How to suppress intellij IDEA error in editor when using Binding.scala macro annotation?

问题

Despite it compiles and runs in sbt console. Intellij complains that I should have Binding[Node] instead of Elem in editor.

@dom def renderDiv: Binding[Div] = <div>...</div>

From intellij IDEA's perspective, this method returns a Elem which is a subtype of scala.xml.Node, but when rendering:

dom.render(document.getElementById("root"),renderDiv)

it requires a org.scalajs.dom.raw.Node.

Is there any workaround to this?

回答1:

Could put an implicit conversion def in scope:

package object xxx {
  implicit def makeIntellijHappy[T<:org.scalajs.dom.raw.Node](x: scala.xml.Node): Binding[T] =
    throw new AssertionError("This should never execute.")
}

define method above in the package object, thus it covers the whole package. This method will never be executed, actually.

来源：https://stackoverflow.com/questions/42617401/how-to-suppress-intellij-idea-error-in-editor-when-using-binding-scala-macro-ann