Struct FunctionEnv

pub struct FunctionEnv { /* private fields */ }

An environment for defined, named functions.

Implementations

impl FunctionEnv

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

Tries to retrieve the registration for a function by name.

Arguments

• name - The name of the function to retrieve.

pub fn get_mut(&mut self, name: &str) -> Option<&mut FunctionRegistration>

Tries to retrieve a mutable reference to the registration for a function by name.

Arguments

• name - The name of the function to retrieve.

pub fn remove(&mut self, name: &str) -> Option<FunctionRegistration>

Unregisters a function from the environment.

Arguments

• name - The name of the function to remove.

pub fn update(&mut self, name: String, registration: FunctionRegistration)

Updates a function registration in this environment.

Arguments

• name - The name of the function to update.
• registration - The new registration for the function.

pub fn clear(&mut self)

Clear all functions in this environment.

pub fn iter(&self) -> impl Iterator<Item = (&String, &FunctionRegistration)>

Returns an iterator over the functions registered in this environment.

Trait Implementations

impl Clone for FunctionEnv

fn clone(&self) -> FunctionEnv

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for FunctionEnv

fn default() -> FunctionEnv

Returns the “default value” for a type.