breeze.linalg.support.ScalarOf.scala Maven / Gradle / Ivy
/*
*
* Copyright 2015 David Hall
*
* 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 breeze.linalg.support
/**
* Marker trait indicating that S is the scalar of V. useful for wrangling type inference
*
* @author dlwh
**/
trait ScalarOf[V, S] {
}
object ScalarOf {
object DummyInstance extends ScalarOf[Any, Any]
def dummy[V, S]:ScalarOf[V, S] = DummyInstance.asInstanceOf[ScalarOf[V, S]]
implicit def scalarOfArray[T]:ScalarOf[Array[T], T] = dummy
// @expand
// implicit def scalarOf[@expand.args(Int, Float, Long, Double, Complex, Short) T]:ScalarOf[T, T] = dummy
}