/**
* Rewind the iterator.
*
* @return void
*/
public function rewind()
{
$this->_key = -1;
$this->_current = null;
if (null === $this->_coverage) {
if (empty($this->_variables)) {
$this->_variables = $this->_declaration->getLocalVariables();
}
$this->_coverage = new Coverage\Domain($this->_variables);
}
$this->_coverage->rewind();
$this->_current();
return;
}
/**
* Check a clause.
*
* @param \Hoa\Praspel\Model\Declaration $clause Clause.
* @param array &$data Data.
* @param \Hoa\Praspel\Exception\Group $exceptions Exceptions group.
* @param string $exception Exception to
* throw.
* @param bool $assign Assign data to
* variable.
* @param \Hoa\Praspel\Trace $trace Trace.
* @return bool
* @throws \Hoa\Praspel\Exception
*/
protected function checkClause(Praspel\Model\Declaration $clause, array &$data, \Hoa\Praspel\Exception\Group $exceptions, $exception, $assign = false, $trace = false)
{
$verdict = true;
$traceClause = null;
if (!empty($trace)) {
$traceClause = clone $clause;
}
foreach ($clause as $name => $variable) {
if (false === array_key_exists($name, $data)) {
$exceptions[] = new $exception('Variable %s in @%s is required and has no value.', 9, [$name, $clause->getName()]);
continue;
}
$datum =& $data[$name];
$_verdict = false;
$traceVariable = null;
if (null !== $traceClause) {
$traceVariable = clone $variable;
$traceVariableDomains = $traceVariable->getDomains();
}
$i = 0;
foreach ($variable->getDomains() as $realdom) {
if (false === $_verdict && true === $realdom->predicate($datum)) {
$_verdict = true;
} elseif (null !== $traceClause) {
unset($traceVariableDomains[$i--]);
}
++$i;
}
if (false === $_verdict) {
if (null !== $traceClause) {
unset($traceClause[$name]);
}
$exceptions[] = new $exception('Variable %s does not verify the constraint @%s %s.', 10, [$name, $clause->getName(), $this->getVisitorPraspel()->visit($variable)]);
} else {
if (true === $assign) {
$variable->setValue($datum);
}
if (null !== $traceClause) {
unset($traceClause[$name]);
$traceClause->addVariable($name, $traceVariable);
}
}
$verdict &= $_verdict;
}
$predicateEvaluator = function ($__hoa_arguments, $__hoa_code) {
extract($__hoa_arguments);
return true == eval('return ' . $__hoa_code . ';');
};
foreach ($clause->getPredicates() as $predicate) {
$_predicate = $predicate;
preg_match_all('#(?<!\\\\)\\$([a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*)#', $_predicate, $matches);
$predicateArguments = [];
foreach ($matches[1] as $variable) {
if (true === array_key_exists($variable, $data)) {
$predicateArguments[$variable] = $data[$variable];
}
}
if (false !== strpos($_predicate, '\\result')) {
if (!$clause instanceof Praspel\Model\Ensures && !$clause instanceof Praspel\Model\Throwable) {
$verdict &= false;
$exceptions[] = new $exception('Illegal \\result in the following predicate: %s.', 11, $predicate);
continue;
}
$placeholder = '__hoa_praspel_' . uniqid();
$_predicate = str_replace('\\result', '$' . $placeholder, $_predicate);
$predicateArguments[$placeholder] = $data['\\result'];
}
$_verdict = $predicateEvaluator($predicateArguments, $_predicate);
if (false === $_verdict) {
$exceptions[] = new $exception('Violation of the following predicate: %s.', 11, $predicate);
}
$verdict &= $_verdict;
}
if (!empty($trace)) {
$trace->addClause($traceClause);
}
return (bool) $verdict;
}