public function __construct(ITypeSystem $typeSystem, O\IEvaluationContext $evaluationContext)
{
parent::__construct($typeSystem);
$this->evaluationContext = $evaluationContext;
foreach ($evaluationContext->getVariableTable() as $variable => $value) {
$this->setExpressionType(O\Expression::variable(O\Expression::value($variable)), $typeSystem->getTypeFromValue($value));
}
}
protected function getVariableTable(array $customVariableTable = null)
{
//Loose equality: order is irrelevant
if ($customVariableTable !== null && count(array_diff(array_keys($customVariableTable), $this->requiredVariables)) > 0) {
throw new PinqException('Cannot evaluate expression: supplied variable table is invalid, variable names do not match the required variable names');
}
$contextVariableTable = $this->context->getVariableTable() ?: [];
$customVariableTable = $customVariableTable ?: [];
return $customVariableTable + $contextVariableTable;
}
