monix.execution.misc.test.TestBox.scala Maven / Gradle / Ivy
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/*
* Copyright (c) 2014-2019 by The Monix Project Developers.
* See the project homepage at: https://monix.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package monix.execution.misc.test
import monix.execution.misc.{HygieneUtilMacros, InlineMacros}
import scala.reflect.macros.whitebox
/** Represents a boxed value, to be used in the testing
* of [[InlineMacros]].
*/
private[execution] final case class TestBox[A](value: A) {
def map[B](f: A => B): TestBox[B] = macro TestBox.Macros.mapMacroImpl[A, B]
}
/** Represents a boxed value, to be used in the testing
* of [[InlineMacros]].
*/
private[execution] object TestBox {
class Macros(override val c: whitebox.Context) extends InlineMacros with HygieneUtilMacros {
import c.universe._
def mapMacroImpl[A: c.WeakTypeTag, B: c.WeakTypeTag](f: c.Expr[A => B]): c.Expr[TestBox[B]] = {
val selfExpr = c.Expr[TestBox[A]](c.prefix.tree)
val tree =
if (util.isClean(f)) {
q"""
TestBox($f($selfExpr.value))
"""
} else {
val fn = util.name("fn")
q"""
val $fn = $f
TestBox($fn($selfExpr.value))
"""
}
inlineAndReset[TestBox[B]](tree)
}
}
}