scala.reflect.api.Types

TypeRefApi

trait TypeRefApi extends Universe.TypeApi

The API that all type refs support. The main source of information about types is the scala.reflect.api.Types page.

Self Type
Universe.TypeRef
Source
Types.scala
Linear Supertypes
Universe.TypeApi, AnyRef, Any
Known Subclasses
TypeRef
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Inherited
  1. TypeRefApi
  2. TypeApi
  3. AnyRef
  4. Any
Implicitly
  1. by any2stringadd
  2. by any2stringfmt
  3. by any2ArrowAssoc
  4. by any2Ensuring
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Abstract Value Members

  1. abstract def <:<(that: Universe.Type): Boolean

    Does this type conform to given type argument that?

    Does this type conform to given type argument that?

    Definition Classes
    TypeApi
  2. abstract def =:=(that: Universe.Type): Boolean

    Is this type equivalent to given type argument that?

    Is this type equivalent to given type argument that?

    Definition Classes
    TypeApi
  3. abstract def args: List[Universe.Type]

    The arguments of the type reference.

    The arguments of the type reference. Is equal to Nil if the arguments are not provided.

  4. abstract def asSeenFrom(pre: Universe.Type, clazz: Universe.Symbol): Universe.Type

    This type as seen from prefix pre and class clazz.

    This type as seen from prefix pre and class clazz. This means: Replace all ThisTypes of clazz or one of its subclasses by pre and instantiate all parameters by arguments of pre. Proceed analogously for ThisTypes referring to outer classes.

    Example:

    scala> import scala.reflect.runtime.universe._
    import scala.reflect.runtime.universe._
    
    scala> class D[T] { def m: T = ??? }
    defined class D
    
    scala> class C extends D[Int]
    defined class C
    
    scala> val D = typeOf[D[_]].typeSymbol.asClass
    D: reflect.runtime.universe.ClassSymbol = class D
    
    scala> val C = typeOf[C].typeSymbol.asClass
    C: reflect.runtime.universe.ClassSymbol = class C
    
    scala> val T = D.typeParams(0).asType.toType
    T: reflect.runtime.universe.Type = T
    
    scala> T.asSeenFrom(ThisType(C), D)
    res0: reflect.runtime.universe.Type = scala.Int
    Definition Classes
    TypeApi
  5. abstract def baseClasses: List[Universe.Symbol]

    The list of all base classes of this type (including its own typeSymbol) in linearization order, starting with the class itself and ending in class Any.

    The list of all base classes of this type (including its own typeSymbol) in linearization order, starting with the class itself and ending in class Any.

    Definition Classes
    TypeApi
  6. abstract def baseType(clazz: Universe.Symbol): Universe.Type

    The least type instance of given class which is a super-type of this type.

    The least type instance of given class which is a super-type of this type. Example:

    class D[T]
    class C extends p.D[Int]
    ThisType(C).baseType(D) = p.D[Int]
    Definition Classes
    TypeApi
  7. abstract def contains(sym: Universe.Symbol): Boolean

    Does this type contain a reference to given symbol?

    Does this type contain a reference to given symbol?

    Definition Classes
    TypeApi
  8. abstract def declaration(name: Universe.Name): Universe.Symbol

    The defined or declared members with name name in this type; an OverloadedSymbol if several exist, NoSymbol if none exist.

    The defined or declared members with name name in this type; an OverloadedSymbol if several exist, NoSymbol if none exist. Alternatives of overloaded symbol appear in the order they are declared.

    Definition Classes
    TypeApi
  9. abstract def declarations: Universe.MemberScope

    A Scope containing directly declared members of this type.

    A Scope containing directly declared members of this type. Unlike members this method doesn't returns inherited members.

    Members in the returned scope might appear in arbitrary order. Use declarations.sorted to get an ordered list of members.

    Definition Classes
    TypeApi
  10. abstract def erasure: Universe.Type

    The erased type corresponding to this type after all transformations from Scala to Java have been performed.

    The erased type corresponding to this type after all transformations from Scala to Java have been performed.

    Definition Classes
    TypeApi
  11. abstract def exists(p: (Universe.Type) ⇒ Boolean): Boolean

    Is there part of this type which satisfies predicate p?

    Is there part of this type which satisfies predicate p?

    Definition Classes
    TypeApi
  12. abstract def find(p: (Universe.Type) ⇒ Boolean): Option[Universe.Type]

    Returns optionally first type (in a preorder traversal) which satisfies predicate p, or None if none exists.

    Returns optionally first type (in a preorder traversal) which satisfies predicate p, or None if none exists.

    Definition Classes
    TypeApi
  13. abstract def foreach(f: (Universe.Type) ⇒ Unit): Unit

    Apply f to each part of this type, for side effects only

    Apply f to each part of this type, for side effects only

    Definition Classes
    TypeApi
  14. abstract def map(f: (Universe.Type) ⇒ Universe.Type): Universe.Type

    Apply f to each part of this type, returning a new type.

    Apply f to each part of this type, returning a new type. children get mapped before their parents

    Definition Classes
    TypeApi
  15. abstract def member(name: Universe.Name): Universe.Symbol

    The member with given name, either directly declared or inherited, an OverloadedSymbol if several exist, NoSymbol if none exist.

    The member with given name, either directly declared or inherited, an OverloadedSymbol if several exist, NoSymbol if none exist.

    Definition Classes
    TypeApi
  16. abstract def members: Universe.MemberScope

    A Scope containing all members of this type (directly declared or inherited).

    A Scope containing all members of this type (directly declared or inherited). Unlike declarations this method also returns inherited members.

    Members in the returned scope might appear in arbitrary order. Use declarations.sorted to get an ordered list of members.

    Definition Classes
    TypeApi
  17. abstract def normalize: Universe.Type

    Expands type aliases and converts higher-kinded TypeRefs to PolyTypes.

    Expands type aliases and converts higher-kinded TypeRefs to PolyTypes. Functions on types are also implemented as PolyTypes.

    Example: (in the below, <List> is the type constructor of List) TypeRef(pre, <List>, List()) is replaced by PolyType(X, TypeRef(pre, <List>, List(X)))

    Definition Classes
    TypeApi
  18. abstract def pre: Universe.Type

    The prefix of the type reference.

    The prefix of the type reference. Is equal to NoPrefix if the prefix is not applicable.

  19. abstract def substituteSymbols(from: List[Universe.Symbol], to: List[Universe.Symbol]): Universe.Type

    Substitute symbols in to for corresponding occurrences of references to symbols from in this type.

    Substitute symbols in to for corresponding occurrences of references to symbols from in this type.

    Definition Classes
    TypeApi
  20. abstract def substituteTypes(from: List[Universe.Symbol], to: List[Universe.Type]): Universe.Type

    Substitute types in to for corresponding occurrences of references to symbols from in this type.

    Substitute types in to for corresponding occurrences of references to symbols from in this type.

    Definition Classes
    TypeApi
  21. abstract def sym: Universe.Symbol

    The underlying symbol of the type reference.

  22. abstract def takesTypeArgs: Boolean

    Is this type a type constructor that is missing its type arguments?

    Is this type a type constructor that is missing its type arguments?

    Definition Classes
    TypeApi
  23. abstract def termSymbol: Universe.Symbol

    The term symbol associated with the type, or NoSymbol for types that do not refer to a term symbol.

    The term symbol associated with the type, or NoSymbol for types that do not refer to a term symbol.

    Definition Classes
    TypeApi
  24. abstract def typeConstructor: Universe.Type

    Returns the corresponding type constructor (e.

    Returns the corresponding type constructor (e.g. List for List[T] or List[String])

    Definition Classes
    TypeApi
  25. abstract def typeSymbol: Universe.Symbol

    The type symbol associated with the type, or NoSymbol for types that do not refer to a type symbol.

    The type symbol associated with the type, or NoSymbol for types that do not refer to a type symbol.

    Definition Classes
    TypeApi
  26. abstract def weak_<:<(that: Universe.Type): Boolean

    Does this type weakly conform to given type argument that, i.

    Does this type weakly conform to given type argument that, i.e., either conforms in terms of <:< or both are primitive number types that conform according to Section "Weak Conformance" in the spec. For example, Int weak_<:< Long.

    Definition Classes
    TypeApi
  27. abstract def widen: Universe.Type

    If this is a singleton type, widen it to its nearest underlying non-singleton base type by applying one or more underlying dereferences.

    If this is a singleton type, widen it to its nearest underlying non-singleton base type by applying one or more underlying dereferences. If this is not a singleton type, returns this type itself.

    Example:

    class Outer { class C ; val x: C } val o: Outer <o.x.type>.widen = o.C

    Definition Classes
    TypeApi

Concrete Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Test two objects for inequality.

    Test two objects for inequality.

    returns

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

    Definition Classes
    Any
  3. final def ##(): Int

    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
  4. def +(other: String): String

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

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to ArrowAssoc[Universe.TypeRefApi] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  6. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  7. final def ==(arg0: Any): Boolean

    Test two objects for equality.

    Test two objects for equality. 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
    Any
  8. final def asInstanceOf[T0]: T0

    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.

  9. def clone(): AnyRef

    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

  10. def ensuring(cond: (Universe.TypeRefApi) ⇒ Boolean, msg: ⇒ Any): Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: (Universe.TypeRefApi) ⇒ Boolean): Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: Boolean, msg: ⇒ Any): Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean): Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (arg0) is a reference to the receiver object (this).

    Tests whether the argument (arg0) 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
  15. def equals(arg0: Any): Boolean

    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
  16. def finalize(): Unit

    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

  17. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  18. final def getClass(): Class[_]

    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

  19. def hashCode(): Int

    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
  20. final def isInstanceOf[T0]: Boolean

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

    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
  22. final def notify(): Unit

    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

  23. final def notifyAll(): Unit

    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

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

    Definition Classes
    AnyRef
  25. def toString(): String

    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
  26. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. def [B](y: B): (Universe.TypeRefApi, B)

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to ArrowAssoc[Universe.TypeRefApi] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implicit Value Members

  1. val self: Any

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to StringAdd performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (typeRefApi: StringAdd).self
    Definition Classes
    StringAdd
  2. val self: Any

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to StringFormat performed by method any2stringfmt in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (typeRefApi: StringFormat).self
    Definition Classes
    StringFormat

Deprecated Value Members

  1. def x: Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to ArrowAssoc[Universe.TypeRefApi] performed by method any2ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (typeRefApi: ArrowAssoc[Universe.TypeRefApi]).x
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use leftOfArrow instead

  2. def x: Universe.TypeRefApi

    Implicit information
    This member is added by an implicit conversion from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi] performed by method any2Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (typeRefApi: Ensuring[Universe.TypeRefApi]).x
    Definition Classes
    Ensuring
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use resultOfEnsuring instead

Inherited from Universe.TypeApi

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Universe.TypeRefApi to StringAdd

Inherited by implicit conversion any2stringfmt from Universe.TypeRefApi to StringFormat

Inherited by implicit conversion any2ArrowAssoc from Universe.TypeRefApi to ArrowAssoc[Universe.TypeRefApi]

Inherited by implicit conversion any2Ensuring from Universe.TypeRefApi to Ensuring[Universe.TypeRefApi]

Ungrouped