Struct Spans

pub struct Spans(pub Vec<Span>);

A collection of Span, meant to be used as a field of entities whose location in the original SQL query is desired to be tracked. Sometimes an entity can have multiple spans. e.g. if you want to track the position of the column a that comes from SELECT 1 AS a UNION ALL SELECT 2 AS a you’ll need two spans.

Tuple Fields

0: Vec<Span>

Implementations

impl Spans

pub fn new() -> Self

Creates a new empty Spans with no Span.

pub fn first(&self) -> Option<Span>

Returns the first Span, if any. This is useful when you know that there’s gonna be only one Span at most.

pub fn get_spans(&self) -> &[Span]

Returns a slice of the Spans.

pub fn add_span(&mut self, span: Span)

Adds a Span to the collection.

pub fn iter(&self) -> impl Iterator<Item = &Span>

Iterates over the Spans.

Trait Implementations

impl Clone for Spans

fn clone(&self) -> Spans

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Spans

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

Formats the value using the given formatter.

impl Default for Spans

fn default() -> Self

Returns the “default value” for a type.

impl Hash for Spans

fn hash<H: Hasher>(&self, _state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Spans

fn cmp(&self, _other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Spans

fn eq(&self, _other: &Self) -> 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 PartialOrd for Spans

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Spans