Eval

Defer is a type of Eval[A] that is used to defer computations which produce Eval[A].

Users should not instantiate Defer instances themselves. Instead, they will be automatically created when needed.

FlatMap is a type of Eval[A] that is used to chain computations involving .map and .flatMap. Along with Eval#flatMap it implements the trampoline that guarantees stack-safety.

Users should not instantiate FlatMap instances themselves. Instead, they will be automatically created when needed.

Unlike a traditional trampoline, the internal workings of the trampoline are not exposed. This allows a slightly more efficient implementation of the .value method.

A Leaf does not depend on any other Eval so calling .value does not trigger any flatMaps or defers

Construct a lazy Eval[A] value without caching (i.e. Always[A]).

Defer a computation which produces an Eval[A] value.

This is useful when you want to delay execution of an expression which produces an Eval[A] value. Like .flatMap, it is stack-safe.

Construct a lazy Eval[A] value with caching (i.e. Later[A]).

Construct an eager Eval[A] value (i.e. Now[A]).

Static Eval instance for common value false.

This can be useful in cases where the same value may be needed many times.

Static Eval instance for common value 1.

This can be useful in cases where the same value may be needed many times.

Static Eval instance for common value true.

This can be useful in cases where the same value may be needed many times.

Static Eval instance for common value Unit.

This can be useful in cases where the same value may be needed many times.

Static Eval instance for common value 0.

This can be useful in cases where the same value may be needed many times.