scala source code of finalAlg

/*
 * Copyright 2017 Kailuo Wang
 *
 * 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 mainecoon

import scala.annotation.{StaticAnnotation, compileTimeOnly}
import Util._

import scala.meta._
import collection.immutable.Seq

@compileTimeOnly("Cannot expand @finalAlg")
class finalAlg extends StaticAnnotation {
  inline def apply(defn: Any): Any = meta {

    def enrich(ad: AlgDefn): TypeDefinition = {
      import ad._
      import cls._

     cls.copy(
        companion = companion.addStats( Seq[Stat](
          q"def apply[..${cls.tparams}](implicit inst: $name[..${tArgs()}]): $name[..${tArgs()}] = inst"
        ))
      )
    }
    enrichAlgebra(defn, false)(enrich)
  }
}