Struct LispFloat

pub(crate) struct LispFloat(GcHeap<f64>);

A wrapper type for floats to work around issues with Eq. Rust only allows types to be used in match statements if they derive Eq. Even if you never actually use that field in a match. So we need a float wrapper that implements that trait.

Tuple Fields

0: GcHeap<f64>

Implementations

impl LispFloat

pub fn new(float: f64, constant: bool) -> Self

Methods from Deref<Target = <GcHeap<f64> as std_ops_Deref>::Target>

const NULL: *mut u8 = {0x0 as *mut u8}

const EMTPTY: AtomicPtr<u8> = _

fn header(&self) -> &GcHeader

pub(in core) fn forward( &self, fwd_ptr: NonNull<u8>, )

pub(in core) fn allocation_state( &self, ) -> AllocState

fn is_marked(&self) -> bool

Trait Implementations

impl<'new> CloneIn<'new, &'new LispFloat> for LispFloat

fn clone_in<const C: bool>(&self, bk: &'new Block<C>) -> Gc<&'new Self>

impl Markable for LispFloat

type Value = NonNull<LispFloat>

fn move_value(&self, to_space: &Bump) -> Option<(Self::Value, bool)>

impl PartialEq for LispFloat

fn eq(&self, other: &LispFloat) -> 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 RootedDeref for LispFloat

type Target = RootedLispFloat

fn rooted_deref(rooted: &Rt<Self>) -> &Self::Target

fn rooted_derefmut(rooted: &mut Rt<Self>) -> &mut Self::Target

impl TaggedPtr for &LispFloat

const TAG: Tag = Tag::Float

Tag value. This is only applicable to base values. Use Int for sum types.

type Ptr = LispFloat

The type of object being pointed to. This will be different for all implementors.

unsafe fn from_obj_ptr(ptr: *const u8) -> Self

Given an untyped pointer, reinterpret to self.

fn get_ptr(self) -> *const Self::Ptr

Get the underlying pointer.

unsafe fn tag_ptr(ptr: *const Self::Ptr) -> Gc<Self>

Given a pointer to Ptr return a Tagged pointer.

fn untag(val: Gc<Self>) -> Self

Remove the tag from the Gc<T> and return the inner type. If it is base type then it will only have a single possible value and can be untagged without checks, but sum types need to create all values they can hold. We use tagged base types to let us reinterpret bits without actually modify them.

fn tag(self) -> Gc<Self>

Given the type, return a tagged version of it. When using a sum type or an immediate value like i64, we override this method to set the proper tag.

impl Trace for LispFloat

fn trace(&self, state: &mut GcState)

impl<'ob> TryFrom<Gc<ObjectType<'ob>>> for &'ob LispFloat

type Error = TypeError

The type returned in the event of a conversion error.

fn try_from(obj: Gc<ObjectType<'ob>>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'old, 'new> WithLifetime<'new> for &'old LispFloat

type Out = &'new LispFloat

unsafe fn with_lifetime(self) -> Self::Out

impl<'ob> From<&LispFloat> for Gc<NumberType<'ob>>

fn from(x: &LispFloat) -> Self

Converts to this type from the input type.

impl<'ob> From<&'ob LispFloat> for Gc<ObjectType<'ob>>

fn from(x: &'ob LispFloat) -> Self

Converts to this type from the input type.

impl Debug for LispFloat

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

Formats the value using the given formatter.

impl Display for LispFloat

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

Formats the value using the given formatter.

impl Deref for LispFloat

type Target = <GcHeap<f64> as Deref>::Target

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Eq for LispFloat

impl GcPtr for &LispFloat

impl StructuralPartialEq for LispFloat