Enum Value 

pub enum Value {
    Int(i64),
    Float(f64),
    Bool(bool),
    Str(String),
    Char(char),
    List(Vec<Value>),
    Con(String, Vec<Value>),
    Closure {
        params: Vec<Pat>,
        body: Expr,
        env: Env,
    },
    Func {
        name: String,
        equations: Vec<Equation>,
        env: Env,
    },
    Builtin(String, usize),
    PartialBuiltin(String, usize, Vec<Value>),
    Record(Vec<(String, Value)>),
    Unit,
}

Runtime value

Variants

Int(i64)

Float(f64)

Bool(bool)

Str(String)

Char(char)

List(Vec<Value>)

List of values

Con(String, Vec<Value>)

Constructor with tag and fields: Just 42, None

Closure

Closure: captured env + params + body

Fields

params: Vec<Pat>

body: Expr

env: Env

Func

Multi-equation function (pattern matching across equations)

Fields

name: String

equations: Vec<Equation>

env: Env

Builtin(String, usize)

Built-in function

PartialBuiltin(String, usize, Vec<Value>)

Partially applied builtin

Record(Vec<(String, Value)>)

Record value: {name = “Alice”, age = 30}

Unit

Unit (void)

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 Display for Value

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

Formats the value using the given formatter.

impl PartialEq for Value

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Value

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.