A method that should be called from every well-designed equals method that is open to be overridden in a subclass.
A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.
the value being probed for possible equality
true if this instance can possibly equal that, otherwise false
The direct child trees of this tree.
The direct child trees of this tree. EmptyTrees are always omitted. Lists are flattened.
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.
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).
Tests whether two trees are structurall equal.
Tests whether two trees are structurall equal.
Note that == on trees is reference equality.
Is there exists a part of this tree which satisfies predicate p?
Is there exists a part of this tree which satisfies predicate p?
Find all subtrees matching predicate p.
Find all subtrees matching predicate p. Same as withFilter
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.
Do all parts of this tree satisfy predicate p?
Do all parts of this tree satisfy predicate p?
Apply f to each subtree
Apply f to each subtree
Extracts free term symbols from a tree that is reified or contains reified subtrees.
Extracts free term symbols from a tree that is reified or contains reified subtrees.
Extracts free type symbols from a tree that is reified or contains reified subtrees.
Extracts free type symbols from a tree that is reified or contains reified subtrees.
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)
Is this tree one of the empty trees?
Empty trees are: the EmptyTree null object, TypeTree instances that don't carry a type
and the special emptyValDef singleton.
Is this tree one of the empty trees?
Empty trees are: the EmptyTree null object, TypeTree instances that don't carry a type
and the special emptyValDef singleton.
The canonical way to test if a Tree represents a term.
The canonical way to test if a Tree represents a term.
The canonical way to test if a Tree represents a type.
The canonical way to test if a Tree represents a type.
The underlying name.
The underlying name.
For example, the <List> part of Ident("List": TermName).
Provides an alternate if tree is empty
Provides an alternate if tree is empty
The alternate tree
If this tree is non empty, this tree, otherwise alt.
Position of the tree.
Position of the tree.
The size of this product.
The nth element of this product, 0-based.
The nth element of this product, 0-based. In other words, for a
product A(x1, ..., xk), returns x(n+1) where 0 < n < k.
the index of the element to return
the element n elements after the first element
The qualifier of the reference.
The qualifier of the reference.
For example, the <scala> part of Select("scala": TermName, "List": TermName).
EmptyTree for Ident instances.
Substitute symbols in to for corresponding occurrences of references to
symbols from in this type.
Substitute symbols in to for corresponding occurrences of references to
symbols from in this type.
Substitute given tree to for occurrences of nodes that represent
C.this, where C referes to the given class clazz.
Substitute given tree to for occurrences of nodes that represent
C.this, where C referes to the given class clazz.
Substitute types in to for corresponding occurrences of references to
symbols from in this tree.
Substitute types in to for corresponding occurrences of references to
symbols from in this tree.
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.
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.
Find all subtrees matching predicate p.
Find all subtrees matching predicate p. Same as filter
Test two objects for inequality.
Test two objects for inequality.
true if !(this == that), false otherwise.
Equivalent to x.hashCode except for boxed numeric types and null.
Equivalent to x.hashCode except for boxed numeric types and null.
For numerics, it returns a hash value which is consistent
with value equality: if two value type instances compare
as true, then ## will produce the same hash value for each
of them.
For null returns a hashcode where null.hashCode throws a
NullPointerException.
a hash value consistent with ==
Test two objects for equality.
Test two objects for equality.
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
true if the receiver object is equivalent to the argument; false otherwise.
Cast the receiver object to be of type T0.
Cast the receiver object to be of type T0.
Note that the success of a cast at runtime is modulo Scala's erasure semantics.
Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at
runtime, while the expression List(1).asInstanceOf[List[String]] will not.
In the latter example, because the type argument is erased as part of compilation it is
not possible to check whether the contents of the list are of the requested type.
the receiver object.
if the receiver object is not an instance of the erasure of type T0.
Create a copy of the receiver object.
Tests whether the argument (arg0) is a reference to the receiver object (this).
Tests whether the argument (arg0) is a reference to the receiver object (this).
The eq method implements an equivalence relation on
non-null instances of AnyRef, and has three additional properties:
x and y of type AnyRef, multiple invocations of
x.eq(y) consistently returns true or consistently returns false.x of type AnyRef, x.eq(null) and null.eq(x) returns false.null.eq(null) returns true. When overriding the equals or hashCode methods, it is important to ensure that their behavior is
consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they
should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).
true if the argument is a reference to the receiver object; false otherwise.
The equality method for reference types.
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize method is invoked, as
well as the interaction between finalize and non-local returns
and exceptions, are all platform dependent.
A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
not specified by SLS as a member of AnyRef
The hashCode method for reference types.
Test whether the dynamic type of the receiver object is T0.
Test whether the dynamic type of the receiver object is T0.
Note that the result of the test is modulo Scala's erasure semantics.
Therefore the expression 1.isInstanceOf[String] will return false, while the
expression List(1).isInstanceOf[List[String]] will return true.
In the latter example, because the type argument is erased as part of compilation it is
not possible to check whether the contents of the list are of the specified type.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Equivalent to !(this eq that).
Equivalent to !(this eq that).
true if the argument is not a reference to the receiver object; false otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
An iterator over all the elements of this product.
An iterator over all the elements of this product.
in the default implementation, an Iterator[Any]
A string used in the toString methods of derived classes.
A string used in the toString methods of derived classes.
Implementations may override this method to prepend a string prefix
to the result of toString methods.
in the default implementation, the empty string
Obtains string representation of a tree
A reference to identifier
name.