Struct typedb_driver::answer::concept_row::ConceptRow

pub struct ConceptRow {
    pub row: Vec<Option<Concept>>,
    /* private fields */
}

A single row of concepts representing substitutions for variables in the query Contains a Header (column names), and the row of optional concepts An empty concept in a column means the variable does not have a substitution in this answer.

Fields

row: Vec<Option<Concept>>

Implementations

impl ConceptRow

pub fn new(header: Arc<ConceptRowHeader>, row: Vec<Option<Concept>>) -> Self

pub fn get_header(&self) -> &[String]

Retrieve the row header (shared by all elements in this stream).

Arguments

Examples

concept_row.get_header()

pub fn get(&self, column_name: &str) -> Option<&Concept>

Retrieves a concept for a given variable. Returns an empty optional if the variable name has an empty answer, or if the variable name is not present.

Arguments

• var_name – The variable name in the row to retrieve

Examples

concept_row.get(var_name)

pub fn get_index(&self, column_index: usize) -> Option<&Concept>

Retrieves a concept for a given column index. Returns an empty optional if the position has an empty answer, or if the index is not range for the row.

Arguments

• column_index – The position in the row to retrieve

Examples

concept_row.get_position(column_index)

pub fn get_concepts(&self) -> impl Iterator<Item = &Concept>

Produces an iterator over all concepts in this ConceptRow, skipping empty results

Examples

concept_row.concepts()

Trait Implementations

impl Clone for ConceptRow

fn clone(&self) -> ConceptRow

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConceptRow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ConceptRow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ConceptRow

fn eq(&self, other: &ConceptRow) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ConceptRow