无法在 Scala 2.13 中使用宏解析符号应用

Question

我正在尝试将我的代码库从 2.11.8 升级到 2.13.15 我的 HandOnSuite 特征中有一个错误

trait HandsOnSuite extends AnyFunSpec with Matchers with ScalaFutures {
  def exercice(testName: String)(testFun: Unit)(implicit suite: HandsOnSuite): Unit = macro ExerciceMacro.apply
}

找不到宏定义的

apply

方法

package support

import scala.reflect.macros.blackbox
import scala.reflect.macros.blackbox.Context

class ExerciceMacro[C <: Context](val c: C) {
  import c.universe._

  def apply(testName: c.Expr[String])(testFun: c.Expr[Unit])(suite: c.Expr[HandsOnSuite]): c.Expr[Unit] = {
    val code = testFun.tree.pos.source.content.mkString
    val (start, end) = testFun.tree match {
      case Block(xs, expr) => (testFun.tree.pos.line, expr.pos.line)
      case _ => (testFun.tree.pos.line, testFun.tree.pos.line)
    }
    c.Expr(q"""$suite.testExercice($testName)($testFun)(new support.TestContext($code, $start, $end))""")
  }
}

object ExerciceMacro {
  def apply(c: blackbox.Context)(testName: c.Expr[String])(testFun: c.Expr[Unit])(suite: c.Expr[HandsOnSuite]): c.Expr[Unit] = {
    new ExerciceMacro[c.type](c).apply(testName)(testFun)(suite)
  }
}

有什么关于如何升级的提示吗？ 我找不到一些有关宏的文档

使用 Intellij，我使缓存失效，但它不起作用

Answer 1

尝试更换这个

class ExerciceMacro[C <: Context](val c: C) {
  import c.universe._

  def apply(testName: c.Expr[String])(testFun: c.Expr[Unit])(suite: c.Expr[HandsOnSuite]): c.Expr[Unit] = ...
}

object ExerciceMacro {
  def apply(c: blackbox.Context)(testName: c.Expr[String])(testFun: c.Expr[Unit])(suite: c.Expr[HandsOnSuite]): c.Expr[Unit] = ...
}

这样：

class ExerciceMacro(val c: blackbox.Context) {
  import c.universe._

  def apply(testName: c.Expr[String])(testFun: c.Expr[Unit])(suite: c.Expr[HandsOnSuite]): c.Expr[Unit] = ...
}

// no companion object