scala.reflect.api.Trees

# Throw

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

Throw expression

Source
  Trees.scala

Linear Supertypes
Universe.<refinement>, Universe.<refinement>, Universe.ThrowApi, Universe.TermTreeApi, Universe.TreeApi, Product, Equals, AnyRef, Any
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Inherited

1. Throw
2. <refinement>
3. <refinement>
4. ThrowApi
5. TermTreeApi
6. TreeApi
7. Product
8. Equals
9. AnyRef
10. Any

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### 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`.

   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 expr: Universe.Tree

   The thrown expression.

   The thrown expression.

   Definition Classes
     ThrowApi

9. #### 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

10. #### 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

11. #### 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

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

    Apply `f` to each subtree

    Apply `f` to each subtree

    Definition Classes
      TreeApi

13. #### 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

14. #### 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
    See also

      `canHaveAttrs`

15. #### 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

16. #### 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

17. #### abstract def nonEmpty: Boolean

    Is this tree not an empty tree?

    Is this tree not an empty tree?

    Definition Classes
      TreeApi
    See also

      `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 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
      TreeApi

23. #### 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

24. #### 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( ... )

### Inherited from Universe.<refinement>

### Inherited from Universe.ThrowApi

### Inherited from Universe.TermTreeApi

### Inherited from Universe.TreeApi

### Inherited from Product

### Inherited from Equals

### Inherited from AnyRef

### Inherited from Any

### Ungrouped