builtin

Documentation

Overview

Package builtin provides the Hermes builtin functions.

Index

• func Errorf(where any, msg string, args ...any) any
• func FoldLeft[In, Out any](s []In, init Out, fn func(In, Out) Out) Out
• func FoldRight[In, Out any](s []In, init Out, fn func(In, Out) Out) Out
• func Fresh[ID any]() ID
• func Map[In, Out any]([]In, func(In) Out) []Out
• func MapIndex[In, Out any]([]In, func(int, In) Out) []Out
• func Sorted[Elem cmp.Ordered](Set[Elem]) []Elem
• func Sum[In, Out any]([]In, func(In) Out) Out
• func Zip[In1, In2, Out any](s1 []In1, s2 []In2, fn func(In1, In2) Out) ([]Out, bool)
• type List
  • func Cons[Elem any](head Elem, tail List[Elem]) List[Elem]
  • func ListOf[Elem any](elems ...Elem) List[Elem]
  • func (List[Elem]) Slice() []Elem
• type Maybe
  • func Fmap[In, Out any](Maybe[In], func(In) Out) Maybe[Out]
  • func Just[Elem any](Elem) Maybe[Elem]
  • func (Maybe[Elem]) Get() (Elem, bool)
• type Set
  • func NewSet[Elem comparable](...Elem) Set[Elem]
  • func (Set[Elem]) Difference(...Set[Elem]) Set[Elem]
  • func (Set[Elem]) Empty() bool
  • func (Set[Elem]) Has(Elem) bool
  • func (Set[Elem]) Intersect(...Set[Elem]) Set[Elem]
  • func (Set[Elem]) Len() int
  • func (Set[Elem]) Union(...Set[Elem]) Set[Elem]

Functions

func Errorf

func Errorf(where any, msg string, args ...any) any

Errorf reports an error at the given position.

func FoldLeft

func FoldLeft[In, Out any](s []In, init Out, fn func(In, Out) Out) Out

FoldRight returns fn(s[len-1], fn(s[len-2], ... fn(s[0], init))).

func FoldRight

func FoldRight[In, Out any](s []In, init Out, fn func(In, Out) Out) Out

FoldRight returns fn(s[0], fn(s[1], ... fn(s[len-1], init))).

func Fresh

func Fresh[ID any]() ID

Fresh returns a new, unique identifier.

func Map

func Map[In, Out any]([]In, func(In) Out) []Out

Map returns []Out{fn(s[0]), fn(s[1]), ..., fn(s[len-1])}.

func MapIndex

func MapIndex[In, Out any]([]In, func(int, In) Out) []Out

MapIndex returns []Out{fn(0, s[0]), fn(1, s[1]), ..., fn(len-1, s[len-1])}.

func Sorted

func Sorted[Elem cmp.Ordered](Set[Elem]) []Elem

func Sum

func Sum[In, Out any]([]In, func(In) Out) Out

TODO(mdempsky): Out must be a semigroup.

func Zip

func Zip[In1, In2, Out any](s1 []In1, s2 []In2, fn func(In1, In2) Out) ([]Out, bool)

Zip returns {Just(fn(s1[0], s2[0])), Just(fn(s1[1], s2[1])), ..., Just(fn(s1[len-1], s2[len-1]))}, true, if len(s1) == len(s2). Otherwise, it returns nil, false.

Types

type List

type List[Elem any] opaque

func Cons

func Cons[Elem any](head Elem, tail List[Elem]) List[Elem]

func ListOf

func ListOf[Elem any](elems ...Elem) List[Elem]

func (List[Elem]) Slice

func (List[Elem]) Slice() []Elem

type Maybe

type Maybe[Elem any] opaque

func Fmap

func Fmap[In, Out any](Maybe[In], func(In) Out) Maybe[Out]

func Just

func Just[Elem any](Elem) Maybe[Elem]

func (Maybe[Elem]) Get

func (Maybe[Elem]) Get() (Elem, bool)

type Set

type Set[Elem comparable] opaque

func NewSet

func NewSet[Elem comparable](...Elem) Set[Elem]

func (Set[Elem]) Difference

func (Set[Elem]) Difference(...Set[Elem]) Set[Elem]

func (Set[Elem]) Empty

func (Set[Elem]) Empty() bool

func (Set[Elem]) Has

func (Set[Elem]) Has(Elem) bool

func (Set[Elem]) Intersect

func (Set[Elem]) Intersect(...Set[Elem]) Set[Elem]

func (Set[Elem]) Len

func (Set[Elem]) Len() int

func (Set[Elem]) Union

func (Set[Elem]) Union(...Set[Elem]) Set[Elem]