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
    Definition Classes
    nsc
  • class IMain extends Repl with Imports with PresentationCompilation with Closeable

    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
  • replOutput
  • typerOp

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
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
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. Protected

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 toany2stringadd[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 toArrowAssoc[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[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  11. def compile(unit: Global.CompilationUnit): Boolean
  12. def compile(code: String): Boolean
  13. def ensuring(cond: (ReadEvalPrint) => Boolean, msg: => Any): ReadEvalPrint
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toEnsuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: (ReadEvalPrint) => Boolean): ReadEvalPrint
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toEnsuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean, msg: => Any): ReadEvalPrint
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toEnsuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean): ReadEvalPrint
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toEnsuring[ReadEvalPrint] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  19. lazy val evalClass: Class[_]
  20. def evalEither: Either[Throwable, AnyRef]
  21. val evalName: String
  22. def evalPath: String
  23. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  24. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  25. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  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
    Annotations
    @native()
  30. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  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(classOf[java.lang.InterruptedException])
  45. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  46. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Deprecated Value Members

  1. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toStringFormat[ReadEvalPrint] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

  2. def →[B](y: B): (ReadEvalPrint, B)
    Implicit
    This member is added by an implicit conversion from ReadEvalPrint toArrowAssoc[ReadEvalPrint] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromReadEvalPrint to any2stringadd[ReadEvalPrint]

Inherited by implicit conversion StringFormat fromReadEvalPrint to StringFormat[ReadEvalPrint]

Inherited by implicit conversion Ensuring fromReadEvalPrint to Ensuring[ReadEvalPrint]

Inherited by implicit conversion ArrowAssoc fromReadEvalPrint to ArrowAssoc[ReadEvalPrint]

Ungrouped