Trait

scala.tools.nsc.typechecker

Implicits

Related Doc: package typechecker

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trait Implicits extends AnyRef

This trait provides methods to find various kinds of implicits.

Self Type
Analyzer
Source
Implicits.scala
Version

1.0

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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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  1. Public
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Type Members

  1. class ImplicitInfo extends AnyRef

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    A class that records an available implicit

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

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    A class that sets up an implicit search.

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

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

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

  4. class SearchResult extends AnyRef

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    The result of an implicit search

Value Members

  1. final def !=(arg0: Any): Boolean

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    Test two objects for inequality.

    Test two objects for inequality.

    returns

    true if !(this == that), false otherwise.

    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Equivalent to x.hashCode except for boxed numeric types and null.

    Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from Implicits to any2stringadd[Implicits] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Implicits, B)

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    Implicit information
    This member is added by an implicit conversion from Implicits to ArrowAssoc[Implicits] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean

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    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  6. lazy val AmbiguousSearchFailure: Analyzer.SearchResult

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  7. lazy val DivergentSearchFailure: Analyzer.SearchResult

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  8. object Function1

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    An extractor for unary function types arg => res

  9. object HasMember

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

  10. object HasMethodMatching

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

  11. object ImplicitNotFoundMsg

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  12. val NoImplicitInfo: Analyzer.ImplicitInfo

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    A sentinel indicating no implicit was found

  13. lazy val SearchFailure: Analyzer.SearchResult

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  14. def allViewsFrom(tp: Global.Type, context: Analyzer.Context, tpars: List[Global.Symbol]): List[(Analyzer.SearchResult, List[Global.TypeConstraint])]

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    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)

  15. final def asInstanceOf[T0]: T0

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    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown

    ClassCastException if the receiver object is not an instance of the erasure of type T0.

  16. def clone(): AnyRef

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    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

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

    not specified by SLS as a member of AnyRef

  17. def ensuring(cond: (Implicits) ⇒ Boolean, msg: ⇒ Any): Implicits

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    Implicit information
    This member is added by an implicit conversion from Implicits to Ensuring[Implicits] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  18. def ensuring(cond: (Implicits) ⇒ Boolean): Implicits

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    Implicit information
    This member is added by an implicit conversion from Implicits to Ensuring[Implicits] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  19. def ensuring(cond: Boolean, msg: ⇒ Any): Implicits

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    Implicit information
    This member is added by an implicit conversion from Implicits to Ensuring[Implicits] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  20. def ensuring(cond: Boolean): Implicits

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    Implicit information
    This member is added by an implicit conversion from Implicits to Ensuring[Implicits] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  21. final def eq(arg0: AnyRef): Boolean

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    Tests whether the argument (that) is a reference to the receiver object (this).

    Tests whether the argument (that) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  22. def equals(arg0: Any): Boolean

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    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in scala.Any.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    AnyRef → Any
  23. def finalize(): Unit

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    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

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

    not specified by SLS as a member of AnyRef

  24. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from Implicits to StringFormat[Implicits] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  25. final def getClass(): Class[_]

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    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  26. def hashCode(): Int

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    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Definition Classes
    AnyRef → Any
  27. 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

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

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

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    Search for an implicit value.

    Search for an implicit value. 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 is 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 NoPosition, then position-based services will use tree.pos

    returns

    A search result

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

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  30. def inferImplicit(tree: Global.Tree, pt: Global.Type, reportAmbiguous: Boolean, isView: Boolean, context: Analyzer.Context): Analyzer.SearchResult

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  31. final def isInstanceOf[T0]: Boolean

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    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes
    Any
  32. def memberWildcardType(name: Global.Name, tp: Global.Type): Global.Type

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

  33. final def ne(arg0: AnyRef): Boolean

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    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  34. final def notify(): Unit

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    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  35. final def notifyAll(): Unit

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    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  36. def resetImplicits(): Unit

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

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    Definition Classes
    AnyRef
  38. def toString(): String

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    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

    a String representation of the object.

    Definition Classes
    AnyRef → Any
  39. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  40. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  41. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  42. def [B](y: B): (Implicits, B)

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

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Implicits to any2stringadd[Implicits]

Inherited by implicit conversion StringFormat from Implicits to StringFormat[Implicits]

Inherited by implicit conversion Ensuring from Implicits to Ensuring[Implicits]

Inherited by implicit conversion ArrowAssoc from Implicits to ArrowAssoc[Implicits]

Ungrouped