Update compiler flags to correct warnings in repl

build.sbt

@@ -11,18 +11,54 @@ git.useGitDescribe := true
 
 scalacOptions ++= Seq(
   "-deprecation",
-  "-encoding", "UTF-8",
-  "-unchecked",
-  "-feature",
-  "-Xlint",
-//  "-Xfatal-warnings",
-  "-Ywarn-dead-code",
-  "-Ypartial-unification"
-//  "-Ydelambdafy:inline" // workaround for future deadlock on the 2.12.1 REPL
+  "-encoding", "utf-8",                // Specify character encoding used by source files.
+  "-explaintypes",                     // Explain type errors in more detail.
+  "-feature",                          // Emit warning and location for usages of features that should be imported explicitly.
+  "-language:existentials",            // Existential types (besides wildcard types) can be written and inferred
+  "-language:experimental.macros",     // Allow macro definition (besides implementation and application)
+  "-language:higherKinds",             // Allow higher-kinded types
+  "-language:implicitConversions",     // Allow definition of implicit functions called views
+  "-unchecked",                        // Enable additional warnings where generated code depends on assumptions.
+  "-Xcheckinit",                       // Wrap field accessors to throw an exception on uninitialized access.
+  "-Xfatal-warnings",                  // Fail the compilation if there are any warnings.
+  "-Xfuture",                          // Turn on future language features.
+  "-Xlint:adapted-args",               // Warn if an argument list is modified to match the receiver.
+  "-Xlint:by-name-right-associative",  // By-name parameter of right associative operator.
+  "-Xlint:constant",                   // Evaluation of a constant arithmetic expression results in an error.
+  "-Xlint:delayedinit-select",         // Selecting member of DelayedInit.
+  "-Xlint:doc-detached",               // A Scaladoc comment appears to be detached from its element.
+  "-Xlint:inaccessible",               // Warn about inaccessible types in method signatures.
+  "-Xlint:infer-any",                  // Warn when a type argument is inferred to be `Any`.
+  "-Xlint:missing-interpolator",       // A string literal appears to be missing an interpolator id.
+  "-Xlint:nullary-override",           // Warn when non-nullary `def f()' overrides nullary `def f'.
+  "-Xlint:nullary-unit",               // Warn when nullary methods return Unit.
+  "-Xlint:option-implicit",            // Option.apply used implicit view.
+  "-Xlint:package-object-classes",     // Class or object defined in package object.
+  "-Xlint:poly-implicit-overload",     // Parameterized overloaded implicit methods are not visible as view bounds.
+  "-Xlint:private-shadow",             // A private field (or class parameter) shadows a superclass field.
+  "-Xlint:stars-align",                // Pattern sequence wildcard must align with sequence component.
+  "-Xlint:type-parameter-shadow",      // A local type parameter shadows a type already in scope.
+  "-Xlint:unsound-match",              // Pattern match may not be typesafe.
+  "-Yno-adapted-args",                 // Do not adapt an argument list (either by inserting () or creating a tuple) to match the receiver.
+  "-Ypartial-unification",             // Enable partial unification in type constructor inference
+  "-Ywarn-dead-code",                  // Warn when dead code is identified.
+  "-Ywarn-extra-implicit",             // Warn when more than one implicit parameter section is defined.
+  "-Ywarn-inaccessible",               // Warn about inaccessible types in method signatures.
+  "-Ywarn-infer-any",                  // Warn when a type argument is inferred to be `Any`.
+  "-Ywarn-nullary-override",           // Warn when non-nullary `def f()' overrides nullary `def f'.
+  "-Ywarn-nullary-unit",               // Warn when nullary methods return Unit.
+  "-Ywarn-numeric-widen",              // Warn when numerics are widened.
+  "-Ywarn-unused:implicits",           // Warn if an implicit parameter is unused.
+  "-Ywarn-unused:imports",             // Warn if an import selector is not referenced.
+  "-Ywarn-unused:locals",              // Warn if a local definition is unused.
+  "-Ywarn-unused:params",              // Warn if a value parameter is unused.
+  "-Ywarn-unused:patvars",             // Warn if a variable bound in a pattern is unused.
+  "-Ywarn-unused:privates",            // Warn if a private member is unused.
+  "-Ywarn-value-discard"               // Warn when non-Unit expression results are unused.
 )
 
 
-scalacOptions in Tut := (scalacOptions in Tut).value.filterNot(Set("-Ywarn-unused-import"))
+scalacOptions in Tut := (scalacOptions in Tut).value.filterNot(Set("-Ywarn-unused-import", "-Ywarn-unused:imports"))
 
 libraryDependencies ++= Seq(
   "net.cilib" %% "cilib-core" % cilibVersion,