Scala Reflection Library2.13.17 < Back
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# Packages

-  package root
  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package reflect
  Definition Classes
    scala
-  package macros

  EXPERIMENTAL

  EXPERIMENTAL

  The base package for Scala macros.

  Macros are functions that are called by the compiler during compilation. Within these functions the programmer has access to compiler APIs. For example, it is possible to generate, analyze and typecheck code.

  See the Macros Guide on how to get started with Scala macros.

  Definition Classes
    reflect
-  abstract class Universe extends api.Universe

  EXPERIMENTAL

  EXPERIMENTAL

  The refinement of scala.reflect.api.Universe for the use by macro writers.

  This universe provides mutability for reflection artifacts (e.g. macros can change types of compiler trees, add annotation to symbols representing definitions, etc) and exposes some internal compiler functionality such as `Symbol.deSkolemize` or `Tree.attachments`.

  Definition Classes
    macros
- Alternative
- AlternativeApi
- AlternativeExtractor
- Annotated
- AnnotatedApi
- AnnotatedExtractor
- AnnotatedType
- AnnotatedTypeApi
- AnnotatedTypeExtractor
- Annotation
- AnnotationApi
- AnnotationExtractor
- AppliedTypeTree
- AppliedTypeTreeApi
- AppliedTypeTreeExtractor
- Apply
- ApplyApi
- ApplyExtractor
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- ExistentialTypeExtractor
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- ExistentialTypeTreeApi
- ExistentialTypeTreeExtractor
- Expr
- FieldMirror
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- FreeTermSymbol
- FreeTermSymbolApi
- FreeTypeSymbol
- FreeTypeSymbolApi
- Function
- FunctionApi
- FunctionExtractor
- GenericApply
- GenericApplyApi
- Ident
- IdentApi
- IdentExtractor
- If
- IfApi
- IfExtractor
- ImplDef
- ImplDefApi
- Import
- ImportApi
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- ImportSelectorApi
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- Match
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- ModuleDefExtractor
- ModuleMirror
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- Name
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- NameTree
- NameTreeApi
- NamedArg
- NamedArgApi
- NamedArgExtractor
- NamesApi
- New
- NewApi
- NewExtractor
- NullaryMethodType
- NullaryMethodTypeApi
- NullaryMethodTypeExtractor
- PackageDef
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- PackageDefExtractor
- PolyType
- PolyTypeApi
- PolyTypeExtractor
- Position
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- SelectExtractor
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- StarApi
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- SymTree
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- Symbol
- SymbolApi
- Template
- TemplateApi
- TemplateExtractor
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- TermName
- TermNameApi
- TermNameExtractor
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- TermSymbol
- TermSymbolApi
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- This
- ThisApi
- ThisExtractor
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- ThisTypeApi
- ThisTypeExtractor
- Throw
- ThrowApi
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- Transformer
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- TreeGen
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- Type
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- Unliftable
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- ValDefExtractor
- ValOrDefDef
- ValOrDefDefApi
- WeakTypeTag

t

scala.reflect.macros.Universe

# TreeGen

###

#### trait TreeGen extends AnyRef

Source
  Universe.scala

Linear Supertypes
AnyRef, Any
Type Hierarchy

Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. TreeGen
2. AnyRef
3. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. Protected

### Abstract Value Members

1.  abstract def mkAttributedIdent(sym: Universe.Symbol): Universe.RefTree

   Builds a typed Ident with an underlying symbol.

2.  abstract def mkAttributedQualifier(tpe: Universe.Type, termSym: Universe.Symbol): Universe.Tree

   Builds a reference to value whose type is given stable prefix.

   Builds a reference to value whose type is given stable prefix. If the type is unsuitable, e.g. it is a TypeRef for an abstract type variable, then an Ident will be made using termSym as the Ident's symbol. In that case, termSym must not be NoSymbol.

3.  abstract def mkAttributedQualifier(tpe: Universe.Type): Universe.Tree

   Builds a reference to value whose type is given stable prefix.

   Builds a reference to value whose type is given stable prefix. The type must be suitable for this. For example, it must not be a TypeRef pointing to an abstract type variable.

4.  abstract def mkAttributedRef(sym: Universe.Symbol): Universe.RefTree

   Builds a typed reference to given symbol.

5.  abstract def mkAttributedRef(pre: Universe.Type, sym: Universe.Symbol): Universe.RefTree

   Builds a typed reference to given symbol with given stable prefix.

6.  abstract def mkAttributedSelect(qual: Universe.Tree, sym: Universe.Symbol): Universe.RefTree

   Builds a typed Select with an underlying symbol.

7.  abstract def mkAttributedStableRef(sym: Universe.Symbol): Universe.Tree
8.  abstract def mkAttributedStableRef(pre: Universe.Type, sym: Universe.Symbol): Universe.Tree
9.  abstract def mkAttributedThis(sym: Universe.Symbol): Universe.This

   Builds a typed This reference to given symbol.

10.  abstract def mkCast(tree: Universe.Tree, pt: Universe.Type): Universe.Tree
11.  abstract def mkMethodCall(target: Universe.Tree, targs: List[Universe.Type], args: List[Universe.Tree]): Universe.Tree
12.  abstract def mkMethodCall(receiver: Universe.Tree, method: Universe.Symbol, targs: List[Universe.Type], args: List[Universe.Tree]): Universe.Tree
13.  abstract def mkMethodCall(receiver: Universe.Symbol, methodName: Universe.Name, args: List[Universe.Tree]): Universe.Tree
14.  abstract def mkMethodCall(target: Universe.Tree, args: List[Universe.Tree]): Universe.Tree
15.  abstract def mkMethodCall(method: Universe.Symbol, args: List[Universe.Tree]): Universe.Tree
16.  abstract def mkMethodCall(method: Universe.Symbol, targs: List[Universe.Type], args: List[Universe.Tree]): Universe.Tree
17.  abstract def mkMethodCall(receiver: Universe.Symbol, methodName: Universe.Name, targs: List[Universe.Type], args: List[Universe.Tree]): Universe.Tree

    A creator for method calls, e.g.

    A creator for method calls, e.g. fn[T1, T2, ...](v1, v2, ...) There are a number of variations.

    receiver

      symbol of the method receiver

    methodName

      name of the method to call

    targs

      type arguments (if Nil, no TypeApply node will be generated)

    args

      value arguments

    returns

      the newly created trees.

18.  abstract def mkNullaryCall(method: Universe.Symbol, targs: List[Universe.Type]): Universe.Tree
19.  abstract def mkRuntimeUniverseRef: Universe.Tree

    A tree that refers to the runtime reflexive universe, `scala.reflect.runtime.universe`.

20.  abstract def mkUnattributedRef(fullName: Universe.Name): Universe.RefTree

    Builds an untyped reference to symbol with given name.

    Builds an untyped reference to symbol with given name. Requires the symbol to be static.

21.  abstract def mkUnattributedRef(sym: Universe.Symbol): Universe.RefTree

    Builds an untyped reference to given symbol.

    Builds an untyped reference to given symbol. Requires the symbol to be static.

22.  abstract def mkZero(tp: Universe.Type): Universe.Tree
23.  abstract def stabilize(tree: Universe.Tree): Universe.Tree

### Concrete Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##: Int
   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from TreeGen toany2stringadd[TreeGen] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (TreeGen, B)
   Implicit
     This member is added by an implicit conversion from TreeGen toArrowAssoc[TreeGen] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
7.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws(classOf[java.lang.CloneNotSupportedException]) @native()
8.  def ensuring(cond: (TreeGen) => Boolean, msg: => Any): TreeGen
   Implicit
     This member is added by an implicit conversion from TreeGen toEnsuring[TreeGen] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
9.  def ensuring(cond: (TreeGen) => Boolean): TreeGen
   Implicit
     This member is added by an implicit conversion from TreeGen toEnsuring[TreeGen] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
10.  def ensuring(cond: Boolean, msg: => Any): TreeGen
    Implicit
      This member is added by an implicit conversion from TreeGen toEnsuring[TreeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: Boolean): TreeGen
    Implicit
      This member is added by an implicit conversion from TreeGen toEnsuring[TreeGen] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
13.  def equals(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef → Any
14.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
15.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
16.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
17.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
18.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
19.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
20.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
21.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
22.  def toString(): String
    Definition Classes
      AnyRef → Any
23.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
24.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
25.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from TreeGen toStringFormat[TreeGen] performed by method StringFormat in scala.Predef.
   Definition Classes
     StringFormat
   Annotations
     @deprecated @inline()
   Deprecated

     (Since version 2.12.16) Use `formatString.format(value)` instead of `value.formatted(formatString)`, or use the `f""` string interpolator. In Java 15 and later, `formatted` resolves to the new method in String which has reversed parameters.

2.  def →[B](y: B): (TreeGen, B)
   Implicit
     This member is added by an implicit conversion from TreeGen toArrowAssoc[TreeGen] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `->` instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd fromTreeGen to any2stringadd[TreeGen]

### Inherited by implicit conversion StringFormat fromTreeGen to StringFormat[TreeGen]

### Inherited by implicit conversion Ensuring fromTreeGen to Ensuring[TreeGen]

### Inherited by implicit conversion ArrowAssoc fromTreeGen to ArrowAssoc[TreeGen]

### Ungrouped