This class declares methods that are visible in a CompoundType (i.
This class declares methods that are visible in a SingleType.
This class declares operations that are visible in a Type.
The ClassInfo type signature is used to define parents and declarations
of classes, traits, and objects.
The ClassInfo type signature is used to define parents and declarations
of classes, traits, and objects. If a class, trait, or object C is declared like this
C extends P_1 with ... with P_m { D_1; ...; D_n}
its ClassInfo type has the following form:
ClassInfo(List(P_1, ..., P_m), Scope(D_1, ..., D_n), C)
An extractor class to create and pattern match with syntax ClassInfo(parents, decls, clazz)
Here, parents is the list of parent types of the class, decls is the scope
containing all declarations in the class, and clazz is the symbol of the class
itself.
A subtype of Type representing refined types as well as ClassInfo signatures.
The ConstantType type is not directly written in user programs, but arises as the type of a constant.
The ConstantType type is not directly written in user programs, but arises as the type of a constant.
The REPL expresses constant types like Int(11). Here are some constants with their types.
1 ConstantType(Constant(1))
"abc" ConstantType(Constant("abc"))
An extractor class to create and pattern match with syntax ConstantType(constant)
Here, constant is the constant value represented by the type.
The MethodType type signature is used to indicate parameters and result type of a method
An extractor class to create and pattern match with syntax MethodType(params, respte)
Here, params is a potentially empty list of parameter symbols of the method,
and restpe is the result type of the method.
The RefinedType type defines types of any of the forms on the left,
with their RefinedType representations to the right.
The RefinedType type defines types of any of the forms on the left,
with their RefinedType representations to the right.
P_1 with ... with P_m { D_1; ...; D_n} RefinedType(List(P_1, ..., P_m), Scope(D_1, ..., D_n))
P_1 with ... with P_m RefinedType(List(P_1, ..., P_m), Scope())
{ D_1; ...; D_n} RefinedType(List(AnyRef), Scope(D_1, ..., D_n))
An extractor class to create and pattern match with syntax RefinedType(parents, decls)
Here, parents is the list of parent types of the class, and decls is the scope
containing all declarations in the class.
The SingleType type describes types of any of the forms on the left,
with their TypeRef representations to the right.
The SingleType type describes types of any of the forms on the left,
with their TypeRef representations to the right.
(T # x).type SingleType(T, x)
p.x.type SingleType(p.type, x)
x.type SingleType(NoPrefix, x)
An extractor class to create and pattern match with syntax SingleType(pre, sym)
Here, pre is the prefix of the single-type, and sym is the stable value symbol
referred to by the single-type.
The type of Scala singleton types, i.
The type of Scala singleton types, i.e. types that are inhabited by only one nun-null value. These include types of the forms
C.this.type C.super.type x.type
as well as constant types.
The SuperType type is not directly written, but arises when C.super is used
as a prefix in a TypeRef or SingleType.
The SuperType type is not directly written, but arises when C.super is used
as a prefix in a TypeRef or SingleType. It's internal presentation is
SuperType(thistpe, supertpe)
Here, thistpe is the type of the corresponding this-type. For instance,
in the type arising from C.super, the thistpe part would be ThisType(C).
supertpe is the type of the super class referred to by the super.
An extractor class to create and pattern match with syntax SingleType(thistpe, supertpe)
The ThisType type describes types of the form on the left with the
correspnding ThisType representations to the right.
The ThisType type describes types of the form on the left with the
correspnding ThisType representations to the right.
C.this.type ThisType(C)
An extractor class to create and pattern match with syntax ThisType(sym)
where sym is the class prefix of the this type.
The type of Scala types, and also Scala type signatures.
The type of Scala types, and also Scala type signatures. (No difference is internally made between the two).
The TypeBounds type signature is used to indicate lower and upper type bounds
of type parameters and abstract types.
The TypeBounds type signature is used to indicate lower and upper type bounds
of type parameters and abstract types. It is not a first-class type.
If an abstract type or type parameter is declared with any of the forms
on the left, its type signature is the TypeBounds type on the right.
T >: L <: U TypeBounds(L, U)
T >: L TypeBounds(L, Any)
T <: U TypeBounds(Nothing, U)
An extractor class to create and pattern match with syntax TypeBound(lower, upper)
Here, lower is the lower bound of the TypeBounds pair, and upper is
the upper bound.
The TypeRef type describes types of any of the forms on the left,
with their TypeRef representations to the right.
The TypeRef type describes types of any of the forms on the left,
with their TypeRef representations to the right.
T # C[T_1, ..., T_n] TypeRef(T, C, List(T_1, ..., T_n))
p.C[T_1, ..., T_n] TypeRef(p.type, C, List(T_1, ..., T_n))
C[T_1, ..., T_n] TypeRef(NoPrefix, C, List(T_1, ..., T_n))
T # C TypeRef(T, C, Nil)
p.C TypeRef(p.type, C, Nil)
C TypeRef(NoPrefix, C, Nil)
An extractor class to create and pattern match with syntax TypeRef(pre, sym, args)
Here, pre is the prefix of the type reference, sym is the symbol
referred to by the type reference, and args is a possible empty list of
type argumenrts.
The constructor/deconstructor for ClassInfoType instances.
The constructor/deconstructor for ConstantType instances.
The constructor/deconstructor for MethodType instances.
This constant is used as a special value denoting the empty prefix in a path dependent type.
This constant is used as a special value denoting the empty prefix in a path dependent type.
For instance x.type is represented as SingleType(NoPrefix, <x>), where <x> stands for
the symbol for x.
This constant is used as a special value that indicates that no meaningful type exists.
The constructor/deconstructor for RefinedType instances.
The constructor/deconstructor for SingleType instances.
The constructor/deconstructor for SuperType instances.
The constructor/deconstructor for ThisType instances.
The constructor/deconstructor for TypeBounds instances.
The constructor/deconstructor for TypeRef instances.
The greatest lower bound wrt <:< of a list of types
The least upper bound wrt <:< of a list of types
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
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.