Struct DataContext 

pub struct DataContext { /* private fields */ }

Data context for expression execution.

Implementations

impl DataContext

pub fn new() -> Self

Create a new empty context.

pub fn insert(&mut self, name: impl Into<String>, value: Value)

Add a data source.

pub fn get(&self, name: &str) -> Option<&Value>

Get a data source.

pub fn contains(&self, name: &str) -> bool

Check if context has a source.

Trait Implementations

impl Clone for DataContext

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataContext

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

Formats the value using the given formatter.

impl Default for DataContext

fn default() -> Self

Returns the “default value” for a type.