Struct Variable

pub struct Variable { /* private fields */ }

A Value reference.

Implementations

impl Variable

pub fn with_literal<S: Into<Scalar>>(value: S) -> Self

Create a Value reference.

pub fn push_literal<S: Into<Scalar>>(self, value: S) -> Self

Append a literal.

pub fn try_evaluate<'c>(&'c self, context: &'c Context<'_>) -> Option<Path<'c>>

Convert to a Path.

pub fn evaluate<'c>(&'c self, context: &'c Context<'_>) -> Result<Path<'c>>

Convert to a Path.

Trait Implementations

impl Clone for Variable

fn clone(&self) -> Variable

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Variable

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

Formats the value using the given formatter.

impl Display for Variable

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

Formats the value using the given formatter.

impl Extend<Expression> for Variable

fn extend<T: IntoIterator<Item = Expression>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Extend<ScalarCow<'static>> for Variable

fn extend<T: IntoIterator<Item = Scalar>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl PartialEq for Variable

fn eq(&self, other: &Variable) -> 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 Variable