Method CheckForUnknowns

eval/eval/attribute_utility.cc:153–164

Creates merged UnknownAttributeSet. Scans over the args collection, determines if there matches to unknown patterns, merges attributes together with those from initial_set (if initial_set is not null). Returns pointer to merged set or nullptr, if there were no sets to merge.

// (if initial_set is not null).
// Returns pointer to merged set or nullptr, if there were no sets to merge.
AttributeSet AttributeUtility::CheckForUnknowns(
    absl::Span<const AttributeTrail> args, bool use_partial) const {
  AttributeSet attribute_set;

  for (const auto& trail : args) {
    if (CheckForUnknown(trail, use_partial)) {
      attribute_set.Add(trail.attribute());
    }
  }

  return attribute_set;
}

// Creates merged UnknownAttributeSet.
// Merges together attributes from UnknownAttributeSets found in the args