Struct TyCon 

pub struct TyCon(/* private fields */);

A type constructor — the name a concrete type is built from.

A TyCon is an opaque 32-bit tag that the consumer assigns meaning to. This crate stores and compares constructors but never interprets them, so a language front-end is free to map its own primitives and type formers onto whatever tags it likes:

use type_lang::TyCon;

const INT: TyCon = TyCon::new(0);
const BOOL: TyCon = TyCon::new(1);
const FUNCTION: TyCon = TyCon::new(2);
const LIST: TyCon = TyCon::new(3);

Two constructors are the same type former when their tags are equal, so keeping the tag assignment stable across a compilation is the caller’s responsibility — a const table, as above, is the usual way.

Implementations

impl TyCon

pub const fn new(tag: u32) -> Self

Creates a constructor from a tag.

The tag identifies the type former; the caller chooses the numbering and is responsible for keeping it consistent. Equal tags are treated as the same constructor during unification.

Examples

use type_lang::TyCon;

let int = TyCon::new(0);
assert_eq!(int.to_u32(), 0);

pub const fn to_u32(self) -> u32

Returns the raw tag this constructor wraps.

Trait Implementations

impl Clone for TyCon

fn clone(&self) -> TyCon

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TyCon

impl Debug for TyCon

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TyCon

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for TyCon

impl Hash for TyCon

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

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 TyCon

fn cmp(&self, other: &TyCon) -> 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 TyCon

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

fn partial_cmp(&self, other: &TyCon) -> 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 Serialize for TyCon

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TyCon