Enum QueryPredicateArgument 

pub enum QueryPredicateArgument {
    Capture(String),
    Literal(String),
}

Predicate argument parsed from an S-expression query.

Variants

Capture(String)

Capture reference such as @name.

Literal(String)

Host literal such as "main" or an unquoted atom.

Implementations

impl QueryPredicateArgument

pub fn capture_name(&self) -> Option<&str>

Returns the referenced capture name, if this argument is a capture.

pub fn literal(&self) -> Option<&str>

Returns the literal value, if this argument is a literal.

Trait Implementations

impl Clone for QueryPredicateArgument

fn clone(&self) -> QueryPredicateArgument

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryPredicateArgument

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

Formats the value using the given formatter.

impl PartialEq for QueryPredicateArgument

fn eq(&self, other: &QueryPredicateArgument) -> 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 Eq for QueryPredicateArgument

impl StructuralPartialEq for QueryPredicateArgument