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typ

Imagine a *string type: Does this type correspond to a nullable or an undefinable string?

Insecurities about types like the one above are eliminated by using the types of this package. Distinction between undefined, null and concrete values is as important as handling the same data types equally, over the whole application.

Build your own Undefinable[Foo], Nullable[Foo] or even UndefinableNullable[Foo] type with the provided generic types of this package. Even union types are supported by using the AnyOf[AnyOfRuler] generic type.

Example:

import (
	"fmt"
	"github.com/inkognitro/typ"
)

id1 := typ.NewUuidV4()
id2 := typ.UndefinableUuid{}

// Try to convert an undefinable value to a defined one:
if _, ok := id2.ToUuid(); !ok {
    fmt.Println("could not convert id2 to uuid, because the underlying value is undefined")
}

// Comparison between two values:
if id1.ToUndefinableUuid().Equals(id2) {
    fmt.Println("what the heck is going on here")
}