trait SwitchEmission extends TreeMakers with MatchMonadInterface
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Type Members
-
class
Substitution
extends AnyRef
- Definition Classes
- TypedSubstitution
-
trait
AbsCodegen
extends AnyRef
- Definition Classes
- CodegenCore
-
trait
Casegen
extends AbsCodegen
- Definition Classes
- CodegenCore
-
abstract
class
CommonCodegen
extends AbsCodegen
- Definition Classes
- CodegenCore
- class RegularSwitchMaker extends SwitchMaker
- abstract class SwitchMaker extends AnyRef
-
case class
AlternativesTreeMaker
(prevBinder: Global.Symbol, altss: List[List[TreeMaker]], pos: Global.Position) extends TreeMaker with NoNewBinders with Product with Serializable
- Definition Classes
- TreeMakers
-
case class
BodyTreeMaker
(body: Global.Tree, matchPt: Global.Type) extends TreeMaker with NoNewBinders with Product with Serializable
- Definition Classes
- TreeMakers
-
sealed abstract
class
CondTreeMaker
extends FunTreeMaker
- Definition Classes
- TreeMakers
-
case class
EqualityTestTreeMaker
(prevBinder: Global.Symbol, patTree: Global.Tree, pos: Global.Position) extends CondTreeMaker with Product with Serializable
- Definition Classes
- TreeMakers
-
case class
ExtractorTreeMaker
(extractor: Global.Tree, extraCond: Option[Global.Tree], nextBinder: Global.Symbol)(subPatBinders: List[Global.Symbol], subPatRefs: List[Global.Tree], potentiallyMutableBinders: Set[Global.Symbol], extractorReturnsBoolean: Boolean, checkedLength: Option[Int], prevBinder: Global.Symbol, ignoredSubPatBinders: Set[Global.Symbol]) extends FunTreeMaker with PreserveSubPatBinders with Product with Serializable
Make a TreeMaker that will result in an extractor call specified by
extractor
the next TreeMaker (here, we don't know which it'll be) is chained after this one by flatMap'ing a function with bindernextBinder
over our extractor's result the function's body is determined by the next TreeMaker (furthermore, the interpretation offlatMap
depends on the codegen instance we're using).Make a TreeMaker that will result in an extractor call specified by
extractor
the next TreeMaker (here, we don't know which it'll be) is chained after this one by flatMap'ing a function with bindernextBinder
over our extractor's result the function's body is determined by the next TreeMaker (furthermore, the interpretation offlatMap
depends on the codegen instance we're using).The values for the subpatterns, as computed by the extractor call in
extractor
, are stored in local variables that re-use the symbols insubPatBinders
. This makes extractor patterns more debuggable (SI-5739).- Definition Classes
- TreeMakers
-
sealed abstract
class
FunTreeMaker
extends TreeMaker
- Definition Classes
- TreeMakers
-
case class
GuardTreeMaker
(guardTree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable
- Definition Classes
- TreeMakers
-
sealed
trait
NoNewBinders
extends TreeMaker
- Definition Classes
- TreeMakers
-
sealed
trait
PreserveSubPatBinders
extends TreeMaker
- Definition Classes
- TreeMakers
-
case class
ProductExtractorTreeMaker
(prevBinder: Global.Symbol, extraCond: Option[Global.Tree])(subPatBinders: List[Global.Symbol], subPatRefs: List[Global.Tree], mutableBinders: List[Global.Symbol], binderKnownNonNull: Boolean, ignoredSubPatBinders: Set[Global.Symbol]) extends FunTreeMaker with PreserveSubPatBinders with Product with Serializable
An optimized version of ExtractorTreeMaker for Products.
An optimized version of ExtractorTreeMaker for Products. For now, this is hard-coded to case classes, and we simply extract the case class fields.
The values for the subpatterns, as specified by the case class fields at the time of extraction, are stored in local variables that re-use the symbols in
subPatBinders
. This makes extractor patterns more debuggable (SI-5739) as well as avoiding mutation after the pattern has been matched (SI-5158, SI-6070)TODO: make this user-definable as follows When a companion object defines a method
def unapply_1(x: T): U_1
, but nodef unapply
ordef unapplySeq
, the extractor is considered to match any non-null value of type T the pattern is expected to have as many sub-patterns as there aredef unapply_I(x: T): U_I
methods, and the type of the I'th sub-pattern isU_I
. The same exception for Seq patterns applies: if the last extractor is of typeSeq[U_N]
, the pattern must have at least N arguments (exactly N if the last argument is annotated with: _*
). The arguments starting at N (and beyond) are taken from the sequence returned by apply_N, and it is checked that that sequence has enough elements to provide values for all expected sub-patterns.For a case class C, the implementation is assumed to be
def unapply_I(x: C) = x._I
, and the extractor call is inlined under that assumption.- Definition Classes
- TreeMakers
-
case class
SubstOnlyTreeMaker
(prevBinder: Global.Symbol, nextBinder: Global.Symbol) extends TreeMaker with Product with Serializable
- Definition Classes
- TreeMakers
-
abstract
class
TreeMaker
extends AnyRef
- Definition Classes
- TreeMakers
-
case class
TrivialTreeMaker
(tree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable
- Definition Classes
- TreeMakers
-
case class
TypeTestTreeMaker
(prevBinder: Global.Symbol, testedBinder: Global.Symbol, expectedTp: Global.Type, nextBinderTp: Global.Type)(pos: Global.Position, extractorArgTypeTest: Boolean = false) extends CondTreeMaker with Product with Serializable
implements the run-time aspects of (§8.2) (typedPattern has already done the necessary type transformations)
implements the run-time aspects of (§8.2) (typedPattern has already done the necessary type transformations)
Type patterns consist of types, type variables, and wildcards. A type pattern T is of one of the following forms:
- A reference to a class C, p.C, or T#C. This type pattern matches any non-null instance of the given class. Note that the prefix of the class, if it is given, is relevant for determining class instances. For instance, the pattern p.C matches only instances of classes C which were created with the path p as prefix. The bottom types scala.Nothing and scala.Null cannot be used as type patterns, because they would match nothing in any case.
- A singleton type p.type. This type pattern matches only the value denoted by the path p (that is, a pattern match involved a comparison of the matched value with p using method eq in class AnyRef). // TODO: the actual pattern matcher uses ==, so that's what I'm using for now // https://issues.scala-lang.org/browse/SI-4577 "pattern matcher, still disappointing us at equality time"
- A compound type pattern T1 with ... with Tn where each Ti is a type pat- tern. This type pattern matches all values that are matched by each of the type patterns Ti.
- A parameterized type pattern T[a1,...,an], where the ai are type variable patterns or wildcards _. This type pattern matches all values which match T for some arbitrary instantiation of the type variables and wildcards. The bounds or alias type of these type variable are determined as described in (§8.3).
- A parameterized type pattern scala.Array[T1], where T1 is a type pattern. // TODO This type pattern matches any non-null instance of type scala.Array[U1], where U1 is a type matched by T1.
- Definition Classes
- TreeMakers
Abstract Value Members
-
abstract
def
analyzeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, suppression: MatchOptimization.Suppression): Unit
- Definition Classes
- TreeMakers
-
abstract
def
codegen: AbsCodegen
- Definition Classes
- CodegenCore
-
abstract
def
optimizeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type): (List[List[TreeMaker]], List[Global.Tree])
- Definition Classes
- TreeMakers
-
abstract
val
typer: (analyzer)#Typer
- Definition Classes
- MatchMonadInterface
Concrete Value Members
-
object
EmptySubstitution
extends Substitution
- Definition Classes
- TypedSubstitution
-
object
Substitution
- Definition Classes
- TypedSubstitution
-
final
def
!=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
true
if !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
Equivalent to
x.hashCode
except for boxed numeric types andnull
.Equivalent to
x.hashCode
except for boxed numeric types andnull
. 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. Fornull
returns a hashcode wherenull.hashCode
throws aNullPointerException
.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
-
def
+(other: String): String
- Implicit
- This member is added by an implicit conversion from SwitchEmission to any2stringadd[SwitchEmission] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
-
def
->[B](y: B): (SwitchEmission, B)
- Implicit
- This member is added by an implicit conversion from SwitchEmission to ArrowAssoc[SwitchEmission] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
-
final
def
==(arg0: Any): Boolean
The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.- returns
true
if the receiver object is equivalent to the argument;false
otherwise.
- Definition Classes
- AnyRef → Any
-
final
def
asInstanceOf[T0]: T0
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 aClassCastException
at runtime, while the expressionList(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.- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastException
if the receiver object is not an instance of the erasure of typeT0
.
-
def
clone(): AnyRef
Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the
clone
method is platform dependent.- returns
a copy of the receiver object.
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
- Note
not specified by SLS as a member of AnyRef
-
def
combineCases(scrut: Global.Tree, scrutSym: Global.Symbol, casesRaw: List[List[TreeMaker]], pt: Global.Type, owner: Global.Symbol, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree]): Global.Tree
- Definition Classes
- TreeMakers
-
def
combineCasesNoSubstOnly(scrut: Global.Tree, scrutSym: Global.Symbol, casesNoSubstOnly: List[List[TreeMaker]], pt: Global.Type, owner: Global.Symbol, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree]): Global.Tree
- Definition Classes
- TreeMakers
-
def
combineExtractors(treeMakers: List[TreeMaker])(casegen: Casegen): Global.Tree
- Definition Classes
- TreeMakers
-
val
debugInfoEmitVars: Boolean
- Attributes
- protected
- Definition Classes
- TreeMakers
-
def
emitSwitch(scrut: Global.Tree, scrutSym: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, matchFailGenOverride: Option[(Global.Tree) ⇒ Global.Tree], unchecked: Boolean): Option[Global.Tree]
- Definition Classes
- SwitchEmission → TreeMakers
-
def
emitTypeSwitch(bindersAndCases: List[(Global.Symbol, List[TreeMaker])], pt: Global.Type): Option[List[Global.CaseDef]]
- Definition Classes
- SwitchEmission → TreeMakers
-
def
ensuring(cond: (SwitchEmission) ⇒ Boolean, msg: ⇒ Any): SwitchEmission
- Implicit
- This member is added by an implicit conversion from SwitchEmission to Ensuring[SwitchEmission] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: (SwitchEmission) ⇒ Boolean): SwitchEmission
- Implicit
- This member is added by an implicit conversion from SwitchEmission to Ensuring[SwitchEmission] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean, msg: ⇒ Any): SwitchEmission
- Implicit
- This member is added by an implicit conversion from SwitchEmission to Ensuring[SwitchEmission] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean): SwitchEmission
- Implicit
- This member is added by an implicit conversion from SwitchEmission to Ensuring[SwitchEmission] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
final
def
eq(arg0: AnyRef): Boolean
Tests whether the argument (
that
) is a reference to the receiver object (this
).Tests whether the argument (
that
) is a reference to the receiver object (this
).The
eq
method implements an equivalence relation on non-null instances ofAnyRef
, and has three additional properties:- It is consistent: for any non-null instances
x
andy
of typeAnyRef
, multiple invocations ofx.eq(y)
consistently returnstrue
or consistently returnsfalse
. - For any non-null instance
x
of typeAnyRef
,x.eq(null)
andnull.eq(x)
returnsfalse
. null.eq(null)
returnstrue
.
When overriding the
equals
orhashCode
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
).- returns
true
if the argument is a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
-
def
equals(arg0: Any): Boolean
The equality method for reference types.
-
def
finalize(): Unit
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 betweenfinalize
and non-local returns and exceptions, are all platform dependent.- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] )
- Note
not specified by SLS as a member of AnyRef
-
def
fixerUpper(origOwner: Global.Symbol, pos: Global.Position): Global.Traverser
- Attributes
- protected
- Definition Classes
- TreeMakers
-
def
formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from SwitchEmission to StringFormat[SwitchEmission] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @inline()
-
def
freshName(prefix: String): Global.TermName
- Definition Classes
- CodegenCore
-
def
freshSym(pos: Global.Position, tp: Global.Type = NoType, prefix: String = "x"): Global.TermSymbol
- Definition Classes
- CodegenCore
-
final
def
getClass(): Class[_]
Returns the runtime class representation of the object.
Returns the runtime class representation of the object.
- returns
a class object corresponding to the runtime type of the receiver.
- Definition Classes
- AnyRef → Any
-
def
hashCode(): Int
The hashCode method for reference types.
-
final
def
isInstanceOf[T0]: Boolean
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 returnfalse
, while the expressionList(1).isInstanceOf[List[String]]
will returntrue
. 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.- returns
true
if the receiver object is an instance of erasure of typeT0
;false
otherwise.
- Definition Classes
- Any
-
val
matchOwner: Global.Symbol
- Definition Classes
- MatchMonadInterface
-
final
def
ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that)
.Equivalent to
!(this eq that)
.- returns
true
if the argument is not a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
-
def
newSynthCaseLabel(name: String): Global.MethodSymbol
- Definition Classes
- CodegenCore
-
final
def
notify(): Unit
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.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
final
def
notifyAll(): Unit
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.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
def
propagateSubstitution(treeMakers: List[TreeMaker], initial: Substitution): List[TreeMaker]
- Definition Classes
- TreeMakers
-
def
pureType(tp: Global.Type): Global.Type
- Definition Classes
- MatchMonadInterface
-
def
removeSubstOnly(makers: List[TreeMaker]): collection.immutable.List[TreeMaker]
- Definition Classes
- TreeMakers
-
def
reportMissingCases(pos: Global.Position, counterExamples: List[String]): Unit
- Definition Classes
- MatchMonadInterface
-
def
reportUnreachable(pos: Global.Position): Unit
- Definition Classes
- MatchMonadInterface
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
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.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
def
→[B](y: B): (SwitchEmission, B)
- Implicit
- This member is added by an implicit conversion from SwitchEmission to ArrowAssoc[SwitchEmission] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
-
object
IrrefutableExtractorTreeMaker
- Definition Classes
- TreeMakers
-
object
TypeTestTreeMaker
extends Serializable
- Definition Classes
- TreeMakers
The Scala compiler API.
The following resources are useful for Scala plugin/compiler development: