对象circe不是包io的成员

Question

我正在尝试为菊石REPL创建一个predef.sc文件。这就是我所写的

val fs2Version = "2.2.2"
val circeVersion = "0.13.0"

// fs2
interp.load.ivy("co.fs2" %% "fs2-core" % fs2Version)
import scala.collection.immutable.{Stream => _}
import scala.{Stream => _}
import _root_.fs2._

// circe
interp.load.ivy("io.circe" %% "circe-core" % circeVersion)
interp.load.ivy("io.circe" %% "circe-parser" % circeVersion)
interp.load.ivy("io.circe" %% "circe-generic" % circeVersion)
import _root_.io.circe._, _root_.io.circe.parser._, _root_.io.circe.syntax._, _root_.io.circe.optics.JsonPath._, _root_.io.circe.generic.auto._

但它给了我一个错误的说法

object circe is not a member of package io

我想这是因为fs2还有一个叫做"io“的子包

Answer 1

我可以使用下面的predef.sc文件：

import $ivy.`org.typelevel::cats-core:2.1.1`, cats._, cats.implicits._
import $ivy.`org.typelevel::cats-effect:2.1.1`
import $ivy.`co.fs2::fs2-core:2.2.2`
import $ivy.`io.circe::circe-core:0.13.0`
import $ivy.`io.circe::circe-parser:0.13.0`
import $ivy.`io.circe::circe-generic:0.13.0`
import $ivy.`io.circe::circe-optics:0.13.0`
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration._
import scala.concurrent.Future
import scala.util.{Failure, Success}
import scala.concurrent.Await

import scala.collection.immutable.{Stream => _}
import scala.{Stream => _}
import _root_.fs2._

import _root_.io.circe._, _root_.io.circe.parser._, _root_.io.circe.syntax._, _root_.io.circe.optics.JsonPath._, _root_.io.circe.generic.auto._

在此之后所有的进口