Struct kailua_types::ty::RVar

pub struct RVar(_);

Row variables generated by TypeContext.

A row variable #0 (RVar::empty()) denotes a special, inextensible "empty" row variable. This cannot occur from unification, but is required to handle subtyping between records and non-records, which effectively disables any further record extension.

Methods

impl RVar

fn new(id: usize) -> RVar

fn empty() -> RVar

fn any() -> RVar

fn to_usize(&self) -> usize

Trait Implementations

impl Clone for RVar

fn clone(&self) -> RVar

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for RVar

fn eq(&self, __arg_0: &RVar) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &RVar) -> bool

This method tests for !=.

impl Eq for RVar

impl Hash for RVar

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl Debug for RVar

In the debugging output the row variable is denoted <row #rvar>, or ...rvar in the record types.

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

Formats the value using the given formatter.

impl Lattice for RVar

fn assert_sub(&self, other: &Self, ctx: &mut TypeContext) -> TypeResult<()>

Asserts that self is a consistent subtype of other under the type context.

fn assert_eq(&self, other: &Self, ctx: &mut TypeContext) -> TypeResult<()>

Asserts that self is a consistent type equal to other under the type context.