predicate

Documentation

Overview

Package predicate provides predicate builders

Index

• type Predicate
  • func And[T any](p1, p2 Predicate[T]) Predicate[T]
  • func Eq[T comparable](v T) Predicate[T]
  • func Match[Entity, Property any](getter func(Entity) Property, condition Predicate[Property]) Predicate[Entity]
  • func MatchAny[Entity, Property any](getter func(Entity) []Property, condition Predicate[Property]) Predicate[Entity]
  • func Not[T any](p Predicate[T]) Predicate[T]
  • func Or[T any](p1, p2 Predicate[T]) Predicate[T]
  • func Union[T any](predicates ...Predicate[T]) 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

Predicate tests value (converts to true or false).

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 Match

func Match[Entity, Property any](getter func(Entity) Property, condition Predicate[Property]) Predicate[Entity]

Match creates a predicate that tests whether a value of a structure property matches a specified condition

func MatchAny

func MatchAny[Entity, Property any](getter func(Entity) []Property, condition Predicate[Property]) Predicate[Entity]

MatchAny creates a predicate that tests whether any value of a structure property matches a specified condition The property has a slice type.

func Not

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

Not negates the 'p' predicate

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 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