Function compute___expr__field_names_in_expression

r/src/expression.cpp:68–82

[[arrow::export]]

// [[arrow::export]]
std::vector<std::string> compute___expr__field_names_in_expression(
    const std::shared_ptr<compute::Expression>& x) {
  std::vector<std::string> names;
  for (const auto& ref : compute::FieldsInExpression(*x)) {
    if (ref.IsNested()) {
      // Slight hack: this isn't the field's "name", but it's good enough
      // for my current purposes. A nested field ref doesn't have a name property.
      // Alternatively, we could skip nested refs like in get_field_ref_name
      names.push_back(ref.ToString());
    } else {
      names.push_back(*ref.name());
    }
  }
  return names;
}

// [[arrow::export]]
std::shared_ptr<compute::Expression> compute___expr__field_ref(std::string name) {