Struct rurtle::environ::Environment

pub struct Environment {
    // some fields omitted
}

Methods

impl Environment

fn new(turtle: Turtle) -> Environment

Construct a new Environment with default values

fn get_turtle(&mut self) -> &mut Turtle

fn function_arg_count(&self) -> HashMap<String, i32>

Return a map mapping the function name to the argument count. Useful for passing it to Parser::parse

fn eval_source(&mut self, source: &str) -> Result<Value, Box<Error>>

Tokenize, parse and evaluate the given source

fn eval(&mut self, node: &Node) -> ResultType

Evaluate the given AST node

fn current_frame(&mut self) -> &mut Frame

Return the current stack frame or the global frame if the code is not executing in a function

fn global_frame(&mut self) -> &mut Frame

Return the global frame

fn get_variable(&mut self, name: &str) -> Option<Value>

Retrieve the value for the variable with the given name

The variable is searched in the current function's local variables. If it is not defined there, the global namespace will be searched. If the variable is not found there either, None is returned.