scala.reflect.api.Types

Type

abstract type Type >: Null <: Universe.TypeApi

The type of Scala types, and also Scala type signatures. (No difference is internally made between the two).

Source
Types.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
AnnotatedType, BoundedWildcardType, ClassInfoType, CompoundType, ExistentialType, MethodType, NullaryMethodType, PolyType, RefinedType, TypeBounds, TypeRef
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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 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. abstract def orElse(alt: ⇒ Universe.Type): Universe.Type

    Provides an alternate if type is NoType.

    Provides an alternate if type is NoType.

    Definition Classes
    TypeApi
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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

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

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

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

    Definition Classes
    Any
  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  7. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  8. final def eq(arg0: AnyRef): Boolean

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

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

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean

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

    Definition Classes
    AnyRef
  16. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  17. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  18. def toString(): String

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

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from AnyRef

Inherited from Any

Helpers

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