Type of the wrapped expression tree as found in the underlying tree.
Migrates the expression into another mirror, jumping into a different universe if necessary.
Underlying mirror of this expr.
A dummy method to mark expression splicing in reification.
A dummy method to mark expression splicing in reification.
It should only be used within a reify call, which eliminates the splice call and embeds
the wrapped tree into the reified surrounding expression.
If used alone splice throws an exception when called at runtime.
If you want to use an Expr in reification of some Scala code, you need to splice it in.
For an expr of type Expr[T], where T has a method foo, the following code
reify{ expr.splice.foo }uses splice to turn an expr of type Expr[T] into a value of type T in the context of reify.
It is equivalent to
Select( expr.tree, newTermName("foo") )The following example code however does not compile
reify{ expr.foo }because expr of type Expr[T] itself does not have a method foo.
Type of the wrapped expression tree as provided during creation.
Type of the wrapped expression tree as provided during creation.
When exprs are created by the compiler, staticType represents
a statically known type of the tree as calculated at that point by the compiler.
The Scala abstract syntax tree representing the wrapped expression.
A dummy value to denote cross-stage path-dependent type dependencies.
A dummy value to denote cross-stage path-dependent type dependencies.
For example for the following macro definition:
class X { type T } object Macros { def foo(x: X): x.T = macro Impls.foo_impl }
The corresponding macro implementation should have the following signature (note how the return type denotes path-dependency on x):
object Impls { def foo_impl(c: Context)(x: c.Expr[X]): c.Expr[x.value.T] = ... }
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.
A method that should be called from every well-designed equals method that is open to be overridden in a subclass.
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 universal equality method defined in AnyRef.
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.
Returns string formatted according to given format string.
Returns string formatted according to given format string.
Format strings are as for String.format
(@see java.lang.String.format).
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
Creates a String representation of this object.
(expr: StringAdd).self
(expr: StringFormat).self
(expr: ArrowAssoc[Universe.Expr[T]]).x
(Since version 2.10.0) Use leftOfArrow instead
(expr: Ensuring[Universe.Expr[T]]).x
(Since version 2.10.0) Use resultOfEnsuring instead
Expr wraps an abstract syntax tree and tags it with its type. The main source of information about exprs is the scala.reflect.api.Exprs page.