Struct Expression

pub struct Expression {
    pub value: Value,
    pub text: Rc<str>,
    pub location: Location,
}

An expression in a Rego query.

// Create engine and evaluate "1 + 2".
let results = Engine::new().eval_query("1 + 2".to_string(), false)?;

// Fetch the expression from results.
let expr = &results.result[0].expressions[0];

assert_eq!(expr.value, Value::from(3u64));
assert_eq!(expr.text.as_ref(), "1 + 2");

See also QueryResult.

Fields

value: Value

Computed value of the expression.

text: Rc<str>

The Rego expression.

location: Location

Location of the expression in the query string.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl PartialEq for Expression

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Expression

impl StructuralPartialEq for Expression