W3cubDocs

/Scala 2.13 Reflection

Trait scala.reflect.api.Symbols.MethodSymbolApi

trait MethodSymbolApi extends Universe.TermSymbolApi

The API of method symbols. The main source of information about symbols is the Symbols page.

Class Symbol defines isXXX test methods such as isPublic or isFinal, params and returnType methods for method symbols, baseClasses for class symbols and so on. Some of these methods don't make sense for certain subclasses of Symbol and return NoSymbol, Nil or other empty values.

Self Type
Universe.MethodSymbol
Source
Symbols.scala
Linear Supertypes
Universe.TermSymbolApi, Universe.SymbolApi, AnyRef, Any
Known Subclasses
MethodSymbol

Type Members

final type NameType = Universe.TermName

Term symbols have their names of type TermName.

Definition Classes
TermSymbolApiSymbolApi

Abstract Value Members

abstract def accessed: Universe.Symbol

Backing field for an accessor method, NoSymbol for all other term symbols.

Definition Classes
TermSymbolApi

abstract def alternatives: List[Universe.Symbol]

The overloaded alternatives of this symbol.

Definition Classes
SymbolApi

abstract def annotations: List[Universe.Annotation]

A list of annotations attached to this Symbol.

Definition Classes
SymbolApi

abstract def companion: Universe.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.

Definition Classes
SymbolApi

abstract def exceptions: List[Universe.Symbol]

Exceptions that this method is known to throw. For Scala methods, the list is calculated from throws annotations present on a method. For Java methods, the list is calculated from throws clauses attached to the method and stored in bytecode.

abstract def filter(cond: (Universe.Symbol) => Boolean): Universe.Symbol

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.

Definition Classes
SymbolApi

abstract def fullName: String

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

Definition Classes
SymbolApi

abstract def getter: Universe.Symbol

Getter method for a backing field of a val or a val, NoSymbol for all other term symbols.

Definition Classes
TermSymbolApi

abstract def info: Universe.Type

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.

Definition Classes
SymbolApi

abstract def infoIn(site: Universe.Type): Universe.Type

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

Definition Classes
SymbolApi

abstract def isAbstract: Boolean

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

Definition Classes
SymbolApi

abstract def isAbstractOverride: Boolean

Is this symbol labelled as "abstract override"?

Definition Classes
SymbolApi

abstract def isAccessor: Boolean

Does this symbol represent a getter or a setter?

Definition Classes
TermSymbolApi

abstract def isByNameParam: Boolean

Does this symbol represent a by-name parameter?

Definition Classes
TermSymbolApi

abstract def isCaseAccessor: Boolean

Does this symbol represent a field of a case class that corresponds to a parameter in the first parameter list of the primary constructor of that class?

Definition Classes
TermSymbolApi

abstract def isConstructor: Boolean

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.

Definition Classes
SymbolApi

abstract def isFinal: Boolean

Is this symbol final?

Definition Classes
SymbolApi

abstract def isGetter: Boolean

Does this symbol represent a getter of a field? If yes, isMethod is also guaranteed to be true.

Definition Classes
TermSymbolApi

abstract def isImplementationArtifact: Boolean

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

Definition Classes
SymbolApi

abstract def isImplicit: Boolean

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

Definition Classes
SymbolApi

abstract def isJava: Boolean

Is this symbol defined by Java?

Definition Classes
SymbolApi

abstract def isJavaAnnotation: Boolean

Does this symbol represent a java annotation interface?

Definition Classes
SymbolApi

abstract def isJavaEnum: Boolean

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

Definition Classes
SymbolApi

abstract def isLazy: Boolean

Does this symbol represent a lazy value?

Definition Classes
TermSymbolApi

abstract def isMacro: Boolean

Is this symbol a macro?

Definition Classes
SymbolApi

abstract def isOverloaded: Boolean

Does this symbol represent an overloaded method? If yes, isMethod is false, and the list of the enclosed alternatives can be found out via alternatives.

Definition Classes
TermSymbolApi

abstract def isPackage: Boolean

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

Definition Classes
SymbolApi

abstract def isPackageClass: Boolean

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

Definition Classes
SymbolApi

abstract def isParamAccessor: Boolean

Does this symbol represent a field of a class that was generated from a parameter of that class?

Definition Classes
TermSymbolApi

abstract def isParamWithDefault: Boolean

Does this symbol represent a parameter with a default value?

Definition Classes
TermSymbolApi

abstract def isParameter: Boolean

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

Definition Classes
SymbolApi

abstract def isPrimaryConstructor: Boolean

abstract def isPrivate: Boolean

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

Definition Classes
SymbolApi

abstract def isPrivateThis: Boolean

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.

Definition Classes
SymbolApi

abstract def isProtected: Boolean

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

Definition Classes
SymbolApi

abstract def isProtectedThis: Boolean

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,

Definition Classes
SymbolApi

abstract def isPublic: Boolean

Does this symbol represent a public declaration or definition?

Definition Classes
SymbolApi

abstract def isSetter: Boolean

Does this symbol represent a setter of a field? If yes, isMethod is also guaranteed to be true.

Definition Classes
TermSymbolApi

abstract def isSpecialized: Boolean

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

Definition Classes
SymbolApi

abstract def isStable: Boolean

Does this symbol denote a stable value?

Definition Classes
TermSymbolApi

abstract def isStatic: Boolean

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

Definition Classes
SymbolApi

abstract def isSynthetic: Boolean

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

Definition Classes
SymbolApi

abstract def isVal: Boolean

Is this symbol introduced as val?

Definition Classes
TermSymbolApi

abstract def isVar: Boolean

Is this symbol introduced as var?

Definition Classes
TermSymbolApi

abstract def isVarargs: Boolean

abstract def map(f: (Universe.Symbol) => Universe.Symbol): Universe.Symbol

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

Definition Classes
SymbolApi

abstract def name: MethodSymbol.NameType

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

Definition Classes
SymbolApi

abstract def orElse(alt: => Universe.Symbol): Universe.Symbol

Provides an alternate if symbol is a NoSymbol.

Definition Classes
SymbolApi

abstract def overrides: List[Universe.Symbol]

Returns all symbols overridden by this symbol.

Definition Classes
SymbolApi

abstract def owner: Universe.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.

Definition Classes
SymbolApi

abstract def paramLists: List[List[Universe.Symbol]]

All parameter lists of the method.

Can be used to distinguish nullary methods and methods with empty parameter lists. For a nullary method, returns the empty list (i.e. List()). For a method with an empty parameter list, returns a list that contains the empty list (i.e. List(List())).

abstract def pos: Universe.Position

Position of the tree.

Definition Classes
SymbolApi

abstract def privateWithin: Universe.Symbol

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)

Definition Classes
SymbolApi

abstract def returnType: Universe.Type

abstract def setter: Universe.Symbol

Setter method for a backing field of a val or a val, NoSymbol for all other term symbols.

Definition Classes
TermSymbolApi

abstract def suchThat(cond: (Universe.Symbol) => Boolean): Universe.Symbol

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

Definition Classes
SymbolApi

abstract def typeParams: List[Universe.Symbol]

abstract def typeSignature: Universe.Type

Definition Classes
SymbolApi
See also

info

abstract def typeSignatureIn(site: Universe.Type): Universe.Type

Definition Classes
SymbolApi
See also

infoIn

abstract def allOverriddenSymbols: List[Universe.Symbol]

Definition Classes
SymbolApi
Annotations
@deprecated
Deprecated

(Since version 2.11.0) use overrides instead

See also

overrides

abstract def associatedFile: AbstractFile

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.

Definition Classes
SymbolApi
Annotations
@deprecated
Deprecated

(Since version 2.11.0) use pos.source.file instead

abstract def companionSymbol: Universe.Symbol

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.

Definition Classes
SymbolApi
Annotations
@deprecated
Deprecated

(Since version 2.11.0) use companion instead, but beware of possible changes in behavior

abstract def paramss: List[List[Universe.Symbol]]

Annotations
@deprecated
Deprecated

(Since version 2.11.0) use paramLists instead

See also

paramLists The name ending with "ss" indicates that the result type is a list of lists.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any

final def ##(): Int

Definition Classes
AnyRef → Any

def +(other: String): String

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toany2stringadd[Universe.MethodSymbolApi] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd

def ->[B](y: B): (Universe.MethodSymbolApi, B)

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toArrowAssoc[Universe.MethodSymbolApi] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()

final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any

def asClass: Universe.ClassSymbol

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

Definition Classes
SymbolApi
Exceptions thrown

ScalaReflectionException if isClass is false.

final def asInstanceOf[T0]: T0

Definition Classes
Any

final def asMethod: Universe.MethodSymbol

This symbol cast to a MethodSymbol.

Definition Classes
MethodSymbolApiSymbolApi
Exceptions thrown

ScalaReflectionException if isMethod is false.

def asModule: Universe.ModuleSymbol

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

Definition Classes
SymbolApi
Exceptions thrown

ScalaReflectionException if isModule is false.

final def asTerm: Universe.TermSymbol

This symbol cast to a TermSymbol.

Definition Classes
TermSymbolApiSymbolApi
Exceptions thrown

ScalaReflectionException if isTerm is false.

def asType: Universe.TypeSymbol

This symbol cast to a TypeSymbol.

Definition Classes
SymbolApi
Exceptions thrown

ScalaReflectionException if isType is false.

def clone(): AnyRef

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

def ensuring(cond: (Universe.MethodSymbolApi) => Boolean, msg: => Any): Universe.MethodSymbolApi

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toEnsuring[Universe.MethodSymbolApi] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring

def ensuring(cond: (Universe.MethodSymbolApi) => Boolean): Universe.MethodSymbolApi

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toEnsuring[Universe.MethodSymbolApi] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring

def ensuring(cond: Boolean, msg: => Any): Universe.MethodSymbolApi

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toEnsuring[Universe.MethodSymbolApi] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring

def ensuring(cond: Boolean): Universe.MethodSymbolApi

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toEnsuring[Universe.MethodSymbolApi] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring

final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef

def equals(arg0: AnyRef): Boolean

Definition Classes
AnyRef → Any

def finalize(): Unit

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

def formatted(fmtstr: String): String

Implicit
This member is added by an implicit conversion from Universe.MethodSymbolApi toStringFormat[Universe.MethodSymbolApi] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()

final def getClass(): Class[_ <: AnyRef]

Definition Classes
AnyRef → Any
Annotations
@native()

def hashCode(): Int

Definition Classes
AnyRef → Any
Annotations
@native()

def isClass: Boolean

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

Definition Classes
SymbolApi

final def isInstanceOf[T0]: Boolean

Definition Classes
Any

final def isMethod: Boolean

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

Definition Classes
MethodSymbolApiSymbolApi

def isModule: Boolean

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.

Definition Classes
SymbolApi

def isModuleClass: Boolean

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.

Definition Classes
SymbolApi

def isOverloadedMethod: Boolean

Used to provide a better error message for asMethod

Attributes
protected
Definition Classes
TermSymbolApiSymbolApi

final def isTerm: Boolean

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.

Definition Classes
TermSymbolApiSymbolApi

def isType: Boolean

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.

Definition Classes
SymbolApi

final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef

final def notify(): Unit

Definition Classes
AnyRef
Annotations
@native()

final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@native()

final def synchronized[T0](arg0: => T0): T0

Definition Classes
AnyRef

def toString(): String

Definition Classes
AnyRef → Any

final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

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

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException]) @native()

© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.13.0/scala-reflect/scala/reflect/api/Symbols$MethodSymbolApi.html