Struct Env 

pub struct Env { /* private fields */ }

The expression environment: the variable bindings produced by evaluating the prelude (resolution = 32), the injected configurator object, and the user’s expressions statements in order.

Implementations

impl Env

pub fn build( expressions: &str, configurator_json: &Value, ) -> Result<Env, String>

Build the environment: prelude resolution = 32, then the injected configurator object, then the user’s expressions statements in order (users may overwrite resolution). configurator_json may be the full configurator state ({ values: {...}, ... }) or a bare values map — the .values sub-object is used when present, matching the prelude.

pub fn poisoned(msg: String) -> Env

A poisoned environment: eval() reports msg; numeric params still pass through. Lets execute_history keep the -> HistoryResult signature and surface an expression-block error per-feature instead of globally.

pub fn eval(&self, source: &str) -> Result<f64, String>

Evaluate a single expression string against the environment.

pub fn get(&self, name: &str) -> Option<f64>

Lookup a bound scalar variable (test/introspection helper).

Trait Implementations

impl Clone for Env

fn clone(&self) -> Env

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Env

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

Formats the value using the given formatter.

impl Default for Env

fn default() -> Env

Returns the “default value” for a type.