scala.tools.nsc.typechecker.Implicits

# ImplicitSearch

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

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

Linear Supertypes
Analyzer.ImplicitsContextErrors, Analyzer.Typer, Analyzer.TyperContextErrors, Analyzer.PatternTyper, Analyzer.Tag, Analyzer.Adaptation, Analyzer.TyperDiagnostics, AnyRef, Any
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Inherited

1. ImplicitSearch
2. ImplicitsContextErrors
3. Typer
4. TyperContextErrors
5. PatternTyper
6. Tag
7. Adaptation
8. TyperDiagnostics
9. AnyRef
10. Any

Implicitly

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

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1. Public
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### Instance Constructors

1. #### new ImplicitSearch(tree: Global.Tree, pt: Global.Type, isView: Boolean, context0: Analyzer.Context, pos0: Global.Position = NoPosition)

   tree

     The tree for which the implicit needs to be inserted.

   pt

     The original expected type of the implicit.

   isView

     We are looking for a view

   context0

     The context used for the implicit search

   pos0

     Position that is preferable for use in 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`

### Type Members

1. #### class ImplicitComputation extends AnyRef

   Prune ImplicitInfos down to either all the eligible ones or the best one.

### 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 information
     This member is added by an implicit conversion from Analyzer.ImplicitSearch to any2stringadd[Analyzer.ImplicitSearch] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd

4. #### def ->[B](y: B): (Analyzer.ImplicitSearch, B)

   Implicit information
     This member is added by an implicit conversion from Analyzer.ImplicitSearch to ArrowAssoc[Analyzer.ImplicitSearch] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

5. #### final def ==(arg0: Any): Boolean

   Definition Classes
     AnyRef → Any

6. #### def AmbiguousImplicitError(info1: Analyzer.ImplicitInfo, info2: Analyzer.ImplicitInfo, pre1: String, pre2: String, trailer: String)(isView: Boolean, pt: Global.Type, tree: Global.Tree)(implicit context0: Analyzer.Context): Unit

   Definition Classes
     ImplicitsContextErrors

7. #### def DivergingImplicitExpansionError(tree: Global.Tree, pt: Global.Type, sym: Global.Symbol)(implicit context0: Analyzer.Context): Unit

   Definition Classes
     ImplicitsContextErrors

8. #### object TyperErrorGen

   Definition Classes
     TyperContextErrors

9. #### def adapt(tree: Global.Tree, mode: Mode, pt: Global.Type, original: Global.Tree = EmptyTree): Global.Tree

   Perform the following adaptations of expression, pattern or type `tree` wrt to given mode `mode` and given prototype `pt`: (-1) For expressions with annotated types, let AnnotationCheckers decide what to do (0) Convert expressions with constant types to literals (unless in interactive/scaladoc mode) (1) Resolve overloading, unless mode contains FUNmode (2) Apply parameterless functions (3) Apply polymorphic types to fresh instances of their type parameters and store these instances in context.

   Perform the following adaptations of expression, pattern or type `tree` wrt to given mode `mode` and given prototype `pt`: (-1) For expressions with annotated types, let AnnotationCheckers decide what to do (0) Convert expressions with constant types to literals (unless in interactive/scaladoc mode) (1) Resolve overloading, unless mode contains FUNmode (2) Apply parameterless functions (3) Apply polymorphic types to fresh instances of their type parameters and store these instances in context.undetparams, unless followed by explicit type application. (4) Do the following to unapplied methods used as values: (4.1) If the method has only implicit parameters pass implicit arguments (4.2) otherwise, if `pt` is a function type and method is not a constructor, convert to function by eta-expansion, (4.3) otherwise, if the method is nullary with a result type compatible to `pt` and it is not a constructor, apply it to () otherwise issue an error (5) Convert constructors in a pattern as follows: (5.1) If constructor refers to a case class factory, set tree's type to the unique instance of its primary constructor that is a subtype of the expected type. (5.2) If constructor refers to an extractor, convert to application of unapply or unapplySeq method.

   (6) Convert all other types to TypeTree nodes. (7) When in TYPEmode but not FUNmode or HKmode, check that types are fully parameterized (7.1) In HKmode, higher-kinded types are allowed, but they must have the expected kind-arity (8) When in both EXPRmode and FUNmode, add apply method calls to values of object type. (9) If there are undetermined type variables and not POLYmode, infer expression instance Then, if tree's type is not a subtype of expected type, try the following adaptations: (10) If the expected type is Byte, Short or Char, and the expression is an integer fitting in the range of that type, convert it to that type. (11) Widen numeric literals to their expected type, if necessary (12) When in mode EXPRmode, convert E to { E; () } if expected type is scala.Unit. (13) When in mode EXPRmode, apply AnnotationChecker conversion if expected type is annotated. (14) When in mode EXPRmode, apply a view If all this fails, error

   Attributes
     protected
   Definition Classes
     Typer

10. #### def adaptCase(cdef: Global.CaseDef, mode: Mode, tpe: Global.Type): Global.CaseDef

    Definition Classes
      Typer

11. #### def adaptToArguments(qual: Global.Tree, name: Global.Name, args: List[Global.Tree], pt: Global.Type, reportAmbiguous: Boolean, saveErrors: Boolean): Global.Tree

    Try to apply an implicit conversion to `qual` to that it contains a method `name` which can be applied to arguments `args` with expected type `pt`.

    Try to apply an implicit conversion to `qual` to that it contains a method `name` which can be applied to arguments `args` with expected type `pt`. If `pt` is defined, there is a fallback to try again with pt = ?. This helps avoiding propagating result information too far and solves #1756. If no conversion is found, return `qual` unchanged.

    Definition Classes
      Typer

12. #### def adaptToMember(qual: Global.Tree, searchTemplate: Global.Type, reportAmbiguous: Boolean = true, saveErrors: Boolean = true): Global.Tree

    Definition Classes
      Typer

13. #### def adaptToMemberWithArgs(tree: Global.Tree, qual: Global.Tree, name: Global.Name, mode: Mode, reportAmbiguous: Boolean, saveErrors: Boolean): Global.Tree

    Try to apply an implicit conversion to `qual` so that it contains a method `name`.

    Try to apply an implicit conversion to `qual` so that it contains a method `name`. If that's ambiguous try taking arguments into account using `adaptToArguments`.

    Definition Classes
      Typer

14. #### def adaptToName(qual: Global.Tree, name: Global.Name): Global.Tree

    Try to apply an implicit conversion to `qual` to that it contains a member `name` of arbitrary type.

    Try to apply an implicit conversion to `qual` to that it contains a member `name` of arbitrary type. If no conversion is found, return `qual` unchanged.

    Definition Classes
      Typer

15. #### def allImplicits: List[Analyzer.SearchResult]

16. #### def allImplicitsPoly(tvars: List[Global.TypeVar]): List[(Analyzer.SearchResult, List[Global.TypeConstraint])]

17. #### def applicableInfos(iss: Analyzer.Infoss, isLocalToCallsite: Boolean): Map[Analyzer.ImplicitInfo, Analyzer.SearchResult]

    Computes from a list of lists of implicit infos a map which takes infos which are applicable for given expected type `pt` to their attributed trees.

    Computes from a list of lists of implicit infos a map which takes infos which are applicable for given expected type `pt` to their attributed trees.

    iss

      The given list of lists of implicit infos

    isLocalToCallsite

      Is implicit definition visible without prefix? If this is the case then symbols in preceding lists shadow symbols of the same name in succeeding lists.

    returns

      map from infos to search results

18. #### def applyImplicitArgs(fun: Global.Tree): Global.Tree

    Find implicit arguments and pass them to given tree.

    Find implicit arguments and pass them to given tree.

    Definition Classes
      Typer

19. #### def approximate(tp: Global.Type): Global.Type

    The expected type with all undetermined type parameters replaced with wildcards.

20. #### final def asInstanceOf[T0]: T0

    Definition Classes
      Any

21. #### def atOwner(tree: Global.Tree, owner: Global.Symbol): Analyzer.Typer

    Definition Classes
      Typer

22. #### def atOwner(owner: Global.Symbol): Analyzer.Typer

    Definition Classes
      Typer

23. #### def bestImplicit: Analyzer.SearchResult

    The result of the implicit search: First search implicits visible in current context.

    The result of the implicit search: First search implicits visible in current context. If that fails, search implicits in expected type `pt`.

    todo. the following lines should be deleted after we migrate delegate tag materialization to implicit macros If that fails, and `pt` is an instance of a ClassTag, try to construct a class tag. If that fails, and `pt` is an instance of a TypeTag, try to construct a type tag. If that fails, and `pt` is an instance of a ClassManifest, try to construct a class manifest. If that fails, and `pt` is an instance of a Manifest, try to construct a manifest. If that fails, and `pt` is an instance of a OptManifest, try to construct a class manifest and return NoManifest if construction fails. If all fails return SearchFailure

24. #### def callToCompanionConstr(context: Analyzer.Context, calledFun: Global.Symbol): Boolean

    Definition Classes
      Typer

25. #### def canAdaptConstantTypeToLiteral: Boolean

    Overridden to false in scaladoc and/or interactive.

    Overridden to false in scaladoc and/or interactive.

    Definition Classes
      Typer

26. #### def canTranslateEmptyListToNil: Boolean

    Definition Classes
      Typer

27. #### def checkClassType(tpt: Global.Tree): Boolean

    Check that `tpt` refers to a non-refinement class type

    Check that `tpt` refers to a non-refinement class type

    Definition Classes
      Typer

28. #### object checkDead

    Definition Classes
      TyperDiagnostics

29. #### def checkExistentialsFeature(pos: Global.Position, tpe: Global.Type, prefix: String): AnyVal

    Definition Classes
      Typer

30. #### def checkFeature(pos: Global.Position, featureTrait: Global.Symbol, construct: ⇒ String = "", immediate: Boolean = false): Boolean

    Check whether feature given by `featureTrait` is enabled.

    Check whether feature given by `featureTrait` is enabled. If it is not, issue an error or a warning depending on whether the feature is required.

    construct

      A string expression that is substituted for "#" in the feature description string

    immediate

      When set, feature check is run immediately, otherwise it is run at the end of the typechecking run for the enclosing unit. This is done to avoid potential cyclic reference errors by implicits that are forced too early.

    returns

      if feature check is run immediately: true if feature is enabled, false otherwise if feature check is delayed or suppressed because we are past typer: true

    Definition Classes
      Typer

31. #### def checkFinitary(classinfo: Global.ClassInfoType): Unit

    Definition Classes
      Typer

32. #### def checkMethodStructuralCompatible(ddef: Global.DefDef): Unit

    Check if a structurally defined method violates implementation restrictions.

    Check if a structurally defined method violates implementation restrictions. A method cannot be called if it is a non-private member of a refinement type and if its parameter's types are any of:

    - the self-type of the refinement
    - a type member of the refinement
    - an abstract type declared outside of the refinement.
    - an instance of a value class Furthermore, the result type may not be a value class either
    Definition Classes
      Typer

33. #### object checkNoEscaping extends Global.TypeMap

    Check that type of given tree does not contain local or private components.

34. #### def checkNonCyclic(defn: Global.Tree, tpt: Global.Tree): Unit

    Definition Classes
      Typer

35. #### def checkNonCyclic(sym: Global.Symbol): Unit

    Definition Classes
      Typer

36. #### def checkNonCyclic(pos: Global.Position, tp: Global.Type, lockedSym: Global.Symbol): Boolean

    Definition Classes
      Typer

37. #### def checkNonCyclic(pos: Global.Position, tp: Global.Type): Boolean

    Check that type `tp` is not a subtype of itself.

    Check that type `tp` is not a subtype of itself.

    Definition Classes
      Typer

38. #### def checkParamsConvertible(tree: Global.Tree, tpe0: Global.Type): Unit

    Definition Classes
      Typer

39. #### def checkStablePrefixClassType(tpt: Global.Tree): Boolean

    Check that `tpt` refers to a class type with a stable prefix.

    Check that `tpt` refers to a class type with a stable prefix.

    Definition Classes
      Typer

40. #### object checkUnused

    Definition Classes
      TyperDiagnostics

41. #### def checkValidAdaptation(t: Global.Tree, args: List[Global.Tree]): Boolean

    Definition Classes
      Adaptation

42. #### def clone(): AnyRef

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

43. #### def computeMacroDefType(ddef: Global.DefDef, pt: Global.Type): Global.Type

    Definition Classes
      Typer

44. #### def computeParamAliases(clazz: Global.Symbol, vparamss: List[List[Global.ValDef]], rhs: Global.Tree): Unit

    Enter all aliases of local parameter accessors.

    Enter all aliases of local parameter accessors.

    Definition Classes
      Typer

45. #### def computeType(tree: Global.Tree, pt: Global.Type): Global.Type

    Definition Classes
      Typer

46. #### final def constrTyperIf(inConstr: Boolean): Analyzer.Typer

    The typer for an expression, depending on where we are.

    The typer for an expression, depending on where we are. If we are before a superclass call, this is a typer over a constructor context; otherwise it is the current typer.

    Definition Classes
      Typer

47. #### var context: Analyzer.Context

    Definition Classes
      Typer

48. #### def context1: Analyzer.Context

    Definition Classes
      Typer

49. #### def ctx_s: String

50. #### def cyclicReferenceMessage(sym: Global.Symbol, tree: Global.Tree): Option[String]

    Returns Some(msg) if the given tree is untyped apparently due to a cyclic reference, and None otherwise.

    Returns Some(msg) if the given tree is untyped apparently due to a cyclic reference, and None otherwise.

    Definition Classes
      TyperDiagnostics

51. #### def doTypedApply(tree: Global.Tree, fun0: Global.Tree, args: List[Global.Tree], mode: Mode, pt: Global.Type): Global.Tree

    Definition Classes
      Typer

52. #### def doTypedUnapply(tree: Global.Tree, fun0: Global.Tree, fun: Global.Tree, args: List[Global.Tree], mode: Mode, pt: Global.Type): Global.Tree

    Definition Classes
      PatternTyper

53. #### def dropExistential(tp: Global.Type): Global.Type

    Definition Classes
      Typer

54. #### object dyna

    Definition Classes
      Typer

55. #### def ensuring(cond: (Analyzer.ImplicitSearch) ⇒ Boolean, msg: ⇒ Any): Analyzer.ImplicitSearch

    Implicit information
      This member is added by an implicit conversion from Analyzer.ImplicitSearch to Ensuring[Analyzer.ImplicitSearch] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

56. #### def ensuring(cond: (Analyzer.ImplicitSearch) ⇒ Boolean): Analyzer.ImplicitSearch

    Implicit information
      This member is added by an implicit conversion from Analyzer.ImplicitSearch to Ensuring[Analyzer.ImplicitSearch] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

57. #### def ensuring(cond: Boolean, msg: ⇒ Any): Analyzer.ImplicitSearch

    Implicit information
      This member is added by an implicit conversion from Analyzer.ImplicitSearch to Ensuring[Analyzer.ImplicitSearch] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

58. #### def ensuring(cond: Boolean): Analyzer.ImplicitSearch

    Implicit information
      This member is added by an implicit conversion from Analyzer.ImplicitSearch to Ensuring[Analyzer.ImplicitSearch] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

59. #### def enterSym(txt: Analyzer.Context, tree: Global.Tree): Analyzer.Context

    Attributes
      protected
    Definition Classes
      Typer

60. #### def enterSyms(txt: Analyzer.Context, trees: List[Global.Tree]): Unit

    Attributes
      protected
    Definition Classes
      Typer

61. #### final def eq(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

62. #### def equals(arg0: Any): Boolean

    Definition Classes
      AnyRef → Any

63. #### def extractorForUncheckedType(pos: Global.Position, pt: Global.Type): Global.Tree

    Definition Classes
      PatternTyper

64. #### def failure(what: Any, reason: String, pos: Global.Position = this.pos): Analyzer.SearchResult

65. #### def finalize(): Unit

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )

66. #### def finishMethodSynthesis(templ: Global.Template, clazz: Global.Symbol, context: Analyzer.Context): Global.Template

    In order to override this in the TreeCheckers Typer so synthetics aren't re-added all the time, it is exposed here the module/class typing methods go through it.

    In order to override this in the TreeCheckers Typer so synthetics aren't re-added all the time, it is exposed here the module/class typing methods go through it. ...but it turns out it's also the ideal spot for namer/typer coordination for the tricky method synthesis scenarios, so we'll make it that.

    Attributes
      protected
    Definition Classes
      Typer

67. #### def formatted(fmtstr: String): String

    Implicit information
      This member is added by an implicit conversion from Analyzer.ImplicitSearch to StringFormat[Analyzer.ImplicitSearch] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

68. #### final def getClass(): Class[_]

    Definition Classes
      AnyRef → Any

69. #### def hashCode(): Int

    Definition Classes
      AnyRef → Any

70. #### def improves(info1: Analyzer.ImplicitInfo, info2: Analyzer.ImplicitInfo): Boolean

    Is implicit info `info1` better than implicit info `info2`?

71. #### val infer: Analyzer.Inferencer

    Definition Classes
      Typer

72. #### def inferView(tree: Global.Tree, from: Global.Type, to: Global.Type, reportAmbiguous: Boolean, saveErrors: Boolean): Global.Tree

    Infer an implicit conversion (`view`) between two types.

    Infer an implicit conversion (`view`) between two types.

    tree

      The tree which needs to be converted.

    from

      The source type of the conversion

    to

      The target type of the conversion

    reportAmbiguous

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

    saveErrors

      Should ambiguous and divergent implicit errors that were buffered during the inference of a view be put into the original buffer. False iff we don't care about them.

    Definition Classes
      Typer

73. #### def inferView(tree: Global.Tree, from: Global.Type, to: Global.Type, reportAmbiguous: Boolean): Global.Tree

    Definition Classes
      Typer

74. #### def instantiate(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

    Definition Classes
      Typer

75. #### def instantiateExpectingUnit(tree: Global.Tree, mode: Mode): Global.Tree

    If the expected type is Unit: try instantiating type arguments with expected type Unit, but if that fails, try again with pt = WildcardType and discard the expression.

    If the expected type is Unit: try instantiating type arguments with expected type Unit, but if that fails, try again with pt = WildcardType and discard the expression.

    Definition Classes
      Typer

76. #### def instantiatePossiblyExpectingUnit(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

    Definition Classes
      Typer

77. #### def isCapturedExistential(sym: Global.Symbol): Boolean

    Definition Classes
      Typer

78. #### final def isInstanceOf[T0]: Boolean

    Definition Classes
      Any

79. #### def isNamedApplyBlock(tree: Global.Tree): Boolean

    Is `tree` a block created by a named application?

    Is `tree` a block created by a named application?

    Definition Classes
      Typer

80. #### def isPlausiblyCompatible(tp: Global.Type, pt: Global.Type): Boolean

81. #### def isReferencedFrom(ctx: Analyzer.Context, sym: Global.Symbol): Boolean

    Definition Classes
      Typer

82. #### def isStale(sym: Global.Symbol): Boolean

    A symbol is stale if it is toplevel, to be loaded from a classfile, and the classfile is produced from a sourcefile which is compiled in the current run.

    A symbol is stale if it is toplevel, to be loaded from a classfile, and the classfile is produced from a sourcefile which is compiled in the current run.

    Definition Classes
      Typer

83. #### def isValid(sym: Global.Symbol): Boolean

    Should implicit definition symbol `sym` be considered for applicability testing? This is the case if one of the following holds:

    Should implicit definition symbol `sym` be considered for applicability testing? This is the case if one of the following holds:

    - the symbol's type is initialized
    - the symbol comes from a classfile
    - the symbol comes from a different sourcefile than the current one
    - the symbol and the accessed symbol's definitions come before, and do not contain the closest enclosing definition, // see #3373
    - the symbol's definition is a val, var, or def with an explicit result type The aim of this method is to prevent premature cyclic reference errors by computing the types of only those implicits for which one of these conditions is true.

84. #### def labelTyper(ldef: Global.LabelDef): Analyzer.Typer

    The typer for a label definition.

    The typer for a label definition. If this is part of a template we first have to enter the label definition.

    Definition Classes
      Typer

85. #### def macroImplementationNotFoundMessage(name: Global.Name): String

    This file will be the death of me.

    This file will be the death of me.

    Attributes
      protected
    Definition Classes
      TyperContextErrors

86. #### def member(qual: Global.Tree, name: Global.Name): Global.Symbol

    The member with given name of given qualifier tree

    The member with given name of given qualifier tree

    Definition Classes
      Typer

87. #### def missingSelectErrorTree(tree: Global.Tree, qual: Global.Tree, name: Global.Name): Global.Tree

    Definition Classes
      Typer

88. #### def namer: Analyzer.Namer

    Definition Classes
      Typer

89. #### final def ne(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

90. #### def needsInstantiation(tparams: List[Global.Symbol], formals: List[Global.Type], args: List[Global.Tree]): Boolean

    Does function need to be instantiated, because a missing parameter in an argument closure overlaps with an uninstantiated formal?

    Does function need to be instantiated, because a missing parameter in an argument closure overlaps with an uninstantiated formal?

    Definition Classes
      Typer

91. #### def normSubType(tp: Global.Type, pt: Global.Type): Boolean

92. #### final def notify(): Unit

    Definition Classes
      AnyRef

93. #### final def notifyAll(): Unit

    Definition Classes
      AnyRef

94. #### def packCaptured(tpe: Global.Type): Global.Type

    Definition Classes
      Typer

95. #### def packSymbols(hidden: List[Global.Symbol], tp: Global.Type): Global.Type

    Compute an existential type from raw hidden symbols `syms` and type `tp`

    Compute an existential type from raw hidden symbols `syms` and type `tp`

    Definition Classes
      Typer

96. #### def packedType(tree: Global.Tree, owner: Global.Symbol): Global.Type

    convert local symbols and skolems to existentials

    convert local symbols and skolems to existentials

    Definition Classes
      Typer

97. #### def packedTypes(trees: List[Global.Tree]): List[Global.Type]

    Definition Classes
      Typer

98. #### def permanentlyHiddenWarning(pos: Global.Position, hidden: Global.Name, defn: Global.Symbol): Unit

    Definition Classes
      TyperDiagnostics

99. #### def pos: Global.Position

100. #### def qualifyingClass(tree: Global.Tree, qual: Global.Name, packageOK: Boolean): Global.Symbol

     The qualifying class of a this or super with prefix `qual`.

     The qualifying class of a this or super with prefix `qual`. packageOk is equal false when qualifying class symbol

     Definition Classes
       Typer

101. #### def reallyExists(sym: Global.Symbol): Boolean

     Is symbol defined and not stale?

     Is symbol defined and not stale?

     Definition Classes
       Typer

102. #### def reenterTypeParams(tparams: List[Global.TypeDef]): List[Global.Symbol]

     Definition Classes
       Typer

103. #### def reenterValueParams(vparamss: List[List[Global.ValDef]]): Unit

     Definition Classes
       Typer

104. #### def reportTypeError(context0: Analyzer.Context, pos: Global.Position, ex: Global.TypeError): Unit

     Report a type error.

     Report a type error.

     pos

       The position where to report the error

     ex

       The exception that caused the error

     Definition Classes
       TyperDiagnostics

105. #### def resolveClassTag(pos: Global.Position, tp: Global.Type, allowMaterialization: Boolean = true): Global.Tree

     Finds in scope or materializes a ClassTag.

     Finds in scope or materializes a ClassTag. Should be used instead of ClassManifest every time compiler needs to persist an erasure.

     Once upon a time, we had an `ErasureTag` which was to `ClassTag` the same that `WeakTypeTag` is for `TypeTag`. However we found out that we don't really need this concept, so it got removed.

     pos

       Position for error reporting. Please, provide meaningful value.

     tp

       Type we're looking a ClassTag for, e.g. resolveClassTag(pos, IntTpe) will look for ClassTag[Int].

     allowMaterialization

       If true (default) then the resolver is allowed to launch materialization macros when there's no class tag in scope. If false then materialization macros are prohibited from running.

     Definition Classes
       Tag

106. #### def resolveTypeTag(pos: Global.Position, pre: Global.Type, tp: Global.Type, concrete: Boolean, allowMaterialization: Boolean = true): Global.Tree

     Finds in scope or materializes an WeakTypeTag (if `concrete` is false) or a TypeTag (if `concrete` is true).

     Finds in scope or materializes an WeakTypeTag (if `concrete` is false) or a TypeTag (if `concrete` is true).

     pos

       Position for error reporting. Please, provide meaningful value.

     pre

       Prefix that represents a universe this type tag will be bound to. If `pre` is set to `NoType`, then any type tag in scope will do, regardless of its affiliation. If `pre` is set to `NoType`, and tag resolution involves materialization, then `mkRuntimeUniverseRef` will be used.

     tp

       Type we're looking a TypeTag for, e.g. resolveTypeTag(pos, mkRuntimeUniverseRef, IntTpe, false) will look for scala.reflect.runtime.universe.TypeTag[Int].

     concrete

       If true then the result must not contain unresolved (i.e. not spliced) type parameters and abstract type members. If false then the function will always succeed (abstract types will be reified as free types).

     allowMaterialization

       If true (default) then the resolver is allowed to launch materialization macros when there's no type tag in scope. If false then materialization macros are prohibited from running.

     Definition Classes
       Tag

107. #### def rewrappingWrapperTrees(f: (Global.Tree) ⇒ List[Global.Tree]): (Global.Tree) ⇒ List[Global.Tree]

     For flatMapping a list of trees when you want the DocDefs and Annotated to be transparent.

     For flatMapping a list of trees when you want the DocDefs and Annotated to be transparent.

     Definition Classes
       Typer

108. #### val runDefinitions: reflect.internal.Definitions.definitions.RunDefinitions

     Definition Classes
       Typer

109. #### val searchId: Int

110. #### def searchImplicit(implicitInfoss: Analyzer.Infoss, isLocalToCallsite: Boolean): Analyzer.SearchResult

     Search list of implicit info lists for one matching prototype `pt`.

     Search list of implicit info lists for one matching prototype `pt`. If found return a search result with a tree from found implicit info which is typed with expected type `pt`. Otherwise return SearchFailure.

     implicitInfoss

       The given list of lists of implicit infos

     isLocalToCallsite

       Is implicit definition visible without prefix? If this is the case then symbols in preceding lists shadow symbols of the same name in succeeding lists.

111. #### def silent[T](op: (Analyzer.Typer) ⇒ T, reportAmbiguousErrors: Boolean = context.ambiguousErrors, newtree: Global.Tree = context.tree): Analyzer.SilentResult[T]

     Definition Classes
       Typer

112. #### def stabilize(tree: Global.Tree, pre: Global.Type, mode: Mode, pt: Global.Type): Global.Tree

     Post-process an identifier or selection node, performing the following:

     Post-process an identifier or selection node, performing the following:

     1. Check that non-function pattern expressions are stable (ignoring volatility concerns -- SI-6815) (and narrow the type of modules: a module reference in a pattern has type Foo.type, not "object Foo") 2. Check that packages and static modules are not used as values 3. Turn tree type into stable type if possible and required by context. 4. Give getClass calls a more precise type based on the type of the target of the call.
     Attributes
       protected
     Definition Classes
       Typer

113. #### def stabilizeFun(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

114. #### final def synchronized[T0](arg0: ⇒ T0): T0

     Definition Classes
       AnyRef

115. #### def synthesizePartialFunction(paramName: Global.TermName, paramPos: Global.Position, tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     synthesize and type check a PartialFunction implementation based on the match in `tree`

     synthesize and type check a PartialFunction implementation based on the match in `tree`

     `param => sel match { cases }` becomes:

     new AbstractPartialFunction[$argTp, $matchResTp] { def applyOrElse[A1 <: $argTp, B1 >: $matchResTp]($param: A1, default: A1 => B1): B1 = $selector match { $cases } def isDefinedAt(x: $argTp): Boolean = $selector match { $casesTrue } }

     TODO: it would be nicer to generate the tree specified above at once and type it as a whole, there are two gotchas:

     - matchResTp may not be known until we've typed the match (can only use resTp when it's fully defined),
       - if we typed the match in isolation first, you'd know its result type, but would have to re-jig the owner structure
       - could we use a type variable for matchResTp and backpatch it?
     - occurrences of `this` in `cases` or `sel` must resolve to the this of the class originally enclosing the match, not of the anonymous partial function subclass

     an alternative TODO: add partial function AST node or equivalent and get rid of this synthesis --> do everything in uncurry (or later) however, note that pattern matching codegen is designed to run *before* uncurry

     Definition Classes
       Typer

116. #### def synthesizeSAMFunction(sam: Global.Symbol, fun: Global.Function, resPt: Global.Type, samClassTp: Global.Type, mode: Mode): Global.Tree

     Synthesize and type check the implementation of a type with a Single Abstract Method

     Synthesize and type check the implementation of a type with a Single Abstract Method

     `{ (p1: T1, ..., pN: TN) => body } : S`

     expands to (where `S` is the expected type that defines a single abstract method named `apply`)

     `{ def apply$body(p1: T1, ..., pN: TN): T = body new S { def apply(p1: T1, ..., pN: TN): T = apply$body(p1,..., pN) } }`

     If 'T' is not fully defined, it is inferred by type checking `apply$body` without a result type before type checking the block. The method's inferred result type is used instead of T`. [See test/files/pos/sammy_poly.scala]`

     The `apply` method is identified by the argument `sam`; `S` corresponds to the argument `samClassTp`, and `resPt` is derived from `samClassTp` -- it may be fully defined, or not...

     The function's body is put in a method outside of the class definition to enforce scoping. S's members should not be in scope in `body`.

     The restriction on implicit arguments (neither S's constructor, nor sam may take an implicit argument list), is largely to keep the implementation of type inference (the computation of `samClassTpFullyDefined`) simple.

     NOTE: it would be nicer to not have to type check `apply$body` separately when `T` is not fully defined. However T must be fully defined before we type the instantiation, as it'll end up as a parent type, which must be fully defined. Would be nice to have some kind of mechanism to insert type vars in a block of code, and have the instantiation of the first occurrence propagate to the rest of the block.

     Definition Classes
       Typer

117. #### def toString(): String

     Definition Classes
       AnyRef → Any

118. #### def transformedOr(tree: Global.Tree, op: ⇒ Global.Tree): Global.Tree

     Definition Classes
       Typer

119. #### def transformedOrTyped(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

120. #### def tree_s: String

121. #### def typed(tree: Global.Tree, mode: Mode): Global.Tree

     Definition Classes
       Typer

122. #### def typed(tree: Global.Tree, pt: Global.Type): Global.Tree

     Types expression `tree` with given prototype `pt`.

     Types expression `tree` with given prototype `pt`.

     Definition Classes
       Typer

123. #### def typed(tree: Global.Tree): Global.Tree

     Types expression or definition `tree`.

     Types expression or definition `tree`.

     Definition Classes
       Typer

124. #### def typed(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

125. #### def typed1(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

126. #### def typedAnnotation(ann: Global.Tree, mode: Mode = EXPRmode): Global.AnnotationInfo

     Convert an annotation constructor call into an AnnotationInfo.

     Convert an annotation constructor call into an AnnotationInfo.

     Definition Classes
       Typer

127. #### def typedArg(arg: Global.Tree, mode: Mode, newmode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

128. #### def typedArgs(args: List[Global.Tree], mode: Mode): collection.immutable.List[Global.Tree]

     Definition Classes
       Typer

129. #### def typedArgsForFormals(args: List[Global.Tree], formals: List[Global.Type], mode: Mode): List[Global.Tree]

     Definition Classes
       PatternTyper

130. #### def typedBlock(block0: Global.Block, mode: Mode, pt: Global.Type): Global.Block

     Definition Classes
       Typer

131. #### def typedByValueExpr(tree: Global.Tree, pt: Global.Type = WildcardType): Global.Tree

     Definition Classes
       Typer

132. #### def typedCase(cdef: Global.CaseDef, pattpe: Global.Type, pt: Global.Type): Global.CaseDef

     Definition Classes
       Typer

133. #### def typedCases(cases: List[Global.CaseDef], pattp: Global.Type, pt: Global.Type): List[Global.CaseDef]

     Definition Classes
       Typer

134. #### def typedClassDef(cdef: Global.ClassDef): Global.Tree

     Definition Classes
       Typer

135. #### def typedClassOf(tree: Global.Tree, tpt: Global.Tree, noGen: Boolean = false): Global.Tree

     Definition Classes
       Typer

136. #### def typedConstructorPattern(fun0: Global.Tree, pt: Global.Type): Global.Tree

     Definition Classes
       PatternTyper

137. #### def typedDefDef(ddef: Global.DefDef): Global.DefDef

     Definition Classes
       Typer

138. #### def typedDocDef(docDef: Global.DocDef, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

139. #### def typedExistentialTypeTree(tree: Global.ExistentialTypeTree, mode: Mode): Global.Tree

     Attributes
       protected
     Definition Classes
       Typer

140. #### def typedHigherKindedType(tree: Global.Tree, mode: Mode): Global.Tree

     Definition Classes
       Typer

141. #### def typedHigherKindedType(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Types a higher-kinded type tree -- pt denotes the expected kind and must be one of `Kind.WildCard` and `Kind.FromParams`

     Types a higher-kinded type tree -- pt denotes the expected kind and must be one of `Kind.WildCard` and `Kind.FromParams`

     Definition Classes
       Typer

142. #### def typedImport(imp: Global.Import): Global.Import

     Definition Classes
       Typer

143. #### def typedInPattern(tree: Global.Typed, mode: Mode, pt: Global.Type): Global.Tree

     Attributes
       protected
     Definition Classes
       PatternTyper

144. #### def typedLabelDef(ldef: Global.LabelDef): Global.LabelDef

     Definition Classes
       Typer

145. #### def typedMatch(selector: Global.Tree, cases: List[Global.CaseDef], mode: Mode, pt: Global.Type, tree: Global.Tree = EmptyTree): Global.Match

     Definition Classes
       Typer

146. #### def typedModifiers(mods: Global.Modifiers): Global.Modifiers

     Remove definition annotations from modifiers (they have been saved into the symbol's `annotations` in the type completer / namer)

     Remove definition annotations from modifiers (they have been saved into the symbol's `annotations` in the type completer / namer)

     However reification does need annotation definitions to proceed. Unfortunately, AnnotationInfo doesn't provide enough info to reify it in general case. The biggest problem is with the "atp: Type" field, which cannot be reified in some situations that involve locally defined annotations. See more about that in Reifiers.scala.

     That's why the original tree gets saved into `original` field of AnnotationInfo (happens elsewhere). The field doesn't get pickled/unpickled and exists only during a single compilation run. This simultaneously allows us to reify annotations and to preserve backward compatibility.

     Definition Classes
       Typer

147. #### def typedModuleDef(mdef: Global.ModuleDef): Global.Tree

     Definition Classes
       Typer

148. #### def typedOperator(tree: Global.Tree): Global.Tree

     Types function part of an application

     Types function part of an application

     Definition Classes
       Typer

149. #### def typedParentTypes(templ: Global.Template): List[Global.Tree]

     Definition Classes
       Typer

150. #### def typedPattern(tree: Global.Tree, pt: Global.Type): Global.Tree

     Types a pattern with prototype `pt`

     Types a pattern with prototype `pt`

     Definition Classes
       Typer

151. #### def typedPos(pos: Global.Position)(tree: Global.Tree): Global.Tree

     Definition Classes
       Typer

152. #### def typedPos(pos: Global.Position, mode: Mode, pt: Global.Type)(tree: Global.Tree): Global.Tree

     Definition Classes
       Typer

153. #### def typedQualifier(tree: Global.Tree): Global.Tree

     Definition Classes
       Typer

154. #### def typedQualifier(tree: Global.Tree, mode: Mode): Global.Tree

     Types qualifier `tree` of a select node.

     Types qualifier `tree` of a select node. E.g. is tree occurs in a context like `tree.m`.

     Definition Classes
       Typer

155. #### def typedQualifier(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Types qualifier `tree` of a select node.

     Types qualifier `tree` of a select node. E.g. is tree occurs in a context like `tree.m`.

     Definition Classes
       Typer

156. #### def typedRefinement(templ: Global.Template): Unit

     Definition Classes
       Typer

157. #### def typedStarInPattern(tree: Global.Tree, mode: Mode, pt: Global.Type): Global.Tree

     Attributes
       protected
     Definition Classes
       PatternTyper

158. #### def typedStats(stats: List[Global.Tree], exprOwner: Global.Symbol): List[Global.Tree]

     Definition Classes
       Typer

159. #### def typedTemplate(templ0: Global.Template, parents1: List[Global.Tree]): Global.Template

     Check that inner classes do not inherit from Annotation

     Check that inner classes do not inherit from Annotation

     Definition Classes
       Typer

160. #### def typedType(tree: Global.Tree): Global.Tree

     Types a (fully parameterized) type tree

     Types a (fully parameterized) type tree

     Definition Classes
       Typer

161. #### def typedType(tree: Global.Tree, mode: Mode): Global.Tree

     Types a (fully parameterized) type tree

     Types a (fully parameterized) type tree

     Definition Classes
       Typer

162. #### def typedTypeApply(tree: Global.Tree, mode: Mode, fun: Global.Tree, args: List[Global.Tree]): Global.Tree

     Attributes
       protected
     Definition Classes
       Typer

163. #### def typedTypeConstructor(tree: Global.Tree): Global.Tree

     Definition Classes
       Typer

164. #### def typedTypeConstructor(tree: Global.Tree, mode: Mode): Global.Tree

     Types a type constructor tree used in a new or supertype

     Types a type constructor tree used in a new or supertype

     Definition Classes
       Typer

165. #### def typedTypeDef(tdef: Global.TypeDef): Global.TypeDef

     Definition Classes
       Typer

166. #### def typedValDef(vdef: Global.ValDef): Global.ValDef

     Definition Classes
       Typer

167. #### final def typerWithCondLocalContext[T](c: ⇒ Analyzer.Context)(cond: Boolean)(f: (Analyzer.Typer) ⇒ T): T

     Definition Classes
       Typer
     Annotations
       @inline()

168. #### final def typerWithLocalContext[T](c: Analyzer.Context)(f: (Analyzer.Typer) ⇒ T): T

     Definition Classes
       Typer
     Annotations
       @inline()

169. #### val undetParams: List[Global.Symbol]

     The type parameters to instantiate

170. #### def undet_s: String

171. #### def validateParentClasses(parents: List[Global.Tree], selfType: Global.Type): Unit

     Check that

     Check that

     - all parents are class types,
     - first parent class is not a mixin; following classes are mixins,
     - final classes are not inherited,

     - sealed classes are only inherited by classes which are nested within definition of base class, or that occur within same statement sequence,

     - self-type of current class is a subtype of self-type of each parent class.
     - no two parents define same symbol.
     Definition Classes
       Typer

172. #### def viewExists(from: Global.Type, to: Global.Type): Boolean

     Definition Classes
       Typer

173. #### def virtualizedMatch(match_: Global.Match, mode: Mode, pt: Global.Type): Global.Tree

     Definition Classes
       Typer

174. #### final def wait(): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws( ... )

175. #### final def wait(arg0: Long, arg1: Int): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws( ... )

176. #### final def wait(arg0: Long): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws( ... )

177. #### val wildPt: Global.Type

178. #### final def withCondConstrTyper[T](inConstr: Boolean)(f: (Analyzer.Typer) ⇒ T): T

     Definition Classes
       Typer
     Annotations
       @inline()

179. #### final def withSavedContext[T](c: Analyzer.Context)(f: ⇒ T): T

     Definition Classes
       Typer
     Annotations
       @inline()

180. #### def wrapClassTagUnapply(uncheckedPattern: Global.Tree, classTagExtractor: Global.Tree, pt: Global.Type): Global.Tree

     Definition Classes
       PatternTyper

181. #### def wrapResult(tree: Global.Tree): Analyzer.SearchResult

182. #### def →[B](y: B): (Analyzer.ImplicitSearch, B)

     Implicit information
       This member is added by an implicit conversion from Analyzer.ImplicitSearch to ArrowAssoc[Analyzer.ImplicitSearch] performed by method ArrowAssoc in scala.Predef.
     Definition Classes
       ArrowAssoc

### Inherited from Analyzer.ImplicitsContextErrors

### Inherited from Analyzer.Typer

### Inherited from Analyzer.TyperContextErrors

### Inherited from Analyzer.PatternTyper

### Inherited from Analyzer.Tag

### Inherited from Analyzer.Adaptation

### Inherited from Analyzer.TyperDiagnostics

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from Analyzer.ImplicitSearch to any2stringadd[Analyzer.ImplicitSearch]

### Inherited by implicit conversion StringFormat from Analyzer.ImplicitSearch to StringFormat[Analyzer.ImplicitSearch]

### Inherited by implicit conversion Ensuring from Analyzer.ImplicitSearch to Ensuring[Analyzer.ImplicitSearch]

### Inherited by implicit conversion ArrowAssoc from Analyzer.ImplicitSearch to ArrowAssoc[Analyzer.ImplicitSearch]

### Ungrouped