Struct VarName 

pub struct VarName { /* private fields */ }

Represents a SPARQL variable name without the ? or $ prefix.

In SPARQL queries, variables are identifiers that begin with ? or $ (e.g., ?person, $email). This type stores the variable name without the prefix, but displays it with ? when formatted.

Implementations

impl VarName

pub fn new(str: &str) -> VarName

Creates a new variable name from a string.

Arguments

• str - The variable name without prefix

pub fn as_str(&self) -> &str

Returns the variable name as a string slice without prefix.

Trait Implementations

impl Clone for VarName

fn clone(&self) -> VarName

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VarName

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

Formats the value using the given formatter.

impl Display for VarName

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

Formats the variable name with the SPARQL ? prefix.

impl From<String> for VarName

fn from(value: String) -> Self

Converts a String into a VarName.

This conversion takes ownership of the string and wraps it as a variable name. The input should be the variable name without the ? or $ prefix.

Arguments

• value - The string to convert (without prefix)

impl Hash for VarName

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 PartialEq for VarName

fn eq(&self, other: &VarName) -> 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 Serialize for VarName

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<S: Rdf> VariableSolutionIndex<S> for &VarName

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

Finds the index of this variable in a query solution.

This implementation allows &VarName to be used for looking up variable positions within a QuerySolution. The variable is matched by comparing the stored name string with variable names in the solution.

Arguments

• solution - The query solution to search for this variable

impl Eq for VarName

impl StructuralPartialEq for VarName