trait Implicits extends AnyRef

This trait provides methods to find various kinds of implicits.

Self Type
Analyzer
Source
Implicits.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
erasure, treeChecker, ScaladocAnalyzer, InteractiveAnalyzer, Erasure, Duplicator, SpecializationDuplicator, Analyzer, Duplicators, TreeCheckers
Type Hierarchy
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Inherited
  1. Implicits
  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. class ImplicitAnnotationMsg extends AnyRef
  2. class ImplicitInfo extends AnyRef

    A class that records an available implicit

  3. class ImplicitSearch extends Analyzer.Typer with Analyzer.ImplicitsContextErrors

    A class that sets up an implicit search.

    A class that sets up an implicit search. For more info, see comments for inferImplicit.

  4. class Message extends AnyRef
  5. case class OpenImplicit(info: Analyzer.ImplicitInfo, pt: Global.Type, tree: Global.Tree) extends Product with Serializable

    A class which is used to track pending implicits to prevent infinite implicit searches.

  6. class SearchResult extends AnyRef

    The result of an implicit search

Value Members

  1. lazy val AmbiguousSearchFailure: Analyzer.SearchResult
  2. lazy val DivergentSearchFailure: Analyzer.SearchResult
  3. val NoImplicitInfo: Analyzer.ImplicitInfo

    A sentinel indicating no implicit was found

  4. lazy val SearchFailure: Analyzer.SearchResult
  5. def SearchedPrefixImplicitInfo(pre: Global.Type): Analyzer.ImplicitInfo
  6. def allViewsFrom(tp: Global.Type, context: Analyzer.Context, tpars: List[Global.Symbol]): List[(Analyzer.SearchResult, List[Global.TypeConstraint])]

    Find all views from type tp (in which tpars are free)

    Find all views from type tp (in which tpars are free)

    Note that the trees in the search results in the returned list share the same type variables. Ignore their constr field! The list of type constraints returned along with each tree specifies the constraints that must be met by the corresponding type parameter in tpars (for the returned implicit view to be valid).

    tp

    from-type for the implicit conversion

    context

    search implicits here

    tpars

    symbols that should be considered free type variables (implicit search should not try to solve them, just track their constraints)

  7. def inferImplicit(tree: Global.Tree, pt: Global.Type, isView: Boolean, context: Analyzer.Context, silent: Boolean, withMacrosDisabled: Boolean, pos: Global.Position, onError: (Global.Position, String) => Unit): Global.Tree

    A friendly wrapper over inferImplicit to be used in macro contexts and toolboxes.

  8. def inferImplicit(tree: Global.Tree, pt: Global.Type, reportAmbiguous: Boolean, isView: Boolean, context: Analyzer.Context, saveAmbiguousDivergent: Boolean, pos: Global.Position): Analyzer.SearchResult

    Search for an implicit value.

    Search for an implicit value. Consider using one of the convenience methods above. This one has many boolean levers.

    See the comment on result at the end of class ImplicitSearch for more info how the search is conducted.

    tree

    The tree for which the implicit needs to be inserted. (the inference might instantiate some of the undetermined type parameters of that tree.

    pt

    The expected type of the implicit.

    reportAmbiguous

    Should ambiguous implicit errors be reported? False iff we search for a view to find out whether one type is coercible to another.

    isView

    We are looking for a view

    context

    The current context

    saveAmbiguousDivergent

    False if any divergent/ambiguous errors should be ignored after implicits search, true if they should be reported (used in further typechecking).

    pos

    Position that should be used for tracing and error reporting (useful when we infer synthetic stuff and pass EmptyTree in the tree argument) If it's set to NoPosition, then position-based services will use tree.pos

    returns

    A search result

  9. def inferImplicitByType(pt: Global.Type, context: Analyzer.Context, pos: Global.Position = NoPosition): Analyzer.SearchResult
  10. def inferImplicitByTypeSilent(pt: Global.Type, context: Analyzer.Context, pos: Global.Position = NoPosition): Analyzer.SearchResult
  11. def inferImplicitFor(pt: Global.Type, tree: Global.Tree, context: Analyzer.Context, reportAmbiguous: Boolean = true): Analyzer.SearchResult
  12. def inferImplicitView(from: Global.Type, to: Global.Type, tree: Global.Tree, context: Analyzer.Context, reportAmbiguous: Boolean, saveAmbiguousDivergent: Boolean): Analyzer.SearchResult
  13. def memberWildcardType(name: Global.Name, tp: Global.Type): Global.Type

    A constructor for types ?{ def/type name: tp }, used in infer view to member searches.

  14. def resetImplicits(): Unit
  15. object Function1

    An extractor for unary function types arg => res

  16. object HasMember

    An extractor for types of the form ? { name: ? }

  17. object HasMethodMatching

    An extractor for types of the form ? { name: (? >: argtpe <: Any*)restp }

  18. object ImplicitAmbiguousMsg extends Analyzer.ImplicitAnnotationMsg
  19. object ImplicitNotFoundMsg extends Analyzer.ImplicitAnnotationMsg
  20. object OpenImplicit extends java.io.Serializable
  21. object Shadower

Deprecated Value Members

  1. def inferImplicit(tree: Global.Tree, pt: Global.Type, reportAmbiguous: Boolean, isView: Boolean, context: Analyzer.Context, saveAmbiguousDivergent: Boolean): Analyzer.SearchResult
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.0-M4) Unused in scalac

  2. def inferImplicit(tree: Global.Tree, pt: Global.Type, reportAmbiguous: Boolean, isView: Boolean, context: Analyzer.Context): Analyzer.SearchResult
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.0-M4) Unused in scalac