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scala.tools.nsc.transform.patmat.PatternMatching

OptimizingMatchTranslator

class OptimizingMatchTranslator extends MatchTranslator with MatchOptimizer with MatchAnalyzer with Solver

Source
PatternMatching.scala
Linear Supertypes
PatternMatching.Solver, PatternMatching.CNF, PatternMatching.MatchAnalyzer, PatternMatching.MatchOptimizer, PatternMatching.CommonSubconditionElimination, PatternMatching.MatchApproximator, PatternMatching.TreesAndTypesDomain, PatternMatching.CheckableTreeAndTypeAnalysis, PatternMatching.PropositionalLogic, PatternMatching.SwitchEmission, PatternMatching.OptimizedCodegen, PatternMatching.MatchTranslator, PatternMatching.TreeMakerWarnings, PatternMatching.TreeMakers, PatternMatching.CodegenCore, PatternMatching.TypedSubstitution, PatternMatching.MatchMonadInterface, AnyRef, Any
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. OptimizingMatchTranslator
  2. Solver
  3. CNF
  4. MatchAnalyzer
  5. MatchOptimizer
  6. CommonSubconditionElimination
  7. MatchApproximator
  8. TreesAndTypesDomain
  9. CheckableTreeAndTypeAnalysis
  10. PropositionalLogic
  11. SwitchEmission
  12. OptimizedCodegen
  13. MatchTranslator
  14. TreeMakerWarnings
  15. TreeMakers
  16. CodegenCore
  17. TypedSubstitution
  18. MatchMonadInterface
  19. AnyRef
  20. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new OptimizingMatchTranslator(typer: (analyzer)#Typer, selectorPos: Global.Position)

Type Members

  1. class Substitution extends AnyRef
    Definition Classes
    TypedSubstitution
  2. trait AbsVar extends AnyRef
    Definition Classes
    PropositionalLogic
  3. final case class And(ops: Set[Prop]) extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  4. final case class AtMostOne(ops: List[Sym]) extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  5. final case class Eq(p: Var, q: Const) extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  6. final case class Not(a: Prop) extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  7. final case class Or(ops: Set[Prop]) extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  8. sealed abstract class Prop extends AnyRef
    Definition Classes
    PropositionalLogic
  9. trait PropMap extends AnyRef
    Definition Classes
    PropositionalLogic
  10. trait PropTraverser extends AnyRef
    Definition Classes
    PropositionalLogic
  11. final case class Solution(model: Model, unassigned: List[Sym]) extends Product with Serializable
    Definition Classes
    PropositionalLogic
  12. final class Sym extends Prop
    Definition Classes
    PropositionalLogic
  13. trait TypeConstExtractor extends AnyRef
    Definition Classes
    PropositionalLogic
  14. trait ValueConstExtractor extends AnyRef
    Definition Classes
    PropositionalLogic
  15. trait VarExtractor extends AnyRef
    Definition Classes
    PropositionalLogic
  16. case class ConstructorExample(cls: Global.Symbol, ctorArgs: List[CounterExample]) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  17. class CounterExample extends AnyRef
    Definition Classes
    MatchAnalyzer
  18. case class ListExample(ctorArgs: List[CounterExample]) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  19. case class NegativeExample(eqTo: MatchAnalyzer.Const, nonTrivialNonEqualTo: List[MatchAnalyzer.Const]) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  20. case class TupleExample(ctorArgs: List[CounterExample]) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  21. case class TypeExample(c: MatchAnalyzer.Const) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  22. case class ValueExample(c: MatchAnalyzer.ValueConst) extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  23. case class Test(prop: MatchApproximator.Prop, treeMaker: MatchApproximator.TreeMaker) extends Product with Serializable
    Definition Classes
    MatchApproximator
  24. class TreeMakersToProps extends AnyRef
    Definition Classes
    MatchApproximator
  25. trait AbsCodegen extends AnyRef
    Definition Classes
    CodegenCore
  26. trait Casegen extends AbsCodegen
    Definition Classes
    CodegenCore
  27. abstract class CommonCodegen extends AbsCodegen
    Definition Classes
    CodegenCore
  28. class ReusedCondTreeMaker extends TreeMaker
    Definition Classes
    CommonSubconditionElimination
  29. case class ReusingCondTreeMaker(sharedPrefix: List[CommonSubconditionElimination.Test], reusesTest: (CommonSubconditionElimination.Test) => Option[CommonSubconditionElimination.Test], toReused: (CommonSubconditionElimination.TreeMaker) => CommonSubconditionElimination.TreeMaker) extends TreeMaker with Product with Serializable
    Definition Classes
    CommonSubconditionElimination
  30. class RegularSwitchMaker extends SwitchMaker
    Definition Classes
    SwitchEmission
  31. abstract class SwitchMaker extends AnyRef
    Definition Classes
    SwitchEmission
  32. final case class BoundTree(binder: Global.Symbol, tree: Global.Tree) extends Product with Serializable
    Definition Classes
    MatchTranslator
  33. abstract class ExtractorCall extends PatternMatching.ExtractorAlignment
    Definition Classes
    MatchTranslator
  34. class ExtractorCallProd extends ExtractorCall
    Definition Classes
    MatchTranslator
  35. class ExtractorCallRegular extends ExtractorCall

    Definition Classes
    MatchTranslator
  36. final case class TranslationStep(makers: List[MatchTranslator.TreeMaker], subpatterns: List[BoundTree]) extends Product with Serializable
    Definition Classes
    MatchTranslator
  37. case class AlternativesTreeMaker(prevBinder: Global.Symbol, altss: List[List[TreeMaker]], pos: Global.Position) extends TreeMaker with NoNewBinders with Product with Serializable
    Definition Classes
    TreeMakers
  38. case class BodyTreeMaker(body: Global.Tree, matchPt: Global.Type) extends TreeMaker with NoNewBinders with Product with Serializable
    Definition Classes
    TreeMakers
  39. sealed abstract class CondTreeMaker extends FunTreeMaker
    Definition Classes
    TreeMakers
  40. case class EqualityTestTreeMaker(prevBinder: Global.Symbol, patTree: Global.Tree, pos: Global.Position) extends CondTreeMaker with Product with Serializable
    Definition Classes
    TreeMakers
  41. 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 binder nextBinder over our extractor's result the function's body is determined by the next TreeMaker (furthermore, the interpretation of flatMap 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 binder nextBinder over our extractor's result the function's body is determined by the next TreeMaker (furthermore, the interpretation of flatMap 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 in subPatBinders. This makes extractor patterns more debuggable (scala/bug#5739).

    Definition Classes
    TreeMakers
  42. sealed abstract class FunTreeMaker extends TreeMaker
    Definition Classes
    TreeMakers
  43. case class GuardTreeMaker(guardTree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable
    Definition Classes
    TreeMakers
  44. sealed trait NoNewBinders extends TreeMaker
    Definition Classes
    TreeMakers
  45. case class NonNullTestTreeMaker(prevBinder: Global.Symbol, expectedTp: Global.Type, pos: Global.Position) extends FunTreeMaker with Product with Serializable

    Make a TreeMaker that performs null check.

    Make a TreeMaker that performs null check. This is called prior to extractor call.

    Definition Classes
    TreeMakers
  46. sealed trait PreserveSubPatBinders extends TreeMaker
    Definition Classes
    TreeMakers
  47. case class ProductExtractorTreeMaker(prevBinder: Global.Symbol, extraCond: Option[Global.Tree])(subPatBinders: List[Global.Symbol], subPatRefs: List[Global.Tree], mutableBinders: List[Global.Symbol], 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 (scala/bug#5739) as well as avoiding mutation after the pattern has been matched (scala/bug#5158, scala/bug#6070)

    TODO: make this user-definable as follows When a companion object defines a method def unapply_1(x: T): U_1, but no def unapply or def 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 are def unapply_I(x: T): U_I methods, and the type of the I'th sub-pattern is U_I. The same exception for Seq patterns applies: if the last extractor is of type Seq[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
  48. case class SubstOnlyTreeMaker(prevBinder: Global.Symbol, nextBinder: Global.Symbol) extends TreeMaker with Product with Serializable
    Definition Classes
    TreeMakers
  49. abstract class TreeMaker extends AnyRef
    Definition Classes
    TreeMakers
  50. case class TrivialTreeMaker(tree: Global.Tree) extends TreeMaker with NoNewBinders with Product with Serializable
    Definition Classes
    TreeMakers
  51. 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://github.com/scala/bug/issues/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
  52. type Clause = Set[Lit]
    Definition Classes
    CNF
  53. type Cnf = Array[Clause]

    Conjunctive normal form (of a Boolean formula).

    Conjunctive normal form (of a Boolean formula). A formula in this form is amenable to a SAT solver (i.e., solver that decides satisfiability of a formula).

    Definition Classes
    CNF
  54. type Model = Map[Sym, Boolean]
    Definition Classes
    PropositionalLogic
  55. type Tree = Global.Tree
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  56. type TseitinModel = collection.immutable.List[Lit]
    Definition Classes
    Solver
  57. type TseitinSearch = collection.immutable.List[(Array[Clause], List[Lit])]
    Definition Classes
    Solver
  58. type Type = Global.Type
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  59. type VarAssignment = Map[Var, (Seq[Const], Seq[Const])]
    Definition Classes
    MatchAnalyzer
  60. sealed abstract class Const extends AnyRef
    Definition Classes
    TreesAndTypesDomain
  61. sealed class TypeConst extends Const
    Definition Classes
    TreesAndTypesDomain
  62. sealed class ValueConst extends Const
    Definition Classes
    TreesAndTypesDomain
  63. class Var extends AbsVar
    Definition Classes
    TreesAndTypesDomain
  64. class AlreadyInCNF extends AnyRef
    Definition Classes
    CNF
  65. trait CnfBuilder extends AnyRef
    Definition Classes
    CNF
  66. trait LitApi extends AnyRef
    Definition Classes
    CNF
  67. trait LitModule extends AnyRef
    Definition Classes
    CNF
  68. final case class Solvable(cnf: Cnf, symbolMapping: SymbolMapping) extends Product with Serializable
    Definition Classes
    CNF
  69. class SymbolMapping extends AnyRef
    Definition Classes
    CNF
  70. class TransformToCnf extends CnfBuilder

    Plaisted transformation: used for conversion of a propositional formula into conjunctive normal form (CNF) (input format for SAT solver).

    Plaisted transformation: used for conversion of a propositional formula into conjunctive normal form (CNF) (input format for SAT solver). A simple conversion into CNF via Shannon expansion would also be possible but it's worst-case complexity is exponential (in the number of variables) and thus even simple problems could become untractable. The Plaisted transformation results in an _equisatisfiable_ CNF-formula (it generates auxiliary variables) but runs with linear complexity. The common known Tseitin transformation uses bi-implication, whereas the Plaisted transformation uses implication only, thus the resulting CNF formula has (on average) only half of the clauses of a Tseitin transformation. The Plaisted transformation uses the polarities of sub-expressions to figure out which part of the bi-implication can be omitted. However, if all sub-expressions have positive polarity (e.g., after transformation into negation normal form) then the conversion is rather simple and the pseudo-normalization via NNF increases chances only one side of the bi-implication is needed.

    Definition Classes
    CNF
  71. case class Lit(v: Int) extends LitApi with Product with Serializable
    Definition Classes
    Solver

Value Members

  1. object EmptySubstitution extends Substitution
    Definition Classes
    TypedSubstitution
  2. object Substitution
    Definition Classes
    TypedSubstitution
  3. object AnalysisBudget
    Definition Classes
    PropositionalLogic
  4. object And extends java.io.Serializable
    Definition Classes
    PropositionalLogic
  5. case object False extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  6. object Or extends java.io.Serializable
    Definition Classes
    PropositionalLogic
  7. object Sym
    Definition Classes
    PropositionalLogic
  8. case object True extends Prop with Product with Serializable
    Definition Classes
    PropositionalLogic
  9. object CounterExample
    Definition Classes
    MatchAnalyzer
  10. case object NoExample extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  11. case object WildcardExample extends CounterExample with Product with Serializable
    Definition Classes
    MatchAnalyzer
  12. object Test extends java.io.Serializable
    Definition Classes
    MatchApproximator
  13. object optimizedCodegen extends CommonCodegen
    Definition Classes
    OptimizedCodegen
  14. object ReusedCondTreeMaker
    Definition Classes
    CommonSubconditionElimination
  15. object ExtractorCall
    Definition Classes
    MatchTranslator
  16. object PatternBoundToUnderscore
    Definition Classes
    MatchTranslator
  17. object SymbolBound
    Definition Classes
    MatchTranslator
  18. object WildcardPattern

    A conservative approximation of which patterns do not discern anything.

    A conservative approximation of which patterns do not discern anything. They are discarded during the translation.

    Definition Classes
    MatchTranslator
  19. object TypeTestTreeMaker extends java.io.Serializable
    Definition Classes
    TreeMakers
  20. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  21. final def ##: Int
    Definition Classes
    AnyRef → Any
  22. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toany2stringadd[OptimizingMatchTranslator] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  23. def ->[B](y: B): (OptimizingMatchTranslator, B)
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toArrowAssoc[OptimizingMatchTranslator] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  24. def /\(props: Iterable[Prop]): Prop
    Definition Classes
    PropositionalLogic
  25. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  26. val ArrayOfFalse: Array[Clause]
    Definition Classes
    CNF
  27. val EmptyModel: Map[Sym, Boolean]
    Definition Classes
    Solver → PropositionalLogic
  28. val NoClauses: Array[Clause]
    Definition Classes
    CNF
  29. val NoModel: Model
    Definition Classes
    Solver → PropositionalLogic
  30. val NoTseitinModel: TseitinModel
    Definition Classes
    Solver
  31. def \/(props: Iterable[Prop]): Prop
    Definition Classes
    PropositionalLogic
  32. def analyzeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Type, suppression: PatternMatching.Suppression): Unit
    Definition Classes
    MatchAnalyzer → TreeMakers
  33. def approximateMatchConservative(root: Global.Symbol, cases: List[List[TreeMaker]]): List[List[Test]]
    Definition Classes
    MatchApproximator
  34. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  35. final def caseWithoutBodyToProp(tests: List[Test]): Prop
    Attributes
    protected
    Definition Classes
    MatchApproximator
  36. def checkMatchVariablePatterns(cases: List[Global.CaseDef]): Unit
    Definition Classes
    TreeMakerWarnings
  37. def checkableType(tp: Global.Type): Global.Type
    Definition Classes
    CheckableTreeAndTypeAnalysis
  38. def clause(ls: IterableOnce[Lit]): Clause
    Definition Classes
    CNF
  39. def clause(l: Lit, l2: Lit, ls: Lit*): Clause
    Definition Classes
    CNF
  40. def clause(l: Lit, l2: Lit): Clause
    Definition Classes
    CNF
  41. def clause(l: Lit): Clause
    Definition Classes
    CNF
  42. def clause(): Clause
    Definition Classes
    CNF
  43. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  44. def cnfString(f: Array[Clause]): String
    Definition Classes
    Solver → CNF
  45. def codegen: AbsCodegen
    Definition Classes
    OptimizedCodegen → CodegenCore
  46. def combineCases(scrut: Global.Tree, scrutSym: Global.Symbol, cases: List[List[TreeMaker]], pt: Global.Type, selectorPos: Global.Position, owner: Global.Symbol, matchFailGenOverride: Option[(Global.Tree) => Global.Tree], suppression: PatternMatching.Suppression): Global.Tree
    Definition Classes
    TreeMakers
  47. def combineExtractors(treeMakers: List[TreeMaker])(casegen: Casegen): Global.Tree
    Definition Classes
    TreeMakers
  48. val debugInfoEmitVars: Boolean
    Attributes
    protected
    Definition Classes
    TreeMakers
  49. def doCSE(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Type, selectorPos: Global.Position): List[List[TreeMaker]]

    a flow-sensitive, generalised, common sub-expression elimination reuse knowledge from performed tests the only sub-expressions we consider are the conditions and results of the three tests (type, type&equality, equality) when a sub-expression is shared, it is stored in a mutable variable the variable is floated up so that its scope includes all of the program that shares it we generalize sharing to implication, where b reuses a if a => b and priors(a) => priors(b) (the priors of a sub expression form the path through the decision tree)

    a flow-sensitive, generalised, common sub-expression elimination reuse knowledge from performed tests the only sub-expressions we consider are the conditions and results of the three tests (type, type&equality, equality) when a sub-expression is shared, it is stored in a mutable variable the variable is floated up so that its scope includes all of the program that shares it we generalize sharing to implication, where b reuses a if a => b and priors(a) => priors(b) (the priors of a sub expression form the path through the decision tree)

    Definition Classes
    CommonSubconditionElimination
  50. 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
  51. def emitTypeSwitch(bindersAndCases: List[(Global.Symbol, List[TreeMaker])], pt: Global.Type): Option[List[Global.CaseDef]]
    Definition Classes
    SwitchEmission → TreeMakers
  52. def ensuring(cond: (OptimizingMatchTranslator) => Boolean, msg: => Any): OptimizingMatchTranslator
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toEnsuring[OptimizingMatchTranslator] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  53. def ensuring(cond: (OptimizingMatchTranslator) => Boolean): OptimizingMatchTranslator
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toEnsuring[OptimizingMatchTranslator] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  54. def ensuring(cond: Boolean, msg: => Any): OptimizingMatchTranslator
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toEnsuring[OptimizingMatchTranslator] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  55. def ensuring(cond: Boolean): OptimizingMatchTranslator
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toEnsuring[OptimizingMatchTranslator] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  56. def enumerateSubtypes(tp: Global.Type, grouped: Boolean): List[List[Global.Type]]
    Definition Classes
    CheckableTreeAndTypeAnalysis
  57. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  58. def eqFreePropToSolvable(p: Prop): Solvable
    Definition Classes
    CNF → PropositionalLogic
  59. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  60. def exhaustive(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Type): List[String]
    Definition Classes
    MatchAnalyzer
  61. def expandModel(solution: Solution): List[VarAssignment]

    The models we get from the DPLL solver need to be mapped back to counter examples.

    The models we get from the DPLL solver need to be mapped back to counter examples. However there's no precalculated mapping model -> counter example. Even worse, not every valid model corresponds to a valid counter example. The reason is that restricting the valid models further would for example require a quadratic number of additional clauses. So to keep the optimistic case fast (i.e., all cases are covered in a pattern match), the infeasible counter examples are filtered later.

    The DPLL procedure keeps the literals that do not contribute to the solution unassigned, e.g., for (a \/ b) only {a = true} or {b = true} is required and the other variable can have any value.

    This function does a smart expansion of the model and avoids models that have conflicting mappings.

    For example for in case of the given set of symbols (taken from t7020.scala): "V2=2#16" "V2=6#19" "V2=5#18" "V2=4#17" "V2=7#20"

    One possibility would be to group the symbols by domain but this would only work for equality tests and would not be compatible with type tests. Another observation leads to a much simpler algorithm: Only one of these symbols can be set to true, since V2 can at most be equal to one of {2,6,5,4,7}.

    Definition Classes
    MatchAnalyzer
  62. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  63. def findAllModelsFor(solvable: Solvable, owner: Global.Symbol): List[Solution]
    Definition Classes
    Solver → PropositionalLogic
  64. def findTseitinModelFor(clauses: Array[Clause]): TseitinModel
    Definition Classes
    Solver
  65. def fixerUpper(origOwner: Global.Symbol, pos: Global.Position): Global.InternalTraverser
    Attributes
    protected
    Definition Classes
    TreeMakers
  66. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toStringFormat[OptimizingMatchTranslator] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  67. def freshName(prefix: String): Global.TermName
    Definition Classes
    CodegenCore
  68. def freshSym(pos: Global.Position, tp: Global.Type = NoType, prefix: String = "x"): Global.TermSymbol
    Definition Classes
    CodegenCore
  69. def gatherSymbols(p: Prop): Set[Sym]
    Definition Classes
    PropositionalLogic
  70. def gatherVariables(p: Prop): Set[Var]
    Definition Classes
    PropositionalLogic
  71. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  72. def getSuppression(scrut: Global.Tree): PatternMatching.Suppression
    Definition Classes
    TreeMakers
  73. def hasModel(solvable: Solvable): Boolean
    Definition Classes
    Solver → PropositionalLogic
  74. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  75. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  76. val matchOwner: Global.Symbol
    Definition Classes
    MatchMonadInterface
  77. def modelToCounterExample(scrutVar: Var)(varAssignment: VarAssignment): Option[CounterExample]
    Definition Classes
    MatchAnalyzer
  78. def modelToVarAssignment(model: Model): VarAssignment
    Definition Classes
    MatchAnalyzer
  79. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  80. def newSynthCaseLabel(name: String): Global.MethodSymbol
    Definition Classes
    CodegenCore
  81. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  82. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  83. def optimizeCases(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Type, selectorPos: Global.Position): (List[List[TreeMaker]], List[Tree])
    Definition Classes
    MatchOptimizer → TreeMakers
  84. def prepareNewAnalysis(): Unit
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  85. def propToSolvable(p: Prop): Solvable
    Definition Classes
    PropositionalLogic
  86. def propagateSubstitution(treeMakers: List[TreeMaker], initial: Substitution): List[TreeMaker]
    Definition Classes
    TreeMakers
  87. def removeSubstOnly(makers: List[TreeMaker]): collection.immutable.List[TreeMaker]
    Definition Classes
    TreeMakers
  88. def removeVarEq(props: List[Prop], modelNull: Boolean = false): (Prop, List[Prop])
    Definition Classes
    PropositionalLogic
  89. def reportMissingCases(pos: Global.Position, counterExamples: List[String]): Unit
    Definition Classes
    MatchMonadInterface
  90. def reportUnreachable(pos: Global.Position): Unit
    Definition Classes
    MatchMonadInterface
  91. def reportWarning(message: String): Unit
    Definition Classes
    MatchAnalyzer → PropositionalLogic
  92. def requiresSwitch(scrut: Global.Tree, cases: List[List[TreeMaker]]): Boolean
    Definition Classes
    TreeMakers
  93. val selectorPos: Global.Position
    Definition Classes
    OptimizingMatchTranslator → MatchTranslator
  94. def showTreeMakers(cases: List[List[TreeMaker]]): Unit
    Definition Classes
    MatchApproximator
  95. def simplify(f: Prop): Prop

    Simplifies propositional formula according to the following rules: - eliminate double negation (avoids unnecessary Tseitin variables) - flatten trees of same connectives (avoids unnecessary Tseitin variables) - removes constants and connectives that are in fact constant because of their operands - eliminates duplicate operands - convert formula into NNF: all sub-expressions have a positive polarity which makes them amenable for the subsequent Plaisted transformation and increases chances to figure out that the formula is already in CNF

    Simplifies propositional formula according to the following rules: - eliminate double negation (avoids unnecessary Tseitin variables) - flatten trees of same connectives (avoids unnecessary Tseitin variables) - removes constants and connectives that are in fact constant because of their operands - eliminates duplicate operands - convert formula into NNF: all sub-expressions have a positive polarity which makes them amenable for the subsequent Plaisted transformation and increases chances to figure out that the formula is already in CNF

    Complexity: DFS over formula tree

    See https://www.decision-procedures.org/slides/propositional_logic-2x3.pdf

    Definition Classes
    PropositionalLogic
  96. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  97. def toString(): String
    Definition Classes
    AnyRef → Any
  98. def translateBody(body: Global.Tree, matchPt: Global.Type): TreeMaker
    Definition Classes
    MatchTranslator
  99. def translateCase(scrutSym: Global.Symbol, pt: Global.Type)(caseDef: Global.CaseDef): List[TreeMaker]

    The translation of pat if guard => body has two aspects: 1) the substitution due to the variables bound by patterns 2) the combination of the extractor calls using flatMap.

    The translation of pat if guard => body has two aspects: 1) the substitution due to the variables bound by patterns 2) the combination of the extractor calls using flatMap.

    2) is easy -- it looks like: translatePattern_1.flatMap(translatePattern_2....flatMap(translatePattern_N.flatMap(translateGuard.flatMap((x_i) => success(Xbody(x_i)))))...) this must be right-leaning tree, as can be seen intuitively by considering the scope of bound variables: variables bound by pat_1 must be visible from the function inside the left-most flatMap right up to Xbody all the way on the right 1) is tricky because translatePattern_i determines the shape of translatePattern_i+1: zoom in on translatePattern_1.flatMap(translatePattern_2) for example -- it actually looks more like: translatePattern_1(x_scrut).flatMap((x_1) => {y_i -> x_1._i}translatePattern_2)

    x_1 references the result (inside the monad) of the extractor corresponding to pat_1, this result holds the values for the constructor arguments, which translatePattern_1 has extracted from the object pointed to by x_scrut. The y_i are the symbols bound by pat_1 (in order) in the scope of the remainder of the pattern, and they must thus be replaced by:

    • (for 1-ary unapply) x_1
    • (for n-ary unapply, n > 1) selection of the i'th tuple component of x_1
    • (for unapplySeq) x_1.apply(i)

    in the treemakers,

    Thus, the result type of translatePattern_i's extractor must conform to M[(T_1,..., T_n)].

    Operationally, phase 1) is a foldLeft, since we must consider the depth-first-flattening of the transformed patterns from left to right. For every pattern ast node, it produces a transformed ast and a function that will take care of binding and substitution of the next ast (to the right).

    Definition Classes
    MatchTranslator
  100. def translateGuard(guard: Global.Tree): List[TreeMaker]
    Definition Classes
    MatchTranslator
  101. def translateMatch(match_: Global.Match): Global.Tree

    NOTE: the resulting tree is not type checked, nor are nested pattern matches transformed thus, you must typecheck the result (and that will in turn translate nested matches) this could probably be optimized...

    NOTE: the resulting tree is not type checked, nor are nested pattern matches transformed thus, you must typecheck the result (and that will in turn translate nested matches) this could probably be optimized...

    Definition Classes
    MatchTranslator
  102. def translatePattern(bound: BoundTree): List[TreeMaker]
    Definition Classes
    MatchTranslator
  103. def translateTry(caseDefs: List[Global.CaseDef], pt: Global.Type, pos: Global.Position): List[Global.CaseDef]
    Definition Classes
    MatchTranslator
  104. val typer: (analyzer)#Typer
    Definition Classes
    OptimizingMatchTranslator → CheckableTreeAndTypeAnalysis → MatchMonadInterface
  105. def uncheckableType(tp: Global.Type): Boolean
    Definition Classes
    CheckableTreeAndTypeAnalysis
  106. def uncheckedWarning(pos: Global.Position, msg: String, site: Global.Symbol): Unit
    Definition Classes
    MatchAnalyzer → PropositionalLogic
  107. def unreachableCase(prevBinder: Global.Symbol, cases: List[List[TreeMaker]], pt: Type): Option[Int]
    Definition Classes
    MatchAnalyzer
  108. def unreachableTypeSwitchCase(cases: List[Global.CaseDef]): Option[Global.CaseDef]
    Definition Classes
    SwitchEmission → TreeMakers
  109. def varAssignmentString(varAssignment: VarAssignment): String
    Definition Classes
    MatchAnalyzer
  110. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  111. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  112. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  113. def warn(pos: Global.Position, ex: Logic.PropositionalLogic.AnalysisBudget.Exception, kind: String, site: Global.Symbol): Unit
    Definition Classes
    MatchAnalyzer
  114. object Const
    Definition Classes
    TreesAndTypesDomain
  115. case object NullConst extends Const with Product with Serializable
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  116. object TypeConst extends TypeConstExtractor
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  117. object ValueConst extends ValueConstExtractor
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  118. object Var extends VarExtractor
    Definition Classes
    TreesAndTypesDomain → PropositionalLogic
  119. object Lit extends LitModule with java.io.Serializable
    Definition Classes
    Solver → CNF

Deprecated Value Members

  1. def →[B](y: B): (OptimizingMatchTranslator, B)
    Implicit
    This member is added by an implicit conversion from OptimizingMatchTranslator toArrowAssoc[OptimizingMatchTranslator] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from PatternMatching.Solver

Inherited from PatternMatching.CNF

Inherited from PatternMatching.MatchAnalyzer

Inherited from PatternMatching.MatchOptimizer

Inherited from PatternMatching.CommonSubconditionElimination

Inherited from PatternMatching.MatchApproximator

Inherited from PatternMatching.TreesAndTypesDomain

Inherited from PatternMatching.CheckableTreeAndTypeAnalysis

Inherited from PatternMatching.PropositionalLogic

Inherited from PatternMatching.SwitchEmission

Inherited from PatternMatching.OptimizedCodegen

Inherited from PatternMatching.MatchTranslator

Inherited from PatternMatching.TreeMakerWarnings

Inherited from PatternMatching.TreeMakers

Inherited from PatternMatching.CodegenCore

Inherited from PatternMatching.TypedSubstitution

Inherited from PatternMatching.MatchMonadInterface

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromOptimizingMatchTranslator to any2stringadd[OptimizingMatchTranslator]

Inherited by implicit conversion StringFormat fromOptimizingMatchTranslator to StringFormat[OptimizingMatchTranslator]

Inherited by implicit conversion Ensuring fromOptimizingMatchTranslator to Ensuring[OptimizingMatchTranslator]

Inherited by implicit conversion ArrowAssoc fromOptimizingMatchTranslator to ArrowAssoc[OptimizingMatchTranslator]

Ungrouped