/*
 * Copyright (C) 2007-2020 Artima, Inc. All rights reserved.
 *
 * 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.
 *
 * Automatically generated Scala interpreter transcript from:
 *
 * Programming in Scala (Fifth Edition)
 * by Martin Odersky, Lex Spoon, Bill Venners, and Frank Sommers
 *
 * http://booksites.artima.com/programming_in_scala_5ed
 */


scala>   // In file ChecksumAccumulator.scala
         class ChecksumAccumulator:
           private var sum = 0
           def add(b: Byte): Unit = sum += b
           def checksum(): Int = ~(sum & 0xFF) + 1

                class ChecksumAccumulator:
                                         ^
On line 2: error: ';' expected but ':' found.

scala>   // In file ChecksumAccumulator.scala
         import scala.collection.mutable
       
         object ChecksumAccumulator:
       
           private val cache = mutable.Map.empty[String, Int]
       
           def calculate(s: String): Int = 
             if cache.contains(s) then
               cache(s)
             else
               val acc = new ChecksumAccumulator
               for c <- s do
                 acc.add((c >> 8).toByte)
                 acc.add(c.toByte)
               val cs = acc.checksum()
               cache += (s -> cs)
               cs

                object ChecksumAccumulator:
                                          ^
On line 4: error: ';' expected but ':' found.
                    if cache.contains(s) then
                       ^
On line 9: error: '(' expected but identifier found.
                    if cache.contains(s) then
                                         ^
On line 9: warning: then is a reserved word (since 2.10.0); usage as an identifier is deprecated
                      val acc = new ChecksumAccumulator
                      ^
On line 12: error: illegal start of simple expression
                      for c <- s do
                          ^
On line 13: error: '(' expected but identifier found.

scala>   import ChecksumAccumulator.calculate
       
         object Summer:
           def main(args: Array[String]): Unit =
             for arg <- args do
               println(arg + ": " + calculate(arg))

                object Summer:
                             ^
On line 3: error: ';' expected but ':' found.

scala> Summer.main(Array("of", "love"))
       ^
       error: not found: value Summer