Add LoggerFactory instance for NoOpLogger

noop/shared/src/main/scala/org/typelevel/log4cats/noop/NoOpFactory.scala

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Typelevel
+ *
+ * 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 org.typelevel.log4cats
+package noop
+
+import cats.Applicative
+
+object NoOpFactory extends LoggerFactoryGenCompanion {
+  def apply[F[_]: Applicative]: LoggerFactory[F] = instanceFor[F]
+
+  def instanceFor[F[_]](implicit F: Applicative[F]): LoggerFactory[F] = new LoggerFactory[F] {
+    override def getLoggerFromName(name: String): SelfAwareStructuredLogger[F] = {
+      val _ = name
+      NoOpLogger.impl[F]
+    }
+
+    override def fromName(name: String): F[SelfAwareStructuredLogger[F]] =
+      F.pure(getLoggerFromName(name))
+  }
+}