# SelectFromTypeTree

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

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

Linear Supertypes
Universe.<refinement>, Universe.<refinement>, Universe.<refinement>, Universe.<refinement>, Universe.<refinement>, Universe.SelectFromTypeTreeApi, Universe.RefTreeApi, Universe.NameTreeApi, Universe.SymTreeApi, Universe.TypTreeApi, Universe.TreeApi, Product, Equals, AnyRef, Any
Ordering
1. Alphabetic
2. By inheritance
Inherited
1. SelectFromTypeTree
2. <refinement>
3. <refinement>
4. <refinement>
5. <refinement>
6. <refinement>
7. SelectFromTypeTreeApi
8. RefTreeApi
9. NameTreeApi
10. SymTreeApi
11. TypTreeApi
12. TreeApi
13. Product
14. Equals
15. AnyRef
16. Any
1. Hide All
2. Show all
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.

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`.

Definition Classes
TreeApi
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.

Definition Classes
TreeApi
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. ```

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

Definition Classes
TreeApi
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).

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).

Definition Classes
TreeApi
6. #### abstract def equalsStructure(that: Universe.Tree): Boolean

Tests whether two trees are structurall equal.

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

Definition Classes
TreeApi
7. #### abstract def exists(p: (Universe.Tree) ⇒ Boolean): Boolean

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

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

Definition Classes
TreeApi
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`

Definition Classes
TreeApi
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.

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

Definition Classes
TreeApi
10. #### abstract def forAll(p: (Universe.Tree) ⇒ Boolean): Boolean

Do all parts of this tree satisfy predicate `p`?

Do all parts of this tree satisfy predicate `p`?

Definition Classes
TreeApi
11. #### abstract def foreach(f: (Universe.Tree) ⇒ Unit): Unit

Apply `f` to each subtree

Apply `f` to each subtree

Definition Classes
TreeApi
12. #### abstract def isDef: Boolean

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

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

Definition Classes
TreeApi
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.

Definition Classes
TreeApi

`canHaveAttrs`

14. #### abstract def isTerm: Boolean

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

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

Definition Classes
TreeApi
15. #### abstract def isType: Boolean

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

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

Definition Classes
TreeApi
16. #### abstract def name: Universe.TypeName

The underlying name.

The underlying name. For example, the `List` part of `Ident(TermName("List"))`.

Definition Classes
SelectFromTypeTreeApiRefTreeApiNameTreeApi
17. #### abstract def nonEmpty: Boolean

Is this tree not an empty tree?

Is this tree not an empty tree?

Definition Classes
TreeApi

`isEmpty`

18. #### 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`.

Definition Classes
TreeApi
19. #### abstract def pos: Universe.Position

Position of the tree.

Position of the tree.

Definition Classes
TreeApi
20. #### abstract def productArity: Int

Definition Classes
Product
21. #### abstract def productElement(n: Int): Any

Definition Classes
Product
22. #### abstract def qualifier: Universe.Tree

The qualifier of the reference.

The qualifier of the reference. For example, the `Ident(TermName("scala"))` part of `Select(Ident(TermName("scala")), TermName("List"))`. `EmptyTree` for `Ident` instances.

Definition Classes
SelectFromTypeTreeApiRefTreeApi
23. #### abstract def symbol: Universe.Symbol

Symbol of the tree.

Symbol of the tree.

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

Trees which are not `SymTree`s 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`.
Definition Classes
SymTreeApiTreeApi
24. #### 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.

Definition Classes
TreeApi
25. #### 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`

Definition Classes
TreeApi

### Concrete Value Members

1. #### final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
2. #### final def ##(): Int

Definition Classes
AnyRef → Any
3. #### final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
4. #### final def asInstanceOf[T0]: T0

Definition Classes
Any
5. #### def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
6. #### final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
7. #### def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
8. #### def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
9. #### final def getClass(): Class[_]

Definition Classes
AnyRef → Any
10. #### def hashCode(): Int

Definition Classes
AnyRef → Any
11. #### final def isInstanceOf[T0]: Boolean

Definition Classes
Any
12. #### final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
13. #### final def notify(): Unit

Definition Classes
AnyRef
14. #### final def notifyAll(): Unit

Definition Classes
AnyRef
15. #### def productIterator: Iterator[Any]

Definition Classes
Product
16. #### def productPrefix: String

Definition Classes
Product
17. #### final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
18. #### def toString(): String

Obtains string representation of a tree

Obtains string representation of a tree

Definition Classes
TreeApi → AnyRef → Any
19. #### final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
20. #### final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
21. #### final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )