Struct oxrdf::Variable

pub struct Variable { /* private fields */ }

A SPARQL query owned variable.

The default string formatter is returning a SPARQL compatible representation:

use oxrdf::{Variable, VariableNameParseError};

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

Implementations

impl Variable

pub fn new(name: impl Into<String>) -> Result<Self, VariableNameParseError>

Creates a variable name from a unique identifier.

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

pub fn new_unchecked(name: impl Into<String>) -> Self

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 fn as_str(&self) -> &str

pub fn into_string(self) -> String

pub fn as_ref(&self) -> VariableRef<'_>

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

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

Converts to this type from the input type.

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

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

Converts to this type from the input type.

impl FromStr for Variable

fn from_str(s: &str) -> Result<Self, TermParseError>

Parses a variable from its SPARQL serialization

use oxrdf::Variable;
use std::str::FromStr;

assert_eq!(Variable::from_str("$foo").unwrap(), Variable::new("foo").unwrap())

type Err = TermParseError

The associated error which can be returned from parsing.

impl Hash for Variable

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 Variable

fn cmp(&self, other: &Variable) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Variable> for Variable

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<Variable> for VariableRef<'_>

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

This method tests for self and other values to be equal, and is used by ==.

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

This method 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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd<Variable> for Variable

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method 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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Eq for Variable

impl StructuralEq for Variable

impl StructuralPartialEq for Variable