predicate

Documentation

Overview

Package predicate provides breakable predicate builders

Index

• type Predicate
  • func Always[T any](v bool) Predicate[T]
  • func And[T any](p1, p2 Predicate[T]) Predicate[T]
  • func Eq[T comparable](v T) Predicate[T]
  • func Never[T any](v bool) Predicate[T]
  • func Not[T any](p Predicate[T]) Predicate[T]
  • func Of[T comparable](predicate func(T) bool) Predicate[T]
  • func Or[T any](p1, p2 Predicate[T]) Predicate[T]
  • func Union[T any](predicates ...Predicate[T]) Predicate[T]
  • func Wrap[T any](predicate func(T) bool) Predicate[T]
  • func Xor[T any](p1, p2 Predicate[T]) Predicate[T]
  • func (p Predicate[T]) And(and Predicate[T]) Predicate[T]
  • func (p Predicate[T]) Or(or Predicate[T]) Predicate[T]
  • func (p Predicate[T]) Xor(xor Predicate[T]) Predicate[T]

Types

type Predicate

type Predicate[T any] func(T) (bool, error)

Predicate tests value (converts to true or false) or aborts by an error.

func Always

func Always[T any](v bool) Predicate[T]

Always returns v every time.

func And

func And[T any](p1, p2 Predicate[T]) Predicate[T]

And makes a conjunction of two predicates

func Eq

func Eq[T comparable](v T) Predicate[T]

Eq creates a predicate to test for equality

func Never

func Never[T any](v bool) Predicate[T]

Never returns the negative of v every time

func Not

func Not[T any](p Predicate[T]) Predicate[T]

Not inverts a predicate

func Of

func Of[T comparable](predicate func(T) bool) Predicate[T]

Of breakable Predicate constructor

func Or

func Or[T any](p1, p2 Predicate[T]) Predicate[T]

Or makes a disjunction of two predicates

func Union

func Union[T any](predicates ...Predicate[T]) Predicate[T]

Union applies And to predicates

func Wrap

func Wrap[T any](predicate func(T) bool) Predicate[T]

Wrap converts the specified predicate to the erroreable one

func Xor

func Xor[T any](p1, p2 Predicate[T]) Predicate[T]

Xor makes an exclusive OR of two predicates

func (Predicate[T]) And

func (p Predicate[T]) And(and Predicate[T]) Predicate[T]

And makes conjunction

func (Predicate[T]) Or

func (p Predicate[T]) Or(or Predicate[T]) Predicate[T]

Or makes disjunction

func (Predicate[T]) Xor

func (p Predicate[T]) Xor(xor Predicate[T]) Predicate[T]

Xor makes exclusive OR