Scala Compiler2.12.7 < Back
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# Packages

-  package root

  The Scala compiler and reflection APIs.

  The Scala compiler and reflection APIs.

  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package tools
  Definition Classes
    scala
-  package nsc
  Definition Classes
    tools
-  package ast
  Definition Classes
    nsc
-  package backend
  Definition Classes
    nsc
-  package classpath
  Definition Classes
    nsc
-  package doc
  Definition Classes
    nsc
-  package interactive
  Definition Classes
    nsc
-  package interpreter

  The main REPL related classes and values are as follows.

  The main REPL related classes and values are as follows. In addition to standard compiler classes Global and Settings, there are:

  History: an interface for session history. Completion: an interface for tab completion. ILoop (formerly InterpreterLoop): The umbrella class for a session. IMain (formerly Interpreter): Handles the evolving state of the session and handles submitting code to the compiler and handling the output. InteractiveReader: how ILoop obtains input. History: an interface for session history. Completion: an interface for tab completion. Power: a repository for more advanced/experimental features.

  ILoop contains { in: InteractiveReader, intp: IMain, settings: Settings, power: Power } InteractiveReader contains { history: History, completion: Completion } IMain contains { global: Global }

  Definition Classes
    nsc
-  package session

  Files having to do with the state of a repl session: lines of text entered, types and terms defined, etc.

- AbstractFileClassLoader
- AbstractOrMissingHandler
- CommandLine
- Completion
- Delimited
- EchoReader
- ExprTyper
- ILoop
- IMain
- IMainOps
- ISettings
- Imports
- InteractiveReader
- Javap
- JavapClass
- Logger
- LoopCommands
- MemberHandlers
- NamedParam
- NamedParamClass
- NamedParamCreator
- Naming
- NoCompletion
- NoJavap
- Parsed
- Pasted
- Phased
- Power
- PresentationCompilation
- PresentationCompilerCompleter
- ProcessResult
- ReplConfig
- ReplDir
- ReplGlobal
- ReplOutput
- ReplProps
- ReplReporter
- ReplStrings
- ReplVals
- Results
- RichClass
- Scripted
- SimpleReader
- SplashLoop
- SplashReader
- StdReplTags
- StdReplVals
- Tabulator
- TapMaker
- VariColumnTabulator
- WriterOutputStream
-  package io
  Definition Classes
    nsc
-  package javac
  Definition Classes
    nsc
-  package plugins
  Definition Classes
    nsc
-  package profile
  Definition Classes
    nsc
-  package reporters
  Definition Classes
    nsc
-  package settings
  Definition Classes
    nsc
-  package symtab
  Definition Classes
    nsc
-  package transform
  Definition Classes
    nsc
-  package typechecker
  Definition Classes
    nsc
-  package util
  Definition Classes
    nsc

p

scala.tools.nsc

# interpreter 

#### package interpreter

The main REPL related classes and values are as follows. In addition to standard compiler classes Global and Settings, there are:

History: an interface for session history. Completion: an interface for tab completion. ILoop (formerly InterpreterLoop): The umbrella class for a session. IMain (formerly Interpreter): Handles the evolving state of the session and handles submitting code to the compiler and handling the output. InteractiveReader: how ILoop obtains input. History: an interface for session history. Completion: an interface for tab completion. Power: a repository for more advanced/experimental features.

ILoop contains { in: InteractiveReader, intp: IMain, settings: Settings, power: Power } InteractiveReader contains { history: History, completion: Completion } IMain contains { global: Global }

Source
  package.scala

Linear Supertypes
ReplStrings, ReplConfig, AnyRef, Any
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. interpreter
2. ReplStrings
3. ReplConfig
4. AnyRef
5. Any

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Visibility

1. Public
2. All

### Type Members

1.  class AbstractOrMissingHandler[T] extends PartialFunction[Throwable, T]
2.  class CommandLine extends CompilerCommand

   A command line for the interpreter.

3.  trait Completion extends AnyRef

   An implementation-agnostic completion interface which makes no reference to the jline classes.

4.  trait Delimited extends AnyRef
5.  trait EchoReader extends SimpleReader
6.  trait ExprTyper extends AnyRef
7.  class ILoop extends LoopCommands

   The Scala interactive shell.

   The Scala interactive shell. It provides a read-eval-print loop around the Interpreter class. After instantiation, clients should call the main() method.

   If no in0 is specified, then input will come from the console, and the class will attempt to provide input editing feature such as input history.

   Version

     1.2

8.  class IMain extends Imports with PresentationCompilation

   An interpreter for Scala code.

   An interpreter for Scala code.

   The main public entry points are compile(), interpret(), and bind(). The compile() method loads a complete Scala file. The interpret() method executes one line of Scala code at the request of the user. The bind() method binds an object to a variable that can then be used by later interpreted code.

   The overall approach is based on compiling the requested code and then using a Java classloader and Java reflection to run the code and access its results.

   In more detail, a single compiler instance is used to accumulate all successfully compiled or interpreted Scala code. To "interpret" a line of code, the compiler generates a fresh object that includes the line of code and which has public member(s) to export all variables defined by that code. To extract the result of an interpreted line to show the user, a second "result object" is created which imports the variables exported by the above object and then exports members called "$eval" and "$print". To accommodate user expressions that read from variables or methods defined in previous statements, "import" statements are used.

   This interpreter shares the strengths and weaknesses of using the full compiler-to-Java. The main strength is that interpreted code behaves exactly as does compiled code, including running at full speed. The main weakness is that redefining classes and methods is not handled properly, because rebinding at the Java level is technically difficult.

9.  implicit class IMainOps extends AnyRef

   This class serves to trick the compiler into treating a var (intp, in ILoop) as a stable identifier.

10.  class ISettings extends AnyRef

    Settings for the interpreter

    Settings for the interpreter

    Version

      1.0

11.  trait Imports extends AnyRef
12.  type InputStream = java.io.InputStream
13.  trait InteractiveReader extends AnyRef

    Reads lines from an input stream

14.  type JClass = Class[_]
15.  type JCollection[T] = Collection[T]
16.  type JFile = File
17.  type JList[T] = java.util.List[T]
18.  type JPrintWriter = PrintWriter
19.  abstract class Javap extends AnyRef
20.  class JavapClass extends Javap

    Javap command implementation.

21.  trait Logger extends AnyRef
22.  trait LoopCommands extends AnyRef
23.  trait MemberHandlers extends AnyRef
24.  trait NamedParam extends AnyRef
25.  case class NamedParamClass(name: String, tpe: String, value: Any) extends NamedParam with Product with Serializable
26.  trait NamedParamCreator extends AnyRef
27.  trait Naming extends AnyRef

    This is for name logic which is independent of the compiler (notice there's no Global.) That includes at least generating, metaquoting, mangling, and unmangling.

28.  type OutputStream = java.io.OutputStream
29.  class Parsed extends Delimited

    One instance of a command buffer.

30.  abstract class Pasted extends AnyRef

    If it looks like they're pasting in a scala interpreter transcript, remove all the formatting we inserted so we can make some sense of it.

    If it looks like they're pasting in a scala interpreter transcript, remove all the formatting we inserted so we can make some sense of it.

    Most of the interesting code in here is due to my goal of "paste idempotence" i.e. the transcript resulting from pasting a transcript should itself be pasteable and should achieve the same result.

31.  trait Phased extends AnyRef

    Mix this into an object and use it as a phasing Swiss Army knife.

32.  class Power[ReplValsImpl <: ReplVals] extends AnyRef

    A class for methods to be injected into the intp in power mode.

33.  trait PresentationCompilation extends AnyRef
34.  class PresentationCompilerCompleter extends Completion
35.  class ProcessResult extends AnyRef
36.  trait ReplConfig extends AnyRef
37.  class TapMaker[T] extends AnyRef
    Definition Classes
      ReplConfig
38.  trait ReplDir extends AbstractFile with Clearable

    Directory to save .class files to.

39.  trait ReplGlobal extends Global

    A layer on top of Global so I can guarantee some extra functionality for the repl.

    A layer on top of Global so I can guarantee some extra functionality for the repl. It doesn't do much yet.

40.  class ReplOutput extends AnyRef
41.  class ReplProps extends AnyRef
42.  class ReplReporter extends ConsoleReporter

    Like ReplGlobal, a layer for ensuring extra functionality.

43.  trait ReplStrings extends AnyRef
44.  abstract class ReplVals extends AnyRef

    A class which the repl utilizes to expose predefined objects.

    A class which the repl utilizes to expose predefined objects. The base implementation is empty; the standard repl implementation is StdReplVals.

45.  class RichClass[T] extends AnyRef
46.  class Scripted extends AbstractScriptEngine with Compilable
47.  class SimpleReader extends InteractiveReader

    Reads using standard JDK API.

48.  class SplashLoop extends Runnable

    Collect one line of user input from the supplied reader.

    Collect one line of user input from the supplied reader. Runs on a new thread while the REPL is initializing on the main thread.

    The user can enter text or a `:paste` command.

49.  class SplashReader extends InteractiveReader

    Reader during splash.

    Reader during splash. Handles splash-completion with a stub, otherwise delegates.

50.  trait StdReplTags extends StdTags
51.  class StdReplVals extends ReplVals
52.  trait Tabulator extends AnyRef
53.  trait VariColumnTabulator extends Tabulator

    Adjust the column width and number of columns to minimize the row count.

54.  class WriterOutputStream extends OutputStream
55.  class AbstractFileClassLoader extends util.AbstractFileClassLoader
    Annotations
      @deprecated
    Deprecated

      (Since version 2.11.0) Use `scala.tools.nsc.util.AbstractFileClassLoader`

### Value Members

1.  val IR: Results.type
2.  def any2stringOf(x: Any, maxlen: Int): String
   Definition Classes
     ReplStrings
3.  def isAcross: Boolean
   Definition Classes
     ReplConfig
4.  def isPaged: Boolean
   Definition Classes
     ReplConfig
5.  def isReplDebug: Boolean
   Definition Classes
     ReplConfig
6.  def isReplInfo: Boolean
   Definition Classes
     ReplConfig
7.  def isReplPower: Boolean
   Definition Classes
     ReplConfig
8.  def isReplTrace: Boolean
   Definition Classes
     ReplConfig
9.  implicit def postfixOps: postfixOps
10.  lazy val replProps: ReplProps
    Definition Classes
      ReplConfig
11.  def staticTypeTag[T](implicit arg0: ClassTag[T]): reflect.api.JavaUniverse.TypeTag[T]
12.  def string2code(str: String): String

    Convert a string into code that can recreate the string.

    Convert a string into code that can recreate the string. This requires replacing all special characters by escape codes. It does not add the surrounding " marks.

    Definition Classes
      ReplStrings
13.  def string2codeQuoted(str: String): String
    Definition Classes
      ReplStrings
14.  def unquoted(s: String): String
    Definition Classes
      ReplStrings
15.  def words(s: String): List[String]
    Definition Classes
      ReplStrings
16.  object AbstractOrMissingHandler
17.  object Completion
18.  object ILoop
19.  object IMain

    Utility methods for the Interpreter.

20.  object InteractiveReader
21.  object Javap
22.  object JavapClass
23.  object NamedParam extends NamedParamCreator
24.  object NoCompletion extends Completion
25.  object NoJavap extends Javap
26.  object Parsed
27.  object PresentationCompilerCompleter
28.  object ReplVals
29.  object Results
30.  object Scripted
31.  object SimpleReader
32.  object SplashLoop
33.  object SplashReader
34.  object StdReplTags extends StdTags with StdReplTags

### Inherited from ReplStrings

### Inherited from ReplConfig

### Inherited from AnyRef

### Inherited from Any

### Ungrouped