Enum VmValue 

pub enum VmValue {
    Num(f64),
    Bool(bool),
    Sym(String),
}

A runtime value on the VM stack.

Variants

Num(f64)

A 64-bit floating-point number.

Bool(bool)

A boolean flag.

Sym(String)

A symbol (named constant), used in pattern matching.

Implementations

impl VmValue

pub fn as_num(&self) -> Result<f64, VmError>

Extract the numeric payload or return a VmError::TypeMismatch.

pub fn as_bool(&self) -> Result<bool, VmError>

Extract the boolean payload or return a VmError::TypeMismatch.

pub fn is_truthy(&self) -> bool

Numeric: non-zero is truthy; Boolean: direct value; Symbol: always truthy.

Trait Implementations

impl Clone for VmValue

fn clone(&self) -> VmValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VmValue

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

Formats the value using the given formatter.

impl PartialEq for VmValue

fn eq(&self, other: &VmValue) -> 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 StructuralPartialEq for VmValue