Enum PointerObj

pub enum PointerObj {
    UpVal(UpValue),
    SliceMember(GosValue, i32),
    StructField(GosValue, i32),
    PkgMember(PackageKey, i32),
}

There are 4 types of pointers, they point to:

• local
• slice member
• struct field
• package member References to outer function’s local vars and pointers to local vars are all UpValues

Variants

UpVal(UpValue)

SliceMember(GosValue, i32)

StructField(GosValue, i32)

PkgMember(PackageKey, i32)

Implementations

impl PointerObj

pub fn new_closed_up_value(val: &GosValue) -> PointerObj

pub fn new_slice_member( val: GosValue, i: i32, t: ValueType, t_elem: ValueType, ) -> Result<PointerObj, RuntimeError>

pub fn deref( &self, stack: &Stack, pkgs: &PiggyVec<PackageKey, PackageObj>, ) -> Result<GosValue, RuntimeError>

pub fn cast( &self, new_type: ValueType, stack: &Stack, pkgs: &PiggyVec<PackageKey, PackageObj>, ) -> Result<PointerObj, RuntimeError>

cast returns the GosValue the pointer points to, with a new type obviously this is very unsafe, more rigorous checks should be done here.

pub fn set_pointee( &self, val: &GosValue, stack: &mut Stack, pkgs: &PiggyVec<PackageKey, PackageObj>, gcc: &GcContainer, ) -> Result<(), RuntimeError>

set_value is not used by VM, it’s for FFI

Trait Implementations

impl Clone for PointerObj

fn clone(&self) -> PointerObj

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PointerObj

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

Formats the value using the given formatter.

impl Display for PointerObj

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

Formats the value using the given formatter.

impl Hash for PointerObj

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PointerObj

fn cmp(&self, other: &PointerObj) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PointerObj

fn eq(&self, other: &PointerObj) -> 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 PointerObj

fn partial_cmp(&self, other: &PointerObj) -> 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.

impl Eq for PointerObj