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diff --git a/shared/src/main/scala/spray/json/BasicFormats.scala b/shared/src/main/scala/spray/json/BasicFormats.scala
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+/*
+ * Original implementation (C) 2009-2011 Debasish Ghosh
+ * Adapted and extended in 2011 by Mathias Doenitz
+ *
+ * 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 spray.json
+
+/**
+  * Provides the JsonFormats for the most important Scala types.
+ */
+trait BasicFormats {
+
+  implicit object IntJsonFormat extends JsonFormat[Int] {
+    def write(x: Int) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.intValue
+      case x => deserializationError("Expected Int as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object LongJsonFormat extends JsonFormat[Long] {
+    def write(x: Long) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.longValue
+      case x => deserializationError("Expected Long as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object FloatJsonFormat extends JsonFormat[Float] {
+    def write(x: Float) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.floatValue
+      case JsNull      => Float.NaN
+      case x => deserializationError("Expected Float as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object DoubleJsonFormat extends JsonFormat[Double] {
+    def write(x: Double) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.doubleValue
+      case JsNull      => Double.NaN
+      case x => deserializationError("Expected Double as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object ByteJsonFormat extends JsonFormat[Byte] {
+    def write(x: Byte) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.byteValue
+      case x => deserializationError("Expected Byte as JsNumber, but got " + x)
+    }
+  }
+  
+  implicit object ShortJsonFormat extends JsonFormat[Short] {
+    def write(x: Short) = JsNumber(x)
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.shortValue
+      case x => deserializationError("Expected Short as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object BigDecimalJsonFormat extends JsonFormat[BigDecimal] {
+    def write(x: BigDecimal) = {
+      require(x ne null)
+      JsNumber(x)
+    }
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x
+      case JsString(x) => BigDecimal(x)
+      case x => deserializationError("Expected BigDecimal as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object BigIntJsonFormat extends JsonFormat[BigInt] {
+    def write(x: BigInt) = {
+      require(x ne null)
+      JsNumber(x)
+    }
+    def read(value: JsValue) = value match {
+      case JsNumber(x) => x.toBigInt
+      case JsString(x) => BigInt(x)
+      case x => deserializationError("Expected BigInt as JsNumber, but got " + x)
+    }
+  }
+
+  implicit object UnitJsonFormat extends JsonFormat[Unit] {
+    def write(x: Unit) = JsNumber(1)
+    def read(value: JsValue): Unit = {}
+  }
+
+  implicit object BooleanJsonFormat extends JsonFormat[Boolean] {
+    def write(x: Boolean) = JsBoolean(x)
+    def read(value: JsValue) = value match {
+      case JsTrue => true
+      case JsFalse => false
+      case x => deserializationError("Expected JsBoolean, but got " + x)
+    }
+  }
+
+  implicit object CharJsonFormat extends JsonFormat[Char] {
+    def write(x: Char) = JsString(String.valueOf(x))
+    def read(value: JsValue) = value match {
+      case JsString(x) if x.length == 1 => x.charAt(0)
+      case x => deserializationError("Expected Char as single-character JsString, but got " + x)
+    }
+  }
+  
+  implicit object StringJsonFormat extends JsonFormat[String] {
+    def write(x: String) = {
+      require(x ne null)
+      JsString(x)
+    }
+    def read(value: JsValue) = value match {
+      case JsString(x) => x
+      case x => deserializationError("Expected String as JsString, but got " + x)
+    }
+  }
+  
+  implicit object SymbolJsonFormat extends JsonFormat[Symbol] {
+    def write(x: Symbol) = JsString(x.name)
+    def read(value: JsValue) = value match {
+      case JsString(x) => Symbol(x)
+      case x => deserializationError("Expected Symbol as JsString, but got " + x)
+    }
+  }
+}