Packages

trait Trees extends AnyRef

EXPERIMENTAL

This trait defines the node types used in Scala abstract syntax trees (AST) and operations on them.

Trees are the basis for Scala's abstract syntax that is used to represent programs. They are also called abstract syntax trees and commonly abbreviated as ASTs.

In Scala reflection, APIs that produce or use Trees are:

  • Annotations which use trees to represent their arguments, exposed in Annotation.scalaArgs.
  • reify, a special method on scala.reflect.api.Universe that takes an expression and returns an AST which represents the expression.
  • Macros and runtime compilation with toolboxes which both use trees as their program representation medium.

Trees are immutable, except for three fields pos, symbol, and tpe, which are assigned when a tree is typechecked to attribute it with the information gathered by the typechecker.

Examples

The following creates an AST representing a literal 5 in Scala source code:

Literal(Constant(5))

The following creates an AST representing print("Hello World"):

Apply(Select(Select(This(TypeName("scala")), TermName("Predef")), TermName("print")), List(Literal(Constant("Hello World"))))

The following creates an AST from a literal 5, and then uses showRaw to print it in a readable format.

import scala.reflect.runtime.universe.{ reify, showRaw }
print( showRaw( reify{5}.tree ) )` // prints Literal(Constant(5))

For more information about Trees, see the Reflection Guide: Symbols, Trees, Types.

Self Type
Universe
Source
Trees.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
JavaUniverse, Universe, Universe
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Type Members

  1. abstract type Alternative >: Null <: Universe.AlternativeApi with Universe.TermTree

    Alternatives of patterns.

    Alternatives of patterns.

    Eliminated by compiler phases Eliminated by compiler phases patmat (in the new pattern matcher of 2.10) or explicitouter (in the old pre-2.10 pattern matcher), except for occurrences in encoded Switch stmt (i.e. remaining Match(CaseDef(...)))

  2. trait AlternativeApi extends Universe.TermTreeApi

    The API that all alternatives support

  3. abstract class AlternativeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Alternative(trees).

    An extractor class to create and pattern match with syntax Alternative(trees). This AST node corresponds to the following Scala code:

    pat1 | ... | patn

  4. abstract type Annotated >: Null <: Universe.AnnotatedApi with Universe.Tree

    A tree that has an annotation attached to it.

    A tree that has an annotation attached to it. Only used for annotated types and annotation ascriptions, annotations on definitions are stored in the Modifiers. Eliminated by typechecker (typedAnnotated), the annotations are then stored in an AnnotatedType.

  5. trait AnnotatedApi extends Universe.TreeApi

    The API that all annotateds support

  6. abstract class AnnotatedExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Annotated(annot, arg).

    An extractor class to create and pattern match with syntax Annotated(annot, arg). This AST node corresponds to the following Scala code:

    arg @annot // for types arg: @annot // for exprs

  7. abstract type AppliedTypeTree >: Null <: Universe.AppliedTypeTreeApi with Universe.TypTree

    Applied type <tpt> [ <args> ], eliminated by RefCheck

  8. trait AppliedTypeTreeApi extends Universe.TypTreeApi

    The API that all applied type trees support

  9. abstract class AppliedTypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax AppliedTypeTree(tpt, args).

    An extractor class to create and pattern match with syntax AppliedTypeTree(tpt, args). This AST node corresponds to the following Scala code:

    tpt[args]

    Should only be used with tpt nodes which are types, i.e. which have isType returning true. Otherwise TypeApply should be used instead.

    List[Int] as in val x: List[Int] = ??? // represented as AppliedTypeTree(Ident(<List>), List(TypeTree(<Int>)))

    def foo[T] = ??? foo[Int] // represented as TypeApply(Ident(<foo>), List(TypeTree(<Int>)))

  10. abstract type Apply >: Null <: Universe.ApplyApi with Universe.GenericApply

    Value application

  11. trait ApplyApi extends Universe.GenericApplyApi

    The API that all applies support

  12. abstract class ApplyExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Apply(fun, args).

    An extractor class to create and pattern match with syntax Apply(fun, args). This AST node corresponds to the following Scala code:

    fun(args)

    For instance:

    fun[targs](args)

    Is expressed as:

    Apply(TypeApply(fun, targs), args)

  13. abstract type Assign >: Null <: Universe.AssignApi with Universe.TermTree

    Assignment

  14. trait AssignApi extends Universe.TermTreeApi

    The API that all assigns support

  15. abstract class AssignExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Assign(lhs, rhs).

    An extractor class to create and pattern match with syntax Assign(lhs, rhs). This AST node corresponds to the following Scala code:

    lhs = rhs

  16. abstract type AssignOrNamedArg >: Null <: Universe.AssignOrNamedArgApi with Universe.TermTree

    Either an assignment or a named argument.

    Either an assignment or a named argument. Only appears in argument lists, eliminated by compiler phase typecheck (doTypedApply), resurrected by reifier.

  17. trait AssignOrNamedArgApi extends Universe.TermTreeApi

    The API that all assigns support

  18. abstract class AssignOrNamedArgExtractor extends AnyRef

    An extractor class to create and pattern match with syntax AssignOrNamedArg(lhs, rhs).

    An extractor class to create and pattern match with syntax AssignOrNamedArg(lhs, rhs). This AST node corresponds to the following Scala code:

    m.f(lhs = rhs)
    @annotation(lhs = rhs)
  19. abstract type Bind >: Null <: Universe.BindApi with Universe.DefTree

    Bind a variable to a rhs pattern.

    Bind a variable to a rhs pattern.

    Eliminated by compiler phases patmat (in the new pattern matcher of 2.10) or explicitouter (in the old pre-2.10 pattern matcher).

  20. trait BindApi extends Universe.DefTreeApi

    The API that all binds support

  21. abstract class BindExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Bind(name, body).

    An extractor class to create and pattern match with syntax Bind(name, body). This AST node corresponds to the following Scala code:

    pat*

  22. abstract type Block >: Null <: Universe.BlockApi with Universe.TermTree

    Block of expressions (semicolon separated expressions)

  23. trait BlockApi extends Universe.TermTreeApi

    The API that all blocks support

  24. abstract class BlockExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Block(stats, expr).

    An extractor class to create and pattern match with syntax Block(stats, expr). This AST node corresponds to the following Scala code:

    { stats; expr }

    If the block is empty, the expr is set to Literal(Constant(())).

  25. abstract type CaseDef >: Null <: Universe.CaseDefApi with Universe.Tree

    Case clause in a pattern match.

    Case clause in a pattern match. (except for occurrences in switch statements). Eliminated by compiler phases patmat (in the new pattern matcher of 2.10) or explicitouter (in the old pre-2.10 pattern matcher)

  26. trait CaseDefApi extends Universe.TreeApi

    The API that all case defs support

  27. abstract class CaseDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax CaseDef(pat, guard, body).

    An extractor class to create and pattern match with syntax CaseDef(pat, guard, body). This AST node corresponds to the following Scala code:

    case pat if guard => body

    If the guard is not present, the guard is set to EmptyTree. If the body is not specified, the body is set to Literal(Constant(()))

  28. abstract type ClassDef >: Null <: Universe.ClassDefApi with Universe.ImplDef

    A class definition.

  29. trait ClassDefApi extends Universe.ImplDefApi

    The API that all class defs support

  30. abstract class ClassDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax ClassDef(mods, name, tparams, impl).

    An extractor class to create and pattern match with syntax ClassDef(mods, name, tparams, impl). This AST node corresponds to the following Scala code:

    mods class name [tparams] impl

    Where impl stands for:

    extends parents { defs }

  31. abstract type CompoundTypeTree >: Null <: Universe.CompoundTypeTreeApi with Universe.TypTree

    Intersection type <parent1> with ...

    Intersection type <parent1> with ... with <parentN> { <decls> }, eliminated by RefCheck

  32. trait CompoundTypeTreeApi extends Universe.TypTreeApi

    The API that all compound type trees support

  33. abstract class CompoundTypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax CompoundTypeTree(templ).

    An extractor class to create and pattern match with syntax CompoundTypeTree(templ). This AST node corresponds to the following Scala code:

    parent1 with ... with parentN { refinement }

  34. abstract type DefDef >: Null <: Universe.DefDefApi with Universe.ValOrDefDef

    A method or macro definition.

  35. trait DefDefApi extends Universe.ValOrDefDefApi

    The API that all def defs support

  36. abstract class DefDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax DefDef(mods, name, tparams, vparamss, tpt, rhs).

    An extractor class to create and pattern match with syntax DefDef(mods, name, tparams, vparamss, tpt, rhs). This AST node corresponds to the following Scala code:

    mods def name[tparams](vparams_1)...(vparams_n): tpt = rhs

    If the return type is not specified explicitly (i.e. is meant to be inferred), this is expressed by having tpt set to TypeTree() (but not to an EmptyTree!).

  37. abstract type DefTree >: Null <: Universe.DefTreeApi with Universe.SymTree with Universe.NameTree

    A tree representing a symbol-defining entity: 1) A declaration or a definition (type, class, object, package, val, var, or def) 2) Bind that is used to represent binding occurrences in pattern matches 3) LabelDef that is used internally to represent while loops

  38. trait DefTreeApi extends Universe.SymTreeApi with Universe.NameTreeApi

    The API that all def trees support

  39. abstract type ExistentialTypeTree >: Null <: Universe.ExistentialTypeTreeApi with Universe.TypTree

    Existential type tree node

  40. trait ExistentialTypeTreeApi extends Universe.TypTreeApi

    The API that all existential type trees support

  41. abstract class ExistentialTypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax ExistentialTypeTree(tpt, whereClauses).

    An extractor class to create and pattern match with syntax ExistentialTypeTree(tpt, whereClauses). This AST node corresponds to the following Scala code:

    tpt forSome { whereClauses }

  42. abstract type Function >: Null <: Universe.FunctionApi with Universe.TermTree with Universe.SymTree

    Anonymous function, eliminated by compiler phase lambdalift

  43. trait FunctionApi extends Universe.TermTreeApi with Universe.SymTreeApi

    The API that all functions support

  44. abstract class FunctionExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Function(vparams, body).

    An extractor class to create and pattern match with syntax Function(vparams, body). This AST node corresponds to the following Scala code:

    vparams => body

    The symbol of a Function is a synthetic TermSymbol. It is the owner of the function's parameters.

  45. abstract type GenericApply >: Null <: Universe.GenericApplyApi with Universe.TermTree

    Common base class for Apply and TypeApply.

  46. trait GenericApplyApi extends Universe.TermTreeApi

    The API that all applies support

  47. abstract type Ident >: Null <: Universe.IdentApi with Universe.RefTree

    A reference to identifier name.

  48. trait IdentApi extends Universe.RefTreeApi

    The API that all idents support

  49. abstract class IdentExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Ident(qual, name).

    An extractor class to create and pattern match with syntax Ident(qual, name). This AST node corresponds to the following Scala code:

    name

    Type checker converts idents that refer to enclosing fields or methods to selects. For example, name ==> this.name

  50. abstract type If >: Null <: Universe.IfApi with Universe.TermTree

    Conditional expression

  51. trait IfApi extends Universe.TermTreeApi

    The API that all ifs support

  52. abstract class IfExtractor extends AnyRef

    An extractor class to create and pattern match with syntax If(cond, thenp, elsep).

    An extractor class to create and pattern match with syntax If(cond, thenp, elsep). This AST node corresponds to the following Scala code:

    if (cond) thenp else elsep

    If the alternative is not present, the elsep is set to Literal(Constant(())).

  53. abstract type ImplDef >: Null <: Universe.ImplDefApi with Universe.MemberDef

    A common base class for class and object definitions.

  54. trait ImplDefApi extends Universe.MemberDefApi

    The API that all impl defs support

  55. abstract type Import >: Null <: Universe.ImportApi with Universe.SymTree

    Import clause

  56. trait ImportApi extends Universe.SymTreeApi

    The API that all imports support

  57. abstract class ImportExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Import(expr, selectors).

    An extractor class to create and pattern match with syntax Import(expr, selectors). This AST node corresponds to the following Scala code:

    import expr.{selectors}

    Selectors are a list of ImportSelectors, which conceptually are pairs of names (from, to). The last (and maybe only name) may be a nme.WILDCARD. For instance:

    import qual.{x, y => z, _}

    Would be represented as:

    Import(qual, List(("x", "x"), ("y", "z"), (WILDCARD, null)))

    The symbol of an Import is an import symbol @see Symbol.newImport. It's used primarily as a marker to check that the import has been typechecked.

  58. abstract type ImportSelector >: Null <: Universe.ImportSelectorApi

    Import selector (not a tree, but a component of the Import tree)

    Import selector (not a tree, but a component of the Import tree)

    Representation of an imported name its optional rename and their optional positions

    Eliminated by typecheck.

  59. trait ImportSelectorApi extends AnyRef

    The API that all import selectors support

  60. abstract class ImportSelectorExtractor extends AnyRef

    An extractor class to create and pattern match with syntax ImportSelector(name:, namePos, rename, renamePos).

    An extractor class to create and pattern match with syntax ImportSelector(name:, namePos, rename, renamePos). This is not an AST node, it is used as a part of the Import node.

  61. abstract type LabelDef >: Null <: Universe.LabelDefApi with Universe.DefTree with Universe.TermTree

    A labelled expression.

    A labelled expression. Not expressible in language syntax, but generated by the compiler to simulate while/do-while loops, and also by the pattern matcher.

    The label acts much like a nested function, where params represents the incoming parameters. The symbol given to the LabelDef should have a MethodType, as if it were a nested function.

    Jumps are apply nodes attributed with a label's symbol. The arguments from the apply node will be passed to the label and assigned to the Idents.

    Forward jumps within a block are allowed.

  62. trait LabelDefApi extends Universe.DefTreeApi with Universe.TermTreeApi

    The API that all label defs support

  63. abstract class LabelDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax LabelDef(name, params, rhs).

    An extractor class to create and pattern match with syntax LabelDef(name, params, rhs).

    This AST node does not have direct correspondence to Scala code. It is used for tailcalls and like. For example, while/do are desugared to label defs as follows:

    while (cond) body ==> LabelDef($L, List(), if (cond) { body; L$() } else ())
    do body while (cond) ==> LabelDef($L, List(), body; if (cond) L$() else ())
  64. abstract type Literal >: Null <: Universe.LiteralApi with Universe.TermTree

    Literal

  65. trait LiteralApi extends Universe.TermTreeApi

    The API that all literals support

  66. abstract class LiteralExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Literal(value).

    An extractor class to create and pattern match with syntax Literal(value). This AST node corresponds to the following Scala code:

    value

  67. abstract type Match >: Null <: Universe.MatchApi with Universe.TermTree

    - Pattern matching expression (before compiler phase explicitouter before 2.10 / patmat from 2.10)

    - Pattern matching expression (before compiler phase explicitouter before 2.10 / patmat from 2.10)

    • Switch statements (after compiler phase explicitouter before 2.10 / patmat from 2.10)

    After compiler phase explicitouter before 2.10 / patmat from 2.10, cases will satisfy the following constraints:

    • all guards are EmptyTree,
    • all patterns will be either Literal(Constant(x:Int)) or Alternative(lit|...|lit)
    • except for an "otherwise" branch, which has pattern Ident(nme.WILDCARD)
  68. trait MatchApi extends Universe.TermTreeApi

    The API that all matches support

  69. abstract class MatchExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Match(selector, cases).

    An extractor class to create and pattern match with syntax Match(selector, cases). This AST node corresponds to the following Scala code:

    selector match { cases }

    Match is also used in pattern matching assignments like val (foo, bar) = baz.

  70. abstract type MemberDef >: Null <: Universe.MemberDefApi with Universe.DefTree

    Common base class for all member definitions: types, classes, objects, packages, vals and vars, defs.

  71. trait MemberDefApi extends Universe.DefTreeApi

    The API that all member defs support

  72. abstract type Modifiers >: Null <: Universe.ModifiersApi

    The type of tree modifiers (not a tree, but rather part of DefTrees).

  73. abstract class ModifiersApi extends AnyRef

    The API that all Modifiers support

  74. abstract class ModifiersExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Modifiers(flags, privateWithin, annotations).

    An extractor class to create and pattern match with syntax Modifiers(flags, privateWithin, annotations). Modifiers encapsulate flags, visibility annotations and Scala annotations for member definitions.

  75. abstract type ModuleDef >: Null <: Universe.ModuleDefApi with Universe.ImplDef

    An object definition, e.g.

    An object definition, e.g. object Foo. Internally, objects are quite frequently called modules to reduce ambiguity. Eliminated by compiler phase refcheck.

  76. trait ModuleDefApi extends Universe.ImplDefApi

    The API that all module defs support

  77. abstract class ModuleDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax ModuleDef(mods, name, impl).

    An extractor class to create and pattern match with syntax ModuleDef(mods, name, impl). This AST node corresponds to the following Scala code:

    mods object name impl

    Where impl stands for:

    extends parents { defs }

  78. abstract type NameTree >: Null <: Universe.NameTreeApi with Universe.Tree

    A tree that carries a name, e.g.

    A tree that carries a name, e.g. by defining it (DefTree) or by referring to it (RefTree).

  79. trait NameTreeApi extends Universe.TreeApi

    The API that all name trees support

  80. abstract type New >: Null <: Universe.NewApi with Universe.TermTree

    Object instantiation

  81. trait NewApi extends Universe.TermTreeApi

    The API that all news support

  82. abstract class NewExtractor extends AnyRef

    An extractor class to create and pattern match with syntax New(tpt).

    An extractor class to create and pattern match with syntax New(tpt). This AST node corresponds to the following Scala code:

    new T

    This node always occurs in the following context:

    (new tpt).<init>[targs](args)

    For example, an AST representation of:

    new Example[Int](2)(3)

    is the following code:

    Apply( Apply( TypeApply( Select(New(TypeTree(typeOf[Example])), nme.CONSTRUCTOR) TypeTree(typeOf[Int])), List(Literal(Constant(2)))), List(Literal(Constant(3))))

  83. abstract type PackageDef >: Null <: Universe.PackageDefApi with Universe.MemberDef

    A packaging, such as package pid { stats }

  84. trait PackageDefApi extends Universe.MemberDefApi

    The API that all package defs support

  85. abstract class PackageDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax PackageDef(pid, stats).

    An extractor class to create and pattern match with syntax PackageDef(pid, stats). This AST node corresponds to the following Scala code:

    package pid { stats }

  86. abstract type RefTree >: Null <: Universe.RefTreeApi with Universe.SymTree with Universe.NameTree

    A tree which references a symbol-carrying entity.

    A tree which references a symbol-carrying entity. References one, as opposed to defining one; definitions are in DefTrees.

  87. trait RefTreeApi extends Universe.SymTreeApi with Universe.NameTreeApi

    The API that all ref trees support

  88. abstract class RefTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax RefTree(qual, name).

    An extractor class to create and pattern match with syntax RefTree(qual, name). This AST node corresponds to either Ident, Select or SelectFromTypeTree.

  89. abstract type Return >: Null <: Universe.ReturnApi with Universe.SymTree with Universe.TermTree

    Return expression

  90. trait ReturnApi extends Universe.TermTreeApi

    The API that all returns support

  91. abstract class ReturnExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Return(expr).

    An extractor class to create and pattern match with syntax Return(expr). This AST node corresponds to the following Scala code:

    return expr

    The symbol of a Return node is the enclosing method.

  92. abstract type Select >: Null <: Universe.SelectApi with Universe.RefTree

    A member selection <qualifier> .

    A member selection <qualifier> . <name>

  93. trait SelectApi extends Universe.RefTreeApi

    The API that all selects support

  94. abstract class SelectExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Select(qual, name).

    An extractor class to create and pattern match with syntax Select(qual, name). This AST node corresponds to the following Scala code:

    qualifier.selector

    Should only be used with qualifier nodes which are terms, i.e. which have isTerm returning true. Otherwise SelectFromTypeTree should be used instead.

    foo.Bar // represented as Select(Ident(<foo>), <Bar>) Foo#Bar // represented as SelectFromTypeTree(Ident(<Foo>), <Bar>)

  95. abstract type SelectFromTypeTree >: Null <: Universe.SelectFromTypeTreeApi with Universe.TypTree with Universe.RefTree

    Type selection <qualifier> # <name>, eliminated by RefCheck

  96. trait SelectFromTypeTreeApi extends Universe.TypTreeApi with Universe.RefTreeApi

    The API that all selects from type trees support

  97. abstract class SelectFromTypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax SelectFromTypeTree(qualifier, name).

    An extractor class to create and pattern match with syntax SelectFromTypeTree(qualifier, name). This AST node corresponds to the following Scala code:

    qualifier # selector

    Note: a path-dependent type p.T is expressed as p.type # T

    Should only be used with qualifier nodes which are types, i.e. which have isType returning true. Otherwise Select should be used instead.

    Foo#Bar // represented as SelectFromTypeTree(Ident(<Foo>), <Bar>) foo.Bar // represented as Select(Ident(<foo>), <Bar>)

  98. abstract type SingletonTypeTree >: Null <: Universe.SingletonTypeTreeApi with Universe.TypTree

    Singleton type, eliminated by RefCheck

  99. trait SingletonTypeTreeApi extends Universe.TypTreeApi

    The API that all singleton type trees support

  100. abstract class SingletonTypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax SingletonTypeTree(ref).

    An extractor class to create and pattern match with syntax SingletonTypeTree(ref). This AST node corresponds to the following Scala code:

    ref.type

  101. abstract type Star >: Null <: Universe.StarApi with Universe.TermTree

    Repetition of pattern.

    Repetition of pattern.

    Eliminated by compiler phases patmat (in the new pattern matcher of 2.10) or explicitouter (in the old pre-2.10 pattern matcher).

  102. trait StarApi extends Universe.TermTreeApi

    The API that all stars support

  103. abstract class StarExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Star(elem).

    An extractor class to create and pattern match with syntax Star(elem). This AST node corresponds to the following Scala code:

    pat*

  104. abstract type Super >: Null <: Universe.SuperApi with Universe.TermTree

    Super reference, where qual is the corresponding this reference.

    Super reference, where qual is the corresponding this reference. A super reference C.super[M] is represented as Super(This(C), M).

  105. trait SuperApi extends Universe.TermTreeApi

    The API that all supers support

  106. abstract class SuperExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Super(qual, mix).

    An extractor class to create and pattern match with syntax Super(qual, mix). This AST node corresponds to the following Scala code:

    C.super[M]

    Which is represented as:

    Super(This(C), M)

    If mix is empty, it is tpnme.EMPTY.

    The symbol of a Super is the class _from_ which the super reference is made. For instance in C.super(...), it would be C.

  107. abstract type SymTree >: Null <: Universe.SymTreeApi with Universe.Tree

    A tree that carries a symbol, e.g.

    A tree that carries a symbol, e.g. by defining it (DefTree) or by referring to it (RefTree). Such trees start their life naked, returning NoSymbol, but after being typechecked without errors they hold non-empty symbols.

  108. trait SymTreeApi extends Universe.TreeApi

    The API that all sym trees support

  109. abstract type Template >: Null <: Universe.TemplateApi with Universe.SymTree

    Instantiation template of a class or trait

  110. trait TemplateApi extends Universe.SymTreeApi

    The API that all templates support

  111. abstract class TemplateExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Template(parents, self, body).

    An extractor class to create and pattern match with syntax Template(parents, self, body). This AST node corresponds to the following Scala code:

    extends parents { self => body }

    In case when the self-type annotation is missing, it is represented as an empty value definition with nme.WILDCARD as name and NoType as type.

    The symbol of a template is a local dummy. @see Symbol.newLocalDummy The owner of the local dummy is the enclosing trait or class. The local dummy is itself the owner of any local blocks. For example:

    class C { def foo { // owner is C def bar // owner is local dummy } }

  112. abstract type TermTree >: Null <: Universe.TermTreeApi with Universe.Tree

    A tree for a term.

    A tree for a term. Not all trees representing terms are TermTrees; use isTerm to reliably identify terms.

  113. trait TermTreeApi extends Universe.TreeApi

    The API that all term trees support

  114. abstract type This >: Null <: Universe.ThisApi with Universe.TermTree with Universe.SymTree

    Self reference

  115. trait ThisApi extends Universe.TermTreeApi with Universe.SymTreeApi

    The API that all thises support

  116. abstract class ThisExtractor extends AnyRef

    An extractor class to create and pattern match with syntax This(qual).

    An extractor class to create and pattern match with syntax This(qual). This AST node corresponds to the following Scala code:

    qual.this

    The symbol of a This is the class to which the this refers. For instance in C.this, it would be C.

  117. abstract type Throw >: Null <: Universe.ThrowApi with Universe.TermTree

    Throw expression

  118. trait ThrowApi extends Universe.TermTreeApi

    The API that all tries support

  119. abstract class ThrowExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Throw(expr).

    An extractor class to create and pattern match with syntax Throw(expr). This AST node corresponds to the following Scala code:

    throw expr

  120. abstract class Transformer extends AnyRef

    A class that implement a default tree transformation strategy: breadth-first component-wise cloning.

  121. class Traverser extends AnyRef

    A class that implement a default tree traversal strategy: breadth-first component-wise.

  122. abstract type Tree >: Null <: Universe.TreeApi

    The type of Scala abstract syntax trees.

  123. trait TreeApi extends Product

    The API that all trees support.

    The API that all trees support. The main source of information about trees is the scala.reflect.api.Trees page.

  124. abstract type TreeCopier >: Null <: Universe.TreeCopierOps

    The type of standard (lazy) tree copiers.

  125. abstract class TreeCopierOps extends AnyRef

    The API of a tree copier.

  126. abstract type Try >: Null <: Universe.TryApi with Universe.TermTree

    Try catch node

  127. trait TryApi extends Universe.TermTreeApi

    The API that all tries support

  128. abstract class TryExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Try(block, catches, finalizer).

    An extractor class to create and pattern match with syntax Try(block, catches, finalizer). This AST node corresponds to the following Scala code:

    try block catch { catches } finally finalizer

    If the finalizer is not present, the finalizer is set to EmptyTree.

  129. abstract type TypTree >: Null <: Universe.TypTreeApi with Universe.Tree

    A tree for a type.

    A tree for a type. Not all trees representing types are TypTrees; use isType to reliably identify types.

  130. trait TypTreeApi extends Universe.TreeApi

    The API that all typ trees support

  131. abstract type TypeApply >: Null <: Universe.TypeApplyApi with Universe.GenericApply

    Explicit type application.

  132. trait TypeApplyApi extends Universe.GenericApplyApi

    The API that all type applies support

  133. abstract class TypeApplyExtractor extends AnyRef

    An extractor class to create and pattern match with syntax TypeApply(fun, args).

    An extractor class to create and pattern match with syntax TypeApply(fun, args). This AST node corresponds to the following Scala code:

    fun[args]

    Should only be used with fun nodes which are terms, i.e. which have isTerm returning true. Otherwise AppliedTypeTree should be used instead.

    def foo[T] = ??? foo[Int] // represented as TypeApply(Ident(<foo>), List(TypeTree(<Int>)))

    List[Int] as in val x: List[Int] = ??? // represented as AppliedTypeTree(Ident(<List>), List(TypeTree(<Int>)))

  134. abstract type TypeBoundsTree >: Null <: Universe.TypeBoundsTreeApi with Universe.TypTree

    Type bounds tree node

  135. trait TypeBoundsTreeApi extends Universe.TypTreeApi

    The API that all type bound trees support

  136. abstract class TypeBoundsTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax TypeBoundsTree(lo, hi).

    An extractor class to create and pattern match with syntax TypeBoundsTree(lo, hi). This AST node corresponds to the following Scala code:

    >: lo <: hi

  137. abstract type TypeDef >: Null <: Universe.TypeDefApi with Universe.MemberDef

    An abstract type, a type parameter, or a type alias.

    An abstract type, a type parameter, or a type alias. Eliminated by erasure.

  138. trait TypeDefApi extends Universe.MemberDefApi

    The API that all type defs support

  139. abstract class TypeDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax TypeDef(mods, name, tparams, rhs).

    An extractor class to create and pattern match with syntax TypeDef(mods, name, tparams, rhs). This AST node corresponds to the following Scala code:

    mods type name[tparams] = rhs

    mods type name[tparams] >: lo <: hi

    First usage illustrates TypeDefs representing type aliases and type parameters. Second usage illustrates TypeDefs representing abstract types, where lo and hi are both TypeBoundsTrees and Modifier.deferred is set in mods.

  140. abstract type TypeTree >: Null <: Universe.TypeTreeApi with Universe.TypTree

    A synthetic tree holding an arbitrary type.

    A synthetic tree holding an arbitrary type. Not to be confused with with TypTree, the trait for trees that are only used for type trees. TypeTree's are inserted in several places, but most notably in RefCheck, where the arbitrary type trees are all replaced by TypeTree's.

  141. trait TypeTreeApi extends Universe.TypTreeApi

    The API that all type trees support

  142. abstract class TypeTreeExtractor extends AnyRef

    An extractor class to create and pattern match with syntax TypeTree().

    An extractor class to create and pattern match with syntax TypeTree(). This AST node does not have direct correspondence to Scala code, and is emitted by everywhere when we want to wrap a Type in a Tree.

  143. abstract type Typed >: Null <: Universe.TypedApi with Universe.TermTree

    Type annotation, eliminated by compiler phase cleanup

  144. trait TypedApi extends Universe.TermTreeApi

    The API that all typeds support

  145. abstract class TypedExtractor extends AnyRef

    An extractor class to create and pattern match with syntax Typed(expr, tpt).

    An extractor class to create and pattern match with syntax Typed(expr, tpt). This AST node corresponds to the following Scala code:

    expr: tpt

  146. abstract type UnApply >: Null <: Universe.UnApplyApi with Universe.TermTree

    Used to represent unapply methods in pattern matching.

    Used to represent unapply methods in pattern matching.

    For example:

    2 match { case Foo(x) => x }

    Is represented as:

    Match(
  Literal(Constant(2)),
  List(
    CaseDef(
      UnApply(
        // a dummy node that carries the type of unapplication to patmat
        // the <unapply-selector> here doesn't have an underlying symbol
        // it only has a type assigned, therefore after `untypecheck` this tree is no longer typeable
        Apply(Select(Ident(Foo), TermName("unapply")), List(Ident(TermName("<unapply-selector>")))),
        // arguments of the unapply => nothing synthetic here
        List(Bind(TermName("x"), Ident(nme.WILDCARD)))),
      EmptyTree,
      Ident(TermName("x")))))

    Introduced by typer. Eliminated by compiler phases patmat (in the new pattern matcher of 2.10) or explicitouter (in the old pre-2.10 pattern matcher).

  147. trait UnApplyApi extends Universe.TermTreeApi

    The API that all unapplies support

  148. abstract class UnApplyExtractor extends AnyRef

    An extractor class to create and pattern match with syntax UnApply(fun, args).

    An extractor class to create and pattern match with syntax UnApply(fun, args). This AST node does not have direct correspondence to Scala code, and is introduced when typechecking pattern matches and try blocks.

  149. abstract type ValDef >: Null <: Universe.ValDefApi with Universe.ValOrDefDef

    Broadly speaking, a value definition.

    Broadly speaking, a value definition. All these are encoded as ValDefs:

    • immutable values, e.g. "val x"
    • mutable values, e.g. "var x" - the MUTABLE flag set in mods
    • lazy values, e.g. "lazy val x" - the LAZY flag set in mods
    • method parameters, see vparamss in scala.reflect.api.Trees#DefDef - the PARAM flag is set in mods
    • explicit self-types, e.g. class A { self: Bar => }
  150. trait ValDefApi extends Universe.ValOrDefDefApi

    The API that all val defs support

  151. abstract class ValDefExtractor extends AnyRef

    An extractor class to create and pattern match with syntax ValDef(mods, name, tpt, rhs).

    An extractor class to create and pattern match with syntax ValDef(mods, name, tpt, rhs). This AST node corresponds to any of the following Scala code:

    mods val name: tpt = rhs

    mods var name: tpt = rhs

    mods name: tpt = rhs // in signatures of function and method definitions

    self: Bar => // self-types

    If the type of a value is not specified explicitly (i.e. is meant to be inferred), this is expressed by having tpt set to TypeTree() (but not to an EmptyTree!).

  152. abstract type ValOrDefDef >: Null <: Universe.ValOrDefDefApi with Universe.MemberDef

    A common base class for ValDefs and DefDefs.

  153. trait ValOrDefDefApi extends Universe.MemberDefApi

    The API that all val defs and def defs support

  154. type ModifiersCreator = Universe.ModifiersExtractor
    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) use ModifiersExtractor instead

Abstract Value Members

  1. abstract val Alternative: Universe.AlternativeExtractor

    The constructor/extractor for Alternative instances.

  2. abstract val Annotated: Universe.AnnotatedExtractor

    The constructor/extractor for Annotated instances.

  3. abstract val AppliedTypeTree: Universe.AppliedTypeTreeExtractor

    The constructor/extractor for AppliedTypeTree instances.

  4. abstract val Apply: Universe.ApplyExtractor

    The constructor/extractor for Apply instances.

  5. abstract val Assign: Universe.AssignExtractor

    The constructor/extractor for Assign instances.

  6. abstract val AssignOrNamedArg: Universe.AssignOrNamedArgExtractor

    The constructor/extractor for AssignOrNamedArg instances.

  7. abstract val Bind: Universe.BindExtractor

    The constructor/extractor for Bind instances.

  8. abstract val Block: Universe.BlockExtractor

    The constructor/extractor for Block instances.

  9. abstract val CaseDef: Universe.CaseDefExtractor

    The constructor/extractor for CaseDef instances.

  10. abstract val ClassDef: Universe.ClassDefExtractor

    The constructor/extractor for ClassDef instances.

  11. abstract val CompoundTypeTree: Universe.CompoundTypeTreeExtractor

    The constructor/extractor for CompoundTypeTree instances.

  12. abstract val DefDef: Universe.DefDefExtractor

    The constructor/extractor for DefDef instances.

  13. abstract val EmptyTree: Universe.Tree

    The empty tree

  14. abstract val ExistentialTypeTree: Universe.ExistentialTypeTreeExtractor

    The constructor/extractor for ExistentialTypeTree instances.

  15. abstract val Function: Universe.FunctionExtractor

    The constructor/extractor for Function instances.

  16. abstract def Ident(sym: Universe.Symbol): Universe.Ident

    A factory method for Ident nodes.

  17. abstract val Ident: Universe.IdentExtractor

    The constructor/extractor for Ident instances.

  18. abstract val If: Universe.IfExtractor

    The constructor/extractor for If instances.

  19. abstract val Import: Universe.ImportExtractor

    The constructor/extractor for Import instances.

  20. abstract val ImportSelector: Universe.ImportSelectorExtractor

    The constructor/extractor for ImportSelector instances.

  21. abstract val LabelDef: Universe.LabelDefExtractor

    The constructor/extractor for LabelDef instances.

  22. abstract val Literal: Universe.LiteralExtractor

    The constructor/extractor for Literal instances.

  23. abstract val Match: Universe.MatchExtractor

    The constructor/extractor for Match instances.

  24. abstract val Modifiers: Universe.ModifiersExtractor

    The constructor/extractor for Modifiers instances.

  25. abstract val ModuleDef: Universe.ModuleDefExtractor

    The constructor/extractor for ModuleDef instances.

  26. abstract val New: Universe.NewExtractor

    The constructor/extractor for New instances.

  27. abstract val PackageDef: Universe.PackageDefExtractor

    The constructor/extractor for PackageDef instances.

  28. abstract val RefTree: Universe.RefTreeExtractor

    The constructor/extractor for RefTree instances.

  29. abstract val Return: Universe.ReturnExtractor

    The constructor/extractor for Return instances.

  30. abstract def Select(qualifier: Universe.Tree, sym: Universe.Symbol): Universe.Select

    A factory method for Select nodes.

  31. abstract val Select: Universe.SelectExtractor

    The constructor/extractor for Select instances.

  32. abstract val SelectFromTypeTree: Universe.SelectFromTypeTreeExtractor

    The constructor/extractor for SelectFromTypeTree instances.

  33. abstract val SingletonTypeTree: Universe.SingletonTypeTreeExtractor

    The constructor/extractor for SingletonTypeTree instances.

  34. abstract val Star: Universe.StarExtractor

    The constructor/extractor for Star instances.

  35. abstract val Super: Universe.SuperExtractor

    The constructor/extractor for Super instances.

  36. abstract val Template: Universe.TemplateExtractor

    The constructor/extractor for Template instances.

  37. abstract def This(sym: Universe.Symbol): Universe.Tree

    A factory method for This nodes.

  38. abstract val This: Universe.ThisExtractor

    The constructor/extractor for This instances.

  39. abstract val Throw: Universe.ThrowExtractor

    The constructor/extractor for Throw instances.

  40. abstract val Try: Universe.TryExtractor

    The constructor/extractor for Try instances.

  41. abstract val TypeApply: Universe.TypeApplyExtractor

    The constructor/extractor for TypeApply instances.

  42. abstract val TypeBoundsTree: Universe.TypeBoundsTreeExtractor

    The constructor/extractor for TypeBoundsTree instances.

  43. abstract val TypeDef: Universe.TypeDefExtractor

    The constructor/extractor for TypeDef instances.

  44. abstract def TypeTree(tp: Universe.Type): Universe.TypeTree

    A factory method for TypeTree nodes.

  45. abstract val TypeTree: Universe.TypeTreeExtractor

    The constructor/extractor for TypeTree instances.

  46. abstract val Typed: Universe.TypedExtractor

    The constructor/extractor for Typed instances.

  47. abstract val UnApply: Universe.UnApplyExtractor

    The constructor/extractor for UnApply instances.

  48. abstract val ValDef: Universe.ValDefExtractor

    The constructor/extractor for ValDef instances.

  49. abstract def newLazyTreeCopier: Universe.TreeCopier

    Creates a lazy tree copier.

  50. abstract def newStrictTreeCopier: Universe.TreeCopier

    Creates a strict tree copier.

  51. abstract val noSelfType: Universe.ValDef

    An empty deferred value definition corresponding to: val _: _ This is used as a placeholder in the self parameter Template if there is no definition of a self value of self type.

  52. abstract val pendingSuperCall: Universe.Apply

    An empty superclass constructor call corresponding to: super.<init>() This is used as a placeholder in the primary constructor body in class templates to denote the insertion point of a call to superclass constructor after the typechecker figures out the superclass of a given template.

  53. abstract def treeToString(tree: Universe.Tree): String

    Obtains string representation of a tree

    Obtains string representation of a tree

    Attributes
    protected
  54. abstract def Apply(sym: Universe.Symbol, args: Universe.Tree*): Universe.Tree

    A factory method for Apply nodes.

    A factory method for Apply nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"$sym(..$args)" instead

  55. abstract def ApplyConstructor(tpt: Universe.Tree, args: List[Universe.Tree]): Universe.Tree

    0-1 argument list new, based on a type tree.

    0-1 argument list new, based on a type tree.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"new $tpt(..$args)" instead

  56. abstract def Bind(sym: Universe.Symbol, body: Universe.Tree): Universe.Bind

    A factory method for Bind nodes.

    A factory method for Bind nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use the canonical Bind constructor to create a bind and then initialize its symbol manually

  57. abstract def Block(stats: Universe.Tree*): Universe.Block

    A factory method for Block nodes.

    A factory method for Block nodes. Flattens directly nested blocks.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"{..$stats}" instead. Flatten directly nested blocks manually if needed

  58. abstract def CaseDef(pat: Universe.Tree, body: Universe.Tree): Universe.CaseDef

    A factory method for CaseDef nodes.

    A factory method for CaseDef nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use cq"$pat => $body" instead

  59. abstract def Ident(name: String): Universe.Ident

    A factory method for Ident nodes.

    A factory method for Ident nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use Ident(TermName(name)) instead

  60. abstract def New(sym: Universe.Symbol, args: Universe.Tree*): Universe.Tree

    0-1 argument list new, based on a symbol.

    0-1 argument list new, based on a symbol.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"new ${sym.toType}(..$args)" instead

  61. abstract def New(tpe: Universe.Type, args: Universe.Tree*): Universe.Tree

    0-1 argument list new, based on a type.

    0-1 argument list new, based on a type.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"new $tpe(..$args)" instead

  62. abstract def New(tpt: Universe.Tree, argss: List[List[Universe.Tree]]): Universe.Tree

    Factory method for object creation new tpt(args_1)...(args_n) A New(t, as) is expanded to: (new t).<init>(as)

    Factory method for object creation new tpt(args_1)...(args_n) A New(t, as) is expanded to: (new t).<init>(as)

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"new $tpt(...$argss)" instead

  63. abstract def Select(qualifier: Universe.Tree, name: String): Universe.Select

    A factory method for Select nodes.

    A factory method for Select nodes. The string name argument is assumed to represent a TermName.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use Select(tree, TermName(name)) instead

  64. abstract def Super(sym: Universe.Symbol, mix: Universe.TypeName): Universe.Tree

    A factory method for Super nodes.

    A factory method for Super nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"$sym.super[$mix].x".qualifier instead

  65. abstract def Throw(tpe: Universe.Type, args: Universe.Tree*): Universe.Throw

    A factory method for Throw nodes.

    A factory method for Throw nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) use q"throw new $tpe(..$args)" instead

  66. abstract def Try(body: Universe.Tree, cases: (Universe.Tree, Universe.Tree)*): Universe.Try

    A factory method for Try nodes.

    A factory method for Try nodes.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.1) convert cases into casedefs and use q"try $body catch { case ..$newcases }" instead

  67. abstract val emptyValDef: Universe.ValDef
    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) use noSelfType instead

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 Trees to any2stringadd[Trees] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Trees, B)
    Implicit
    This member is added by an implicit conversion from Trees to ArrowAssoc[Trees] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. def Modifiers(flags: Universe.FlagSet): Universe.Modifiers

    The factory for Modifiers instances.

  7. def Modifiers(flags: Universe.FlagSet, privateWithin: Universe.Name): Universe.Modifiers

    The factory for Modifiers instances.

  8. lazy val NoMods: Universe.Modifiers

    An empty Modifiers object: no flags, empty visibility annotation and no Scala annotations.

  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  11. def ensuring(cond: (Trees) ⇒ Boolean, msg: ⇒ Any): Trees
    Implicit
    This member is added by an implicit conversion from Trees to Ensuring[Trees] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: (Trees) ⇒ Boolean): Trees
    Implicit
    This member is added by an implicit conversion from Trees to Ensuring[Trees] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean, msg: ⇒ Any): Trees
    Implicit
    This member is added by an implicit conversion from Trees to Ensuring[Trees] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean): Trees
    Implicit
    This member is added by an implicit conversion from Trees to Ensuring[Trees] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  17. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  18. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from Trees to StringFormat[Trees] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  19. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  20. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  21. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  22. def itransform(transformer: Universe.Transformer, tree: Universe.Tree): Universe.Tree

    Delegates the transformation strategy to scala.reflect.internal.Trees, because pattern matching on abstract types we have here degrades performance.

    Delegates the transformation strategy to scala.reflect.internal.Trees, because pattern matching on abstract types we have here degrades performance.

    Attributes
    protected
  23. def itraverse(traverser: Universe.Traverser, tree: Universe.Tree): Unit

    Delegates the traversal strategy to scala.reflect.internal.Trees, because pattern matching on abstract types we have here degrades performance.

    Delegates the traversal strategy to scala.reflect.internal.Trees, because pattern matching on abstract types we have here degrades performance.

    Attributes
    protected
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. val treeCopy: Universe.TreeCopier

    The standard (lazy) tree copier.

  30. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  31. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  32. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  33. def xtransform(transformer: Universe.Transformer, tree: Universe.Tree): Universe.Tree

    Provides an extension hook for the transformation strategy.

    Provides an extension hook for the transformation strategy. Future-proofs against new node types.

    Attributes
    protected
  34. def xtraverse(traverser: Universe.Traverser, tree: Universe.Tree): Unit

    Provides an extension hook for the traversal strategy.

    Provides an extension hook for the traversal strategy. Future-proofs against new node types.

    Attributes
    protected
  35. def →[B](y: B): (Trees, B)
    Implicit
    This member is added by an implicit conversion from Trees to ArrowAssoc[Trees] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Trees to any2stringadd[Trees]

Inherited by implicit conversion StringFormat from Trees to StringFormat[Trees]

Inherited by implicit conversion Ensuring from Trees to Ensuring[Trees]

Inherited by implicit conversion ArrowAssoc from Trees to ArrowAssoc[Trees]

Trees

Tree Copying

Factories

Tree Traversal and Transformation

API

The methods available for each reflection entity, without the implementation. Since the reflection entities are later overridden by runtime reflection and macros, their API counterparts guarantee a minimum set of methods that are implemented.

Extractors

Extractors provide the machinery necessary to allow pattern matching and construction of reflection entities that is similar to case classes, although the entities are only abstract types that are later overridden.

Ungrouped