Enum Value 

pub enum Value {
    Unit,
    Bool(bool),
    Int(i64),
    Float(f64),
    Char(char),
    Str(String),
    Tuple(Vec<Value>),
    List(Vec<Value>),
    Option(Option<Box<Value>>),
    Range(i64, i64),
    FloatRange(f64, f64),
    Closure(Rc<Closure>),
    State(State<Value>),
    Binding(Binding<Value>),
    Result(Result<Box<Value>, Box<Value>>),
    Record(Rc<Record>),
    Place(Rc<RefCell<Value>>),
    Host(Host),
}

A value of the interpreted program.

Variants

Unit

().

Bool(bool)

true or false.

Int(i64)

A whole number of any integer type.

Float(f64)

A number with a fraction, of either float type.

Char(char)

A character.

Str(String)

Text: a String or a &str.

Tuple(Vec<Value>)

A tuple.

List(Vec<Value>)

A vector, an array or what an iterator yields.

Option(Option<Box<Value>>)

Some(..) or None.

Range(i64, i64)

a..b or a..=b, as the numbers it gives.

FloatRange(f64, f64)

A range of floats, which only says what it contains: 0.1..0.9.

Closure(Rc<Closure>)

A closure of the program.

State(State<Value>)

A State of the program, holding interpreter values.

Binding(Binding<Value>)

A binding that reads and writes part of another, as Binding::map makes.

Result(Result<Box<Value>, Box<Value>>)

Ok(..) or Err(..).

Record(Rc<Record>)

A value of a struct the program declares itself.

Place(Rc<RefCell<Value>>)

A place a closure was given to change, as |n| *n += 1 gets.

Host(Host)

An object of the host program.

Implementations

impl Value

pub fn as_binding(&self) -> Option<Binding<Value>>

A binding to what it holds, when it is a State or a binding.

pub fn read(&self) -> Value

What a place holds, or the value itself.

pub fn kind(&self) -> String

The name of its kind, for messages.

pub fn items(&self) -> Result<Vec<Value>, String>

The items it gives when iterated: a list’s, a range’s numbers, an option’s one or none.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl FromLive for Value

fn from_live(value: Value) -> Result<Self, String>

The value as this type, or why it cannot be.

impl IntoLive for Value

fn into_live(self) -> Value

The value for the interpreter.

impl PartialEq for Value

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.