Struct arithmetic_eval::Interpreter

pub struct Interpreter<'a, T: Grammar> { /* fields omitted */ }

Simple interpreter for arithmetic expressions.

Implementations

impl<'a, T> Interpreter<'a, T> where
    T: Grammar, 

pub fn new() -> Self

Creates a new interpreter.

pub fn get_var(&self, name: &'a str) -> Option<&Value<'a, T>>

Gets a variable by name.

pub fn variables(&self) -> impl Iterator<Item = (&'a str, &Value<'a, T>)> + '_

Iterates over variables.

pub fn insert_var(&mut self, name: &'a str, value: Value<'a, T>) -> &mut Self

Inserts a variable with the specified name.

pub fn insert_native_fn(
    &mut self,
    name: &'a str,
    native_fn: impl NativeFn<T> + 'static
) -> &mut Self

Inserts a native function with the specified name.

impl<'a, T> Interpreter<'a, T> where
    T: Grammar,
    T::Lit: Num + Neg<Output = T::Lit> + Pow<T::Lit, Output = T::Lit>, 

pub fn evaluate(
    &mut self,
    block: &Block<'a, T>
) -> Result<Value<'a, T>, ErrorWithBacktrace<'a>>

Evaluates a list of statements.

pub fn compile(
    &self,
    program: &Block<'a, T>
) -> Result<ExecutableModule<'a, T>, SpannedEvalError<'a>>

Compiles the provided block, returning the compiled module and its imports. The imports can the be changed to run the module with different params.

Trait Implementations

impl<'_, T: Grammar> Clone for Interpreter<'_, T>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, T: Debug + Grammar> Debug for Interpreter<'a, T>

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

Formats the value using the given formatter.

impl<'_, T: Grammar> Default for Interpreter<'_, T> where
    T::Lit: Num + Neg<Output = T::Lit> + Pow<T::Lit, Output = T::Lit>, 

fn default() -> Self

Returns the "default value" for a type.