Packages

t

scala.tools.nsc.interactive

CompilerControl

trait CompilerControl extends AnyRef

Interface of interactive compiler to a client such as an IDE The model the presentation compiler consists of the following parts:

unitOfFile: The map from sourcefiles to loaded units. A sourcefile/unit is loaded if it occurs in that map.

manipulated by: removeUnitOf, reloadSources.

A call to reloadSources will add the given sources to the loaded units, and start a new background compiler pass to compile all loaded units (with the indicated sources first). Each background compiler pass has its own typer run. The background compiler thread can be interrupted each time an AST node is completely typechecked in the following ways:

  1. by a new call to reloadSources. This starts a new background compiler pass with a new typer run. 2. by a call to askTypeTree. This starts a new typer run if the forceReload parameter = true 3. by a call to askTypeAt, askTypeCompletion, askScopeCompletion, askToDoFirst, askLinkPos, askLastType. 4. by raising an exception in the scheduler. 5. by passing a high-priority action wrapped in ask { ... }.

Actions under 1-3 can themselves be interrupted if they involve typechecking AST nodes. High-priority actions under 5 cannot; they always run to completion. So these high-priority actions should to be short.

Normally, an interrupted action continues after the interrupting action is finished. However, if the interrupting action created a new typer run, the interrupted action is aborted. If there's an outstanding response, it will be set to a Right value with a FreshRunReq exception.

Self Type
Global
Source
CompilerControl.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
Global
Type Hierarchy
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Inherited
  1. CompilerControl
  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. Protected

Type Members

  1. case class AskDocCommentItem(sym: Global.Symbol, source: SourceFile, site: Global.Symbol, fragments: List[(Global.Symbol, SourceFile)], response: Global.Response[(String, String, Global.Position)]) extends Global.WorkItem with Product with Serializable
  2. case class AskLinkPosItem(sym: Global.Symbol, source: SourceFile, response: Global.Response[Global.Position]) extends Global.WorkItem with Product with Serializable
  3. case class AskLoadedTypedItem(source: SourceFile, keepLoaded: Boolean, response: Global.Response[Global.Tree]) extends Global.WorkItem with Product with Serializable
  4. case class AskParsedEnteredItem(source: SourceFile, keepLoaded: Boolean, response: Global.Response[Global.Tree]) extends Global.WorkItem with Product with Serializable
  5. case class AskScopeCompletionItem(pos: Global.Position, response: Global.Response[List[Global.Member]]) extends Global.WorkItem with Product with Serializable
  6. class AskToDoFirstItem extends Global.WorkItem
  7. case class AskTypeAtItem(pos: Global.Position, response: Global.Response[Global.Tree]) extends Global.WorkItem with Product with Serializable
  8. case class AskTypeCompletionItem(pos: Global.Position, response: Global.Response[List[Global.Member]]) extends Global.WorkItem with Product with Serializable
  9. case class AskTypeItem(source: SourceFile, forceReload: Boolean, response: Global.Response[Global.Tree]) extends Global.WorkItem with Product with Serializable
  10. case class FilesDeletedItem(sources: List[SourceFile], response: Global.Response[Unit]) extends Global.WorkItem with Product with Serializable
  11. abstract class Member extends AnyRef

    Info given for every member found by completion

  12. class NoWorkScheduler extends WorkScheduler

    A do-nothing work scheduler that responds immediately with MissingResponse.

    A do-nothing work scheduler that responds immediately with MissingResponse.

    Used during compiler shutdown.

  13. case class ReloadItem(sources: List[SourceFile], response: Global.Response[Unit]) extends Global.WorkItem with Product with Serializable
  14. type Response[T] = interactive.Response[T]
  15. case class ScopeMember(sym: Global.Symbol, tpe: Global.Type, accessible: Boolean, viaImport: Global.Tree) extends Global.Member with Product with Serializable
  16. case class TypeMember(sym: Global.Symbol, tpe: Global.Type, accessible: Boolean, inherited: Boolean, viaView: Global.Symbol) extends Global.Member with Product with Serializable
  17. abstract class WorkItem extends () => Unit

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 CompilerControl toany2stringadd[CompilerControl] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (CompilerControl, B)
    Implicit
    This member is added by an implicit conversion from CompilerControl toArrowAssoc[CompilerControl] 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 ask[A](op: () => A): A

    Asks for a computation to be done quickly on the presentation compiler thread

  8. def askDocComment(sym: Global.Symbol, source: SourceFile, site: Global.Symbol, fragments: List[(Global.Symbol, SourceFile)], response: Global.Response[(String, String, Global.Position)]): Unit

    Sets sync var response to doc comment information for a given symbol.

    Sets sync var response to doc comment information for a given symbol.

    sym

    The symbol whose doc comment should be retrieved (might come from a classfile)

    source

    The source file that's supposed to contain the definition

    site

    The symbol where 'sym' is observed

    fragments

    All symbols that can contribute to the generated documentation together with their source files.

    response

    A response that will be set to the following: If source contains a definition of a given symbol that has a doc comment, the (expanded, raw, position) triplet for a comment, otherwise ("", "", NoPosition). Note: This operation does not automatically load sources that are not yet loaded.

  9. def askFilesDeleted(sources: List[SourceFile], response: Global.Response[Unit]): Unit

    Removes source files and toplevel symbols, and issues a new typer run.

    Removes source files and toplevel symbols, and issues a new typer run. Returns () to syncvar response on completion.

  10. def askForResponse[A](op: () => A): Global.Response[A]

    Asks for a computation to be done on presentation compiler thread, returning a response with the result or an exception

  11. def askLinkPos(sym: Global.Symbol, source: SourceFile, response: Global.Response[Global.Position]): Unit

    Sets sync var response to the position of the definition of the given link in the given sourcefile.

    Sets sync var response to the position of the definition of the given link in the given sourcefile.

    sym

    The symbol referenced by the link (might come from a classfile)

    source

    The source file that's supposed to contain the definition

    response

    A response that will be set to the following: If source contains a definition that is referenced by the given link the position of that definition, otherwise NoPosition. Note: This operation does not automatically load source. If source is unloaded, it stays that way.

  12. final def askLoadedTyped(source: SourceFile, response: Global.Response[Global.Tree]): Unit
  13. def askLoadedTyped(source: SourceFile, keepLoaded: Boolean, response: Global.Response[Global.Tree]): Unit

    If source is not yet loaded, loads it, and starts a new run, otherwise continues with current pass.

    If source is not yet loaded, loads it, and starts a new run, otherwise continues with current pass. Waits until source is fully type checked and returns body in response.

    source

    The source file that needs to be fully typed.

    keepLoaded

    Whether to keep that file in the PC if it was not loaded before. If the file is already loaded, this flag is ignored.

    response

    The response, which is set to the fully attributed tree of source. If the unit corresponding to source has been removed in the meantime the a NoSuchUnitError is raised in the response.

  14. def askParsedEntered(source: SourceFile, keepLoaded: Boolean, response: Global.Response[Global.Tree]): Unit

    Set sync var response to the parse tree of source with all top-level symbols entered.

    Set sync var response to the parse tree of source with all top-level symbols entered.

    source

    The source file to be analyzed

    keepLoaded

    If set to true, source file will be kept as a loaded unit afterwards. If keepLoaded is false the operation is run at low priority, only after everything is brought up to date in a regular type checker run.

    response

    The response.

  15. def askReload(sources: List[SourceFile], response: Global.Response[Unit]): Unit

    Makes sure a set of compilation units is loaded and parsed.

    Makes sure a set of compilation units is loaded and parsed. Returns () to syncvar response on completion. Afterwards a new background compiler run is started with the given sources at the head of the list of to-be-compiled sources.

  16. def askReset(): Unit

    Cancels current compiler run and start a fresh one where everything will be re-typechecked (but not re-loaded).

  17. def askScopeCompletion(pos: Global.Position, response: Global.Response[List[Global.Member]]): Unit

    Sets sync var response to list of members that are visible as members of the scope enclosing pos.

    Sets sync var response to list of members that are visible as members of the scope enclosing pos.

    Note

    Pre-condition: source is loaded

  18. def askShutdown(): Unit

    Tells the compile server to shutdown, and not to restart again

  19. def askStructure(keepSrcLoaded: Boolean)(source: SourceFile, response: Global.Response[Global.Tree]): Unit

    If source if not yet loaded, get an outline view with askParseEntered.

    If source if not yet loaded, get an outline view with askParseEntered. If source is loaded, wait for it to be typechecked. In both cases, set response to parsed (and possibly typechecked) tree.

    keepSrcLoaded

    If set to true, source file will be kept as a loaded unit afterwards.

  20. def askToDoFirst(source: SourceFile): Unit

    Asks to do unit corresponding to given source file on present and subsequent type checking passes.

    Asks to do unit corresponding to given source file on present and subsequent type checking passes. If the file is in the 'crashedFiles' ignore list it is removed and typechecked normally.

  21. def askTypeAt(pos: Global.Position, response: Global.Response[Global.Tree]): Unit

    Sets sync var response to the smallest fully attributed tree that encloses position pos.

    Sets sync var response to the smallest fully attributed tree that encloses position pos. Note: Unlike for most other ask... operations, the source file belonging to pos needs not be loaded.

  22. def askTypeCompletion(pos: Global.Position, response: Global.Response[List[Global.Member]]): Unit

    Sets sync var response to list of members that are visible as members of the tree enclosing pos, possibly reachable by an implicit.

    Sets sync var response to list of members that are visible as members of the tree enclosing pos, possibly reachable by an implicit.

    Note

    Pre-condition: source is loaded

  23. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  24. def doLocateContext(pos: Global.Position): Global.Context

    Returns the smallest context that contains given pos, throws FatalError if none exists.

  25. def ensuring(cond: (CompilerControl) => Boolean, msg: => Any): CompilerControl
    Implicit
    This member is added by an implicit conversion from CompilerControl toEnsuring[CompilerControl] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  26. def ensuring(cond: (CompilerControl) => Boolean): CompilerControl
    Implicit
    This member is added by an implicit conversion from CompilerControl toEnsuring[CompilerControl] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  27. def ensuring(cond: Boolean, msg: => Any): CompilerControl
    Implicit
    This member is added by an implicit conversion from CompilerControl toEnsuring[CompilerControl] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  28. def ensuring(cond: Boolean): CompilerControl
    Implicit
    This member is added by an implicit conversion from CompilerControl toEnsuring[CompilerControl] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  29. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  30. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  31. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  32. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  33. def getUnitOf(s: SourceFile): Option[Global.RichCompilationUnit]

    Return the compilation unit attached to a source file, or None if source is not loaded.

  34. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  35. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  36. def locateContext(pos: Global.Position): Option[Global.Context]

    Locates smallest context that encloses position as an optional value.

  37. def locateTree(pos: Global.Position): Global.Tree

    Locate smallest tree that encloses position

    Locate smallest tree that encloses position

    Note

    Pre-condition: Position must be loaded

  38. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  39. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  40. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  41. def onCompilerThread: Boolean
  42. def onUnitOf[T](source: SourceFile)(op: (Global.RichCompilationUnit) => T): T

    Run operation op on a compilation unit associated with given source.

    Run operation op on a compilation unit associated with given source. If source has a loaded compilation unit, this one is passed to op. Otherwise a new compilation unit is created, but not added to the set of loaded units.

  43. def parseTree(source: SourceFile): Global.Tree

    Returns parse tree for source source.

    Returns parse tree for source source. No symbols are entered. Syntax errors are reported.

    This method is thread-safe and as such can safely run outside of the presentation compiler thread.

  44. def recentlyDeleted(): List[Global.Symbol]

    Returns the top level classes and objects that were deleted in the editor since last time recentlyDeleted() was called.

  45. def removeUnitOf(s: SourceFile): Option[Global.RichCompilationUnit]

    Removes the CompilationUnit corresponding to the given SourceFile from consideration for recompilation.

  46. val scheduler: WorkScheduler

    The scheduler by which client and compiler communicate Must be initialized before starting compilerRunner

    The scheduler by which client and compiler communicate Must be initialized before starting compilerRunner

    Attributes
    protected[interactive]
    Annotations
    @volatile()
  47. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  48. def toString(): String
    Definition Classes
    AnyRef → Any
  49. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  50. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  51. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Deprecated Value Members

  1. def askDocComment(sym: Global.Symbol, site: Global.Symbol, source: SourceFile, response: Global.Response[(String, String, Global.Position)]): Unit
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.2) Use method that accepts fragments

  2. def askType(source: SourceFile, forceReload: Boolean, response: Global.Response[Global.Tree]): Unit

    Sets sync var response to the fully attributed & typechecked tree contained in source.

    Sets sync var response to the fully attributed & typechecked tree contained in source.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) Use askLoadedTyped instead to avoid race conditions in the typechecker

    Note

    Pre-condition: source needs to be loaded.

    ,

    Deprecated because of race conditions in the typechecker when the background compiler is interrupted while typing the same source.

    See also

    scala/bug#6578

  3. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from CompilerControl toStringFormat[CompilerControl] 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.

  4. def →[B](y: B): (CompilerControl, B)
    Implicit
    This member is added by an implicit conversion from CompilerControl toArrowAssoc[CompilerControl] 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 fromCompilerControl to any2stringadd[CompilerControl]

Inherited by implicit conversion StringFormat fromCompilerControl to StringFormat[CompilerControl]

Inherited by implicit conversion Ensuring fromCompilerControl to Ensuring[CompilerControl]

Inherited by implicit conversion ArrowAssoc fromCompilerControl to ArrowAssoc[CompilerControl]

Ungrouped