Packages

trait TreeApi extends Product

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

Self Type
Universe.Tree
Source
Trees.scala
Linear Supertypes
Product, Equals, AnyRef, Any
Known Subclasses
ReferenceToBoxed, ReferenceToBoxedApi, Alternative, AlternativeApi, Annotated, AnnotatedApi, AppliedTypeTree, AppliedTypeTreeApi, Apply, ApplyApi, Assign, AssignApi, AssignOrNamedArg, AssignOrNamedArgApi, Bind, BindApi, Block, BlockApi, CaseDef, CaseDefApi, ClassDef, ClassDefApi, CompoundTypeTree, CompoundTypeTreeApi, DefDef, DefDefApi, DefTree, DefTreeApi, ExistentialTypeTree, ExistentialTypeTreeApi, Function, FunctionApi, GenericApply, GenericApplyApi, Ident, IdentApi, If, IfApi, ImplDef, ImplDefApi, Import, ImportApi, LabelDef, LabelDefApi, Literal, LiteralApi, Match, MatchApi, MemberDef, MemberDefApi, ModuleDef, ModuleDefApi, NameTree, NameTreeApi, New, NewApi, PackageDef, PackageDefApi, RefTree, RefTreeApi, Return, ReturnApi, Select, SelectApi, SelectFromTypeTree, SelectFromTypeTreeApi, SingletonTypeTree, SingletonTypeTreeApi, Star, StarApi, Super, SuperApi, SymTree, SymTreeApi, Template, TemplateApi, TermTree, TermTreeApi, This, ThisApi, Throw, ThrowApi, Tree, Try, TryApi, TypTree, TypTreeApi, TypeApply, TypeApplyApi, TypeBoundsTree, TypeBoundsTreeApi, TypeDef, TypeDefApi, TypeTree, TypeTreeApi, Typed, TypedApi, UnApply, UnApplyApi, ValDef, ValDefApi, ValOrDefDef, ValOrDefDefApi
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Inherited
  1. TreeApi
  2. Product
  3. Equals
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def canEqual(that: Any): Boolean
    Definition Classes
    Equals
  2. abstract def canHaveAttrs: Boolean

    Can this tree carry attributes (i.e.

    Can this tree carry attributes (i.e. symbols, types or positions)? Typically the answer is yes, except for the EmptyTree null object and two special singletons: noSelfType and pendingSuperCall.

  3. abstract def children: List[Universe.Tree]

    The direct child trees of this tree.

    The direct child trees of this tree. EmptyTrees are always omitted. Lists are flattened.

  4. abstract def collect[T](pf: PartialFunction[Universe.Tree, T]): List[T]

    Apply pf to each subtree on which the function is defined and collect the results.

  5. abstract def duplicate: TreeApi.this.type

    Make a copy of this tree, keeping all attributes, except that all positions are focused (so nothing in this tree will be found when searching by position).

  6. abstract def equalsStructure(that: Universe.Tree): Boolean

    Tests whether two trees are structurally equal.

    Tests whether two trees are structurally equal. Note that == on trees is reference equality.

  7. abstract def exists(p: (Universe.Tree) ⇒ Boolean): Boolean

    Is there exists a part of this tree which satisfies predicate p?

  8. abstract def filter(f: (Universe.Tree) ⇒ Boolean): List[Universe.Tree]

    Find all subtrees matching predicate p.

    Find all subtrees matching predicate p. Same as withFilter

  9. abstract def find(p: (Universe.Tree) ⇒ Boolean): Option[Universe.Tree]

    Returns optionally first tree (in a preorder traversal) which satisfies predicate p, or None if none exists.

  10. abstract def forAll(p: (Universe.Tree) ⇒ Boolean): Boolean

    Do all parts of this tree satisfy predicate p?

  11. abstract def foreach(f: (Universe.Tree) ⇒ Unit): Unit

    Apply f to each subtree

  12. abstract def isDef: Boolean

    Does this tree represent a definition? (of a method, of a class, etc)

  13. abstract def isEmpty: Boolean

    Is this tree one of the empty trees?

    Is this tree one of the empty trees?

    Empty trees are: the EmptyTree null object and TypeTree instances that don't carry a type.

    See also

    canHaveAttrs

  14. abstract def isTerm: Boolean

    The canonical way to test if a Tree represents a term.

  15. abstract def isType: Boolean

    The canonical way to test if a Tree represents a type.

  16. abstract def nonEmpty: Boolean

    Is this tree not an empty tree?

    Is this tree not an empty tree?

    See also

    isEmpty

  17. abstract def orElse(alt: ⇒ Universe.Tree): Universe.Tree

    Provides an alternate if tree is empty

    Provides an alternate if tree is empty

    alt

    The alternate tree

    returns

    If this tree is non empty, this tree, otherwise alt.

  18. abstract def pos: Universe.Position

    Position of the tree.

  19. abstract def productArity: Int
    Definition Classes
    Product
  20. abstract def productElement(n: Int): Any
    Definition Classes
    Product
  21. abstract def symbol: Universe.Symbol

    Symbol of the tree.

    Symbol of the tree.

    For most trees symbol is null. In SymTrees, it is overridden and implemented with a var, initialized to NoSymbol.

    Trees which are not SymTrees but which carry symbols do so by overriding def symbol to forward it elsewhere. Examples:

    • Super(qual, _) has qual's symbol,
    • Apply(fun, args) has fun's symbol,
    • TypeApply(fun, args) has fun's symbol,
    • AppliedTypeTree(tpt, args) has tpt's symbol,
    • TypeTree(tpe) has tpe's typeSymbol, if tpe != null.
  22. abstract def tpe: Universe.Type

    Type of the tree.

    Type of the tree.

    Upon creation most trees have their tpe set to null. Types are typically assigned to trees during typechecking. Some node factory methods set tpe immediately after creation.

    When the typechecker encounters a tree with a non-null tpe, it will assume it to be correct and not check it again. This means one has to be careful not to erase the tpe field of subtrees.

  23. abstract def withFilter(f: (Universe.Tree) ⇒ Boolean): List[Universe.Tree]

    Find all subtrees matching predicate p.

    Find all subtrees matching predicate p. Same as filter

Concrete Value Members

  1. def productIterator: Iterator[Any]
    Definition Classes
    Product
  2. def productPrefix: String
    Definition Classes
    Product
  3. def toString(): String

    Obtains string representation of a tree

    Obtains string representation of a tree

    Definition Classes
    TreeApi → AnyRef → Any