本文整理汇总了C++中PropertySet::IsSubset方法的典型用法代码示例。如果您正苦于以下问题：C++ PropertySet::IsSubset方法的具体用法？C++ PropertySet::IsSubset怎么用？C++ PropertySet::IsSubset使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PropertySet的用法示例。
在下文中一共展示了PropertySet::IsSubset方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: OptimizeExpression
void Optimizer::OptimizeExpression(std::shared_ptr<GroupExpression> gexpr,
PropertySet requirements)
{
LOG_TRACE("Optimizing expression of group %d with op %s",
gexpr->GetGroupID(), gexpr->Op().name().c_str());
// Helper function for costing follow up expressions
auto CostCandidate =
[this](std::shared_ptr<GroupExpression> candidate,
PropertySet requirements)
{
// Cost the expression
this->CostExpression(candidate);
// Only include cost if it meets the property requirements
if (requirements.IsSubset(candidate->Op().ProvidedOutputProperties())) {
// Add to group as potential best cost
Group *group = this->memo.GetGroupByID(candidate->GetGroupID());
LOG_TRACE("Adding expression cost on group %d with op %s",
candidate->GetGroupID(), candidate->Op().name().c_str());
group->SetExpressionCost(candidate,
candidate->GetCost(),
requirements);
}
};
// Cost the root expression
if (gexpr->Op().IsPhysical()) {
CostCandidate(gexpr, requirements);
// Transformation rules shouldn't match on physical operators so don't apply
// rules
} else {
// Apply transformations and cost those which match the requirements
for (const std::unique_ptr<Rule> &rule : rules) {
// Apply all rules to operator which match. We apply all rules to one
// operator before moving on to the next operator in the group because
// then we avoid missing the application of a rule e.g. an application
// of some rule creates a match for a previously applied rule, but it is
// missed because the prev rule was already checked
std::vector<std::shared_ptr<GroupExpression>> candidates =
TransformExpression(gexpr, *(rule.get()));
for (std::shared_ptr<GroupExpression> candidate : candidates) {
// If logical...
if (candidate->Op().IsLogical()) {
// Optimize the expression
OptimizeExpression(candidate, requirements);
}
if (candidate->Op().IsPhysical()) {
CostCandidate(candidate, requirements);
}
}
}
}
}