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Utilities for writing cross-platform macro logic
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package io.scalaland.chimney.internal.compiletime.fp
trait Applicative[F[_]] extends Functor[F] {
def map2[A, B, C](fa: F[A], fb: F[B])(f: (A, B) => C): F[C]
def pure[A](a: A): F[A]
override def map[A, B](fa: F[A])(f: A => B): F[B] = map2(fa, pure(()))((a, _) => f(a))
}
object Applicative {
def apply[F[_]](implicit F: Applicative[F]): Applicative[F] = F
type Id[A] = A
implicit val IdentityApplicative: Applicative[Id] = new Applicative[Id] {
def map2[A, B, C](fa: A, fb: B)(f: (A, B) => C): C = f(fa, fb)
def pure[A](a: A): A = a
}
final class PureOps[A](private val a: A) extends AnyVal {
def pure[F[_]](implicit F: Applicative[F]): F[A] = F.pure(a)
}
final class Ops[F[_], A](private val fa: F[A]) extends AnyVal {
def map2[B, C](fb: F[B])(f: (A, B) => C)(implicit F: Applicative[F]): F[C] = F.map2(fa, fb)(f)
}
}