Struct VmEnv 

pub struct VmEnv { /* private fields */ }

Variable environment passed to the VM at execution time.

The VM does not modify the caller’s environment; StoreVar writes into a local clone that is discarded when execution ends.

Implementations

impl VmEnv

pub fn new() -> Self

Create an empty environment.

pub fn set(&mut self, name: impl Into<String>, val: VmValue)

Bind a variable to an arbitrary VmValue.

pub fn set_num(&mut self, name: impl Into<String>, val: f64)

Convenience helper: bind a variable to a numeric value.

pub fn set_bool(&mut self, name: impl Into<String>, val: bool)

Convenience helper: bind a variable to a boolean value.

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

Look up a variable by name.

pub fn len(&self) -> usize

Return the number of bindings in the environment.

pub fn is_empty(&self) -> bool

Return true if the environment contains no bindings.

Trait Implementations

impl Clone for VmEnv

fn clone(&self) -> VmEnv

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VmEnv

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

Formats the value using the given formatter.

impl Default for VmEnv

fn default() -> VmEnv

Returns the “default value” for a type.