Add expression type string to the REPL API

PR-1131

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/repl/GenericReplEvaluator.kt

@@ -110,7 +110,7 @@ open class GenericReplEvaluator(val baseClasspath: Iterable<File>,
             val resultField = scriptClass.getDeclaredField(SCRIPT_RESULT_FIELD_NAME).apply { isAccessible = true }
             val resultValue: Any? = resultField.get(scriptInstance)
 
-            return if (compileResult.hasResult) ReplEvalResult.ValueResult(resultValue)
+            return if (compileResult.hasResult) ReplEvalResult.ValueResult(resultValue, compileResult.type)
             else ReplEvalResult.UnitResult()
         }
     }

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/repl/ReplApi.kt

@@ -83,7 +83,8 @@ sealed class ReplCompileResult : Serializable {
                           val mainClassName: String,
                           val classes: List<CompiledClassData>,
                           val hasResult: Boolean,
-                          val classpathAddendum: List<File>) : ReplCompileResult()
+                          val classpathAddendum: List<File>,
+                          val type: String?) : ReplCompileResult()
 
     class Incomplete : ReplCompileResult()
 
@@ -110,8 +111,8 @@ interface ReplEvalAction {
 }
 
 sealed class ReplEvalResult : Serializable {
-    class ValueResult(val value: Any?) : ReplEvalResult() {
-        override fun toString(): String = "Result: $value"
+    class ValueResult(val value: Any?, val type: String?) : ReplEvalResult() {
+        override fun toString(): String = "$value : $type"
     }
 
     class UnitResult : ReplEvalResult()