io.sigs.seals.macros.StringInterpolatorHelper.scala Maven / Gradle / Ivy
/*
* Copyright 2017 Daniel Urban and contributors listed in AUTHORS
*
* 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 io.sigs.seals
package macros
import scala.reflect.macros.blackbox.Context
trait StringInterpolatorHelper {
def extractLiteral(c: Context): String = {
import c.universe._
val s: String = c.prefix.tree match {
case Apply(_, List(Apply(_, List(Literal(Constant(s: String)))))) =>
s
case _ =>
c.abort(c.enclosingPosition, "not a string literal")
}
s
}
}