Struct Evaluator 

pub struct Evaluator { /* private fields */ }

Stable evaluator facade.

Full JSONata evaluation parity is not finished yet. evaluate currently returns an explicit not-implemented error and is kept as stable API surface for upcoming releases.

Examples

let evaluator = async_jsonata_rust::Evaluator::with_builtins();
let expression = evaluator.parse("1")?;
let result = evaluator.evaluate(&expression, &async_jsonata_rust::JsonValue::Null);
assert!(result.is_err());

Implementations

impl Evaluator

pub fn new(functions: FunctionRegistry) -> Self

Creates evaluator with empty registry.

Examples

let evaluator = async_jsonata_rust::Evaluator::new(async_jsonata_rust::FunctionRegistry::new());
assert!(evaluator.function_registry().is_empty());

pub fn with_builtins() -> Self

Creates evaluator with built-in registry.

Examples

let evaluator = async_jsonata_rust::Evaluator::with_builtins();
assert!(evaluator.function_registry().contains("sqrt"));

pub fn parse(&self, source: impl Into<String>) -> Result<Expression, Error>

Parses expression using stable parser API.

Examples

let evaluator = async_jsonata_rust::Evaluator::with_builtins();
let expression = evaluator.parse("foo.bar")?;
assert_eq!(expression.ast()["type"], "path");

pub fn evaluate( &self, expression: &Expression, _input: &JsonValue, ) -> Result<JsonValue, Error>

Evaluates parsed expression against input JSON.

Examples

let evaluator = async_jsonata_rust::Evaluator::with_builtins();
let expression = evaluator.parse("1")?;
let out = evaluator.evaluate(&expression, &async_jsonata_rust::JsonValue::Null);
assert!(out.is_err());

pub fn function_registry(&self) -> &FunctionRegistry

Returns evaluator function registry.

Examples

let evaluator = async_jsonata_rust::Evaluator::with_builtins();
assert!(evaluator.function_registry().contains("abs"));

Trait Implementations

impl Clone for Evaluator

fn clone(&self) -> Evaluator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Evaluator

fn default() -> Evaluator

Returns the “default value” for a type.