Struct VariableRef

pub struct VariableRef<'a> { /* private fields */ }

A SPARQL query borrowed variable.

The default string formatter is returning a SPARQL compatible representation:

use oxrdf::{VariableNameParseError, VariableRef};

assert_eq!("?foo", VariableRef::new("foo")?.to_string());

Implementations

impl<'a> VariableRef<'a>

pub fn new(name: &'a str) -> Result<VariableRef<'a>, VariableNameParseError>

Creates a variable name from a unique identifier.

The variable identifier must be valid according to the SPARQL grammar.

pub const fn new_unchecked(name: &'a str) -> VariableRef<'a>

Creates a variable name from a unique identifier without validation.

It is the caller’s responsibility to ensure that id is a valid blank node identifier according to the SPARQL grammar.

Variable::new() is a safe version of this constructor and should be used for untrusted data.

pub const fn as_str(self) -> &'a str

pub fn into_string(self) -> String

pub fn into_owned(self) -> Variable

Trait Implementations

impl<'a> Clone for VariableRef<'a>

fn clone(&self) -> VariableRef<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for VariableRef<'a>

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

Formats the value using the given formatter.

impl Display for VariableRef<'_>

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

Formats the value using the given formatter.

impl<'a> From<&'a Variable> for VariableRef<'a>

fn from(variable: &'a Variable) -> VariableRef<'a>

Converts to this type from the input type.

impl<'a> From<VariableRef<'a>> for Variable

fn from(variable: VariableRef<'a>) -> Variable

Converts to this type from the input type.

impl<'a> Hash for VariableRef<'a>

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 Index<VariableRef<'_>> for QuerySolution

type Output = Term

The returned type after indexing.

fn index( &self, index: VariableRef<'_>, ) -> &<QuerySolution as Index<VariableRef<'_>>>::Output

Performs the indexing (container[index]) operation.

impl<'a> Ord for VariableRef<'a>

fn cmp(&self, other: &VariableRef<'a>) -> 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<Variable> for VariableRef<'_>

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 PartialEq<VariableRef<'_>> for Variable

fn eq(&self, other: &VariableRef<'_>) -> 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<'a> PartialEq for VariableRef<'a>

fn eq(&self, other: &VariableRef<'a>) -> 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<Variable> for VariableRef<'_>

fn partial_cmp(&self, other: &Variable) -> 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 PartialOrd<VariableRef<'_>> for Variable

fn partial_cmp(&self, other: &VariableRef<'_>) -> 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<'a> PartialOrd for VariableRef<'a>

fn partial_cmp(&self, other: &VariableRef<'a>) -> 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 VariableSolutionIndex for VariableRef<'_>

fn index(self, solution: &QuerySolution) -> Option<usize>

impl<'a> Copy for VariableRef<'a>

impl<'a> Eq for VariableRef<'a>

impl<'a> StructuralPartialEq for VariableRef<'a>