Annotation scala.reflect.api.Symbols.TypeSymbol

The overloaded alternatives of this symbol.

A list of annotations attached to this Symbol.

For a class: its companion object if exists. For a module or a module class: companion class of the module if exists. For a package or a package class: NoSymbol. For all others: NoSymbol.

Filters the underlying alternatives (or a single-element list composed of the symbol itself if the symbol is not overloaded). Returns an overloaded symbol is there are multiple matches. Returns a NoSymbol if there are no matches.

The encoded full path name of this symbol, where outer names and inner names are separated by periods.

The type signature of this symbol.

This method always returns signatures in the most generic way possible, even if the underlying symbol is obtained from an instantiation of a generic type. For example, signature of the method def map[B](f: (A) => B): List[B], which refers to the type parameter A of the declaring class List[A], will always feature A, regardless of whether map is loaded from the List[_] or from List[Int]. To get a signature with type parameters appropriately instantiated, one should use infoIn.

The type signature of this symbol seen as a member of given type site.

Is this symbol abstract (i.e. an abstract class, an abstract method, value or type member)?

Is this symbol labelled as "abstract override"?

Does this symbol represent the definition of a type alias?

Does this method represent a constructor?

If owner is a class, then this is a vanilla JVM constructor. If owner is a trait, then this is a mixin constructor.

Is the type parameter represented by this symbol contravariant?

Is the type parameter represented by this symbol contravariant?

Does this symbol represent an existentially bound type?

Is this symbol final?

Does this symbol represent an implementation artifact that isn't meant for public use? Examples of such artifacts are erasure bridges and outer fields.

Does this symbol represent an implicit value, definition, class or parameter?

Is this symbol defined by Java?

Does this symbol represent a java annotation interface?

Does this symbol represent a java enum class or a java enum value?

Is this symbol a macro?

Does this symbol represent the definition of a package? Known issues: https://github.com/scala/bug/issues/6732.

Does this symbol represent a package class? If yes, isClass is also guaranteed to be true.

Is this symbol a parameter (either a method parameter or a type parameter)?

Does this symbol represent a private declaration or definition? If yes, privateWithin might tell more about this symbol's visibility scope.

Does this symbol represent a declaration or definition written in a source file as private[this] or generated in tree/symbol form with the combination of flags LOCAL and PRIVATE? If yes, isPrivate is guaranteed to be true.

Does this symbol represent a protected declaration or definition? If yes, privateWithin might tell more about this symbol's visibility scope.

Does this symbol represent a declaration or definition written in a source file as protected[this] or generated in tree/symbol form with the combination of flags LOCAL and PROTECTED? If yes, isProtected is guaranteed to be true,

Does this symbol represent a public declaration or definition?

Is this symbol a specialized type parameter or a generated specialized member?

Is this symbol static (i.e. with no outer instance)? Q: When exactly is a sym marked as STATIC? A: If it's a member of a toplevel object, or of an object contained in a toplevel object, or any number of levels deep. http://groups.google.com/group/scala-internals/browse_thread/thread/d385bcd60b08faf6

Does this symbol represent a synthetic (i.e. a compiler-generated) entity? Examples of synthetic entities are accessors for vals and vars.

If this is a NoSymbol, returns NoSymbol, otherwise returns the result of applying f to this symbol.

The name of the symbol as a member of the Name type.

Provides an alternate if symbol is a NoSymbol.

Returns all symbols overridden by this symbol.

The owner of this symbol. This is the symbol that directly contains the current symbol's definition. The NoSymbol symbol does not have an owner, and calling this method on one causes an internal error. The owner of the Scala root class scala.reflect.api.Mirror.RootClass and the Scala root object scala.reflect.api.Mirror.RootPackage is NoSymbol. Every other symbol has a chain of owners that ends in scala.reflect.api.Mirror.RootClass.

Position of the tree.

Set when symbol has a modifier of the form private[X] or protected[X], NoSymbol otherwise.

Access level encoding: there are three scala flags (PRIVATE, PROTECTED, and LOCAL) which combine with value privateWithin (the "foo" in private[foo]) to define from where an entity can be accessed. The meanings are as follows:

PRIVATE access restricted to class only. PROTECTED access restricted to class and subclasses only. LOCAL can only be set in conjunction with PRIVATE or PROTECTED. Further restricts access to the same object instance.

In addition, privateWithin can be used to set a visibility barrier. When set, everything contained in the named enclosing package or class has access. It is incompatible with PRIVATE or LOCAL, but is additive with PROTECTED (i.e. if either the flags or privateWithin allow access, then it is allowed.)

The java access levels translate as follows:

java private: isPrivate && (privateWithin == NoSymbol) java package: !isPrivate && !isProtected && (privateWithin == enclosingPackage) java protected: isProtected && (privateWithin == enclosingPackage) java public: !isPrivate && !isProtected && (privateWithin == NoSymbol)

Does the same as filter, but crashes if there are multiple matches.

A type reference that refers to this type symbol. Note if symbol is a member of a class, one almost always is interested in asTypeIn with a site type instead.

Example: Given a class declaration class C[T] { ... } , that generates a symbol C. Then C.toType is the type C[T].

By contrast, C.info would be a type signature of form PolyType(ClassInfoType(...)) that describes type parameters, value parameters, parent types, and members of C.

The type constructor corresponding to this type symbol. This is different from toType in that type parameters are part of results of toType, but not of toTypeConstructor.

Example: Given a class declaration class C[T] { ... } , that generates a symbol C. Then C.toType is the type C[T], but C.toTypeConstructor is C.

A type reference that refers to this type symbol seen as a member of given type site.

For a polymorphic type, its type parameters, the empty list for all other types.

Source file if this symbol is created during this compilation run, or a class file if this symbol is loaded from a *.class or *.jar.

The return type is scala.reflect.io.AbstractFile, which belongs to an experimental part of Scala reflection. It should not be used unless you know what you are doing. In subsequent releases, this API will be refined and exposed as a part of scala.reflect.api.

For a class: the module or case class factory with the same name in the same package. For a module: the class with the same name in the same package. For all others: NoSymbol.

This API may return unexpected results for module classes, packages and package classes. Use companion instead in order to get predictable results.

Does this symbol represent the definition of an abstract type?

This symbol cast to a ClassSymbol representing a class or trait.

This symbol cast to a MethodSymbol.

This symbol cast to a ModuleSymbol defined by an object definition.

This symbol cast to a TermSymbol.

This symbol cast to a TypeSymbol.

Does this symbol represent the definition of a class or trait? If yes, isType is also guaranteed to be true.

Does this symbol represent the definition of a method? If yes, isTerm is also guaranteed to be true.

Does this symbol represent the definition of a module (i.e. it results from an object definition?). If yes, isTerm is also guaranteed to be true.

Does this symbol represent the definition of a class implicitly associated with an object definition (module class in scala compiler parlance)? If yes, isType is also guaranteed to be true.

Used to provide a better error message for asMethod.

Does this symbol represent the definition of a term? Note that every symbol is either a term or a type. So for every symbol sym (except for NoSymbol), either sym.isTerm is true or sym.isType is true.

Does this symbol represent the definition of a type? Note that every symbol is either a term or a type. So for every symbol sym (except for NoSymbol), either sym.isTerm is true or sym.isType is true.