Scala Compiler2.12.2-20170504-135222-21d12e9 < 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 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
-  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.

  Definition Classes
    interpreter
- ComputedImports
- PhaseDependentOps
- PresentationCompileResult
- ReadEvalPrint
- ReplTypeOps
- Request
- deconstruct
- exprTyper
- flatOp
- naming
- parse
- replOutput
- typerOp

c

scala.tools.nsc.interpreter.IMain

# ReadEvalPrint 

###

#### class ReadEvalPrint extends AnyRef

Here is where we:

1) Read some source code, and put it in the "read" object. 2) Evaluate the read object, and put the result in the "eval" object. 3) Create a String for human consumption, and put it in the "print" object.

Read! Eval! Print! Some of that not yet centralized here.

Source
  IMain.scala

Linear Supertypes
AnyRef, Any
Type Hierarchy
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. ReadEvalPrint
2. AnyRef
3. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

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Visibility

1. Public
2. All

### Instance Constructors

1.  new ReadEvalPrint()
2.  new ReadEvalPrint(lineId: Int)

### Type Members

1.  class EvalException extends RuntimeException

### Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##(): Int
   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from ReadEvalPrint to any2stringadd[ReadEvalPrint] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (ReadEvalPrint, B)
   Implicit
     This member is added by an implicit conversion from ReadEvalPrint to ArrowAssoc[ReadEvalPrint] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
7.  def bindError(t: Throwable): String
8.  def call(name: String, args: Any*): AnyRef
9.  def callEither(name: String, args: Any*): Either[Throwable, AnyRef]
10.  def clone(): AnyRef
    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
11.  def compile(source: String): Boolean
12.  def ensuring(cond: (ReadEvalPrint) ⇒ Boolean, msg: ⇒ Any): ReadEvalPrint
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to Ensuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
13.  def ensuring(cond: (ReadEvalPrint) ⇒ Boolean): ReadEvalPrint
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to Ensuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
14.  def ensuring(cond: Boolean, msg: ⇒ Any): ReadEvalPrint
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to Ensuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
15.  def ensuring(cond: Boolean): ReadEvalPrint
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to Ensuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
16.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
17.  def equals(arg0: Any): Boolean
    Definition Classes
      AnyRef → Any
18.  lazy val evalClass: Class[_]
19.  def evalEither: util.Either[Throwable, AnyRef]
20.  val evalName: String
21.  def evalPath: String
22.  def finalize(): Unit
    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
23.  def formatted(fmtstr: String): String
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to StringFormat[ReadEvalPrint] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()
24.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
25.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
26.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
27.  val lineId: Int
28.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
29.  final def notify(): Unit
    Definition Classes
      AnyRef
30.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
31.  def packageDecl: String
32.  val packageName: String
33.  def packaged(code: String): String
34.  def pathTo(name: String): String
35.  def pathToInstance(name: String): String
36.  val printName: String
37.  val readName: String
38.  def readPath: String
39.  def readPathInstance: String
40.  def resolvePathToSymbol(fullAccessPath: String): Global.Symbol

    The innermost object inside the wrapper, found by following accessPath into the outer one.

41.  val resultName: String
42.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
43.  def toString(): String
    Definition Classes
      AnyRef → Any
44.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
45.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
46.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
47.  def →[B](y: B): (ReadEvalPrint, B)
    Implicit
      This member is added by an implicit conversion from ReadEvalPrint to ArrowAssoc[ReadEvalPrint] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from ReadEvalPrint to any2stringadd[ReadEvalPrint]

### Inherited by implicit conversion StringFormat from ReadEvalPrint to StringFormat[ReadEvalPrint]

### Inherited by implicit conversion Ensuring from ReadEvalPrint to Ensuring[ReadEvalPrint]

### Inherited by implicit conversion ArrowAssoc from ReadEvalPrint to ArrowAssoc[ReadEvalPrint]

### Ungrouped