Struct Environment 

pub struct Environment {
    pub parent: Option<Box<Environment>>,
    pub variables: HashMap<String, Variable>,
    pub functions: HashMap<String, Function>,
    pub native_functions: HashMap<String, fn(&mut Environment, Vec<Value>) -> Option<Value>>,
}

Fields

parent: Option<Box<Environment>>

variables: HashMap<String, Variable>

functions: HashMap<String, Function>

native_functions: HashMap<String, fn(&mut Environment, Vec<Value>) -> Option<Value>>

Implementations

impl Environment

pub fn new(parent: Option<Box<Environment>>) -> Self

pub fn declare_function( &mut self, function_name: impl Into<String>, args: Vec<(Type, String)>, return_type: Option<Type>, body: Box<Expression>, ) -> Result<(), RuntimeError>

pub fn register_native_function( &mut self, name: impl Into<String>, function: fn(&mut Environment, Vec<Value>) -> Option<Value>, ) -> Result<(), RuntimeError>

pub fn get_native_function( &self, function_name: impl Into<String>, ) -> Option<fn(&mut Environment, Vec<Value>) -> Option<Value>>

pub fn declare_variable( &mut self, variable_name: impl Into<String>, ty: Type, value: Value, is_const: bool, ) -> Result<(), RuntimeError>

pub fn assign_variable( &mut self, variable_name: impl Into<String>, value: Value, ) -> Result<(), RuntimeError>

pub fn get_variable( &self, variable_name: impl Into<String>, ) -> Result<&Variable, RuntimeError>

pub fn get_function( &self, function_name: impl Into<String>, ) -> Result<&Function, RuntimeError>

Trait Implementations

impl Clone for Environment

fn clone(&self) -> Environment

Returns a duplicate of the value.

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

Performs copy-assignment from source.