/**
* @param array $expression
* @param CompilationContext $compilationContext
* @return CompiledExpression
* @throws CompilerException
*/
public function compile(array $expression, CompilationContext $compilationContext)
{
$compilationContext->headersManager->add('kernel/object');
$exprVariable = new Expression($expression['left']);
$exprVariable->setReadOnly(true);
$exprVariable->setExpectReturn(true);
$exprCompiledVariable = $exprVariable->compile($compilationContext);
if ($exprCompiledVariable->getType() != 'variable') {
throw new CompilerException("Expression type: " . $exprCompiledVariable->getType() . " cannot be used as array", $expression);
}
$clonedVariable = $compilationContext->symbolTable->getVariableForRead($exprCompiledVariable->getCode(), $compilationContext, $expression);
if ($clonedVariable->getType() != 'variable') {
throw new CompilerException("Variable type: " . $exprVariable->getType() . " cannot be cloned");
}
if ($clonedVariable->hasDifferentDynamicType(array('undefined', 'object', 'null'))) {
$compilationContext->logger->warning('Possible attempt to use non array in "clone" operator', 'non-valid-clone', $expression);
}
$symbolVariable = $this->getExpected($compilationContext, $expression);
if (!$symbolVariable->isVariable()) {
throw new CompilerException("Objects can only be cloned into dynamic variables", $expression);
}
$symbolVariable->setDynamicTypes('object');
$symbolVariable->setIsInitialized(true, $compilationContext, $expression);
/* Inherit the dynamic type data from the cloned object */
$symbolVariable->setDynamicTypes($clonedVariable->getDynamicTypes());
$symbolVariable->setClassTypes($clonedVariable->getClassTypes());
$compilationContext->codePrinter->output('if (zephir_clone(' . $symbolVariable->getName() . ', ' . $clonedVariable->getName() . ' TSRMLS_CC) == FAILURE) {');
$compilationContext->codePrinter->output("\t" . 'RETURN_MM();');
$compilationContext->codePrinter->output('}');
return new CompiledExpression('variable', $symbolVariable->getName(), $expression);
}
