}
