org.scalautils

LowPriorityConversionCheckedConstraint

trait LowPriorityConversionCheckedConstraint extends EqualityConstraints

Provides an implicit conversion that will be applied only if a higher-priority implicit conversion declared a subtrait is not applicable.

The purpose of this trait is to make the === operator symetric. In other words, a === invocation will be allowed if an implicit conversion exists in either direction. For example, the implicit widening conversion from Int to Long will be applied on the left hand side in this expression:

1 === 1L

But in the next expression, it will be applied on the right hand side:

1L === 1

The first expression above is enabled by the implicit conversion conversionCheckedEqualityConstraint in traits ConversionCheckedTripleEquals and ConversionCheckedLegacyTripleEquals. The second expression above is enabled by the implicit conversion lowPriorityConversionCheckedEqualityConstraint in this trait.

The reason these two implicit methods aren't both declared in the subtraits is that if implicit conversions were available in both directions, they would conflict. By placing one of them in this supertrait, the higher priority conversion will be selected.

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EqualityConstraints, AnyRef, Any
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  1. LowPriorityConversionCheckedConstraint
  2. EqualityConstraints
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Abstract Value Members

  1. def conversionCheckedEqualityConstraint [A, B] (implicit equalityOfA: Equality[A], cnv: (B) ⇒ A): EqualityConstraint[A, B]

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that B is implicitly convertible to A, given an implicit Equality[A].

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that B is implicitly convertible to A, given an implicit Equality[A].

    The implicitly passed Equality[A] must be used to determine equality by the returned EqualityConstraint's areEqual method.

    This method is overridden and made implicit by subtraits ConversionCheckedTripleEquals) and ConversionCheckedLegacyTripleEquals, and overriden as non-implicit by the other subtraits in this package.

    equalityOfA

    an Equality[A] type class to which the EqualityConstraint.areEqual method will delegate to determine equality.

    cnv

    an implicit conversion from B to A

    returns

    an EqualityConstraint[A, B] whose areEqual method delegates to the areEqual method of the passed Equality[A].

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  2. def convertToCheckingEqualizer [T] (left: T): CheckingEqualizer[T]

    Convert to an CheckingEqualizer that provides === and !== operators that result in Boolean and enforce a type constraint.

    Convert to an CheckingEqualizer that provides === and !== operators that result in Boolean and enforce a type constraint.

    This method is overridden and made implicit by subtraits TypeCheckedTripleEquals and ConversionCheckedTripleEquals, and overriden as non-implicit by the other subtraits in this package.

    left

    the object whose type to convert to CheckingEqualizer.

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  3. def convertToEqualizer [T] (left: T): Equalizer[T]

    Convert to an Equalizer that provides === and !== operators that result in Boolean and enforce no type constraint.

    Convert to an Equalizer that provides === and !== operators that result in Boolean and enforce no type constraint.

    This method is overridden and made implicit by subtrait TripleEquals and overriden as non-implicit by the other subtraits in this package.

    left

    the object whose type to convert to Equalizer.

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  4. def convertToLegacyCheckingEqualizer [T] (left: T): LegacyCheckingEqualizer[T]

    Convert to a LegacyCheckingEqualizer that provides === and !== operators that result in Option[String] and enforce a type constraint.

    Convert to a LegacyCheckingEqualizer that provides === and !== operators that result in Option[String] and enforce a type constraint.

    This method is overridden and made implicit by subtraits TypeCheckedLegacyTripleEquals and ConversionCheckedLegacyTripleEquals, and overriden as non-implicit by the other subtraits in this package.

    left

    the object whose type to convert to LegacyCheckingEqualizer.

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  5. def convertToLegacyEqualizer [T] (left: T): LegacyEqualizer[T]

    Convert to a LegacyEqualizer that provides === and !== operators that result in Option[String] and enforce no type constraint.

    Convert to a LegacyEqualizer that provides === and !== operators that result in Option[String] and enforce no type constraint.

    This method is overridden and made implicit by subtrait LegacyTripleEquals and overriden as non-implicit by the other subtraits in this package.

    left

    the object whose type to convert to LegacyEqualizer.

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  6. def defaultEquality [A] : Equality[A]

    Return an Equality[A] for any type A that determines equality via the == operator on type A.

    Return an Equality[A] for any type A that determines equality via the == operator on type A.

    returns

    a DefaultEquality for type A

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  7. def lowPriorityTypeCheckedEqualityConstraint [A, B] (implicit equalityOfA: Equality[A], ev: <:<[A, B]): EqualityConstraint[A, B]

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an implicit Equality[A].

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an implicit Equality[A].

    The implicitly passed Equality[A] must be used to determine equality by the returned EqualityConstraint's areEqual method.

    This method is overridden and made implicit by subtraits LowPriorityTypeCheckedConstraint (extended by TypeCheckedTripleEquals), and LowPriorityTypeCheckedLegacyConstraint (extended by TypeCheckedLegacyTripleEquals), and overriden as non-implicit by the other subtraits in this package.

    equalityOfA

    an Equality[A] type class to which the EqualityConstraint.areEqual method will delegate to determine equality.

    ev

    evidence that A is a subype of B

    returns

    an EqualityConstraint[A, B] whose areEqual method delegates to the areEqual method of the passed Equality[A].

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  8. def typeCheckedEqualityConstraint [A, B] (implicit equalityOfA: Equality[A], ev: <:<[B, A]): EqualityConstraint[A, B]

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an implicit Equality[A].

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an implicit Equality[A].

    The implicitly passed Equality[A] must be used to determine equality by the returned EqualityConstraint's areEqual method.

    This method is overridden and made implicit by subtraits TypeCheckedTripleEquals) and TypeCheckedLegacyTripleEquals, and overriden as non-implicit by the other subtraits in this package.

    equalityOfA

    an Equality[A] type class to which the EqualityConstraint.areEqual method will delegate to determine equality.

    ev

    evidence that B is a subype of A

    returns

    an EqualityConstraint[A, B] whose areEqual method delegates to the areEqual method of the passed Equality[A].

    Attributes
    abstract
    Definition Classes
    EqualityConstraints
  9. def unconstrainedEquality [A, B] (implicit equalityOfA: Equality[A]): EqualityConstraint[A, B]

    Provides an EqualityConstraint[A, B] class for any two types A and B, with no type constraint enforced, given an implicit Equality[A].

    Provides an EqualityConstraint[A, B] class for any two types A and B, with no type constraint enforced, given an implicit Equality[A].

    The implicitly passed Equality[A] must be used to determine equality by the returned EqualityConstraint's areEqual method.

    This method is overridden and made implicit by subtraits TripleEquals and LegacyTripleEquals, and overriden as non-implicit by the other subtraits in this package.

    equalityOfA

    an Equality[A] type class to which the EqualityConstraint.areEqual method will delegate to determine equality.

    returns

    an EqualityConstraint[A, B] whose areEqual method delegates to the areEqual method of the passed Equality[A].

    Attributes
    abstract
    Definition Classes
    EqualityConstraints

Concrete Value Members

  1. def != (arg0: AnyRef): Boolean

    Attributes
    final
    Definition Classes
    AnyRef
  2. def != (arg0: Any): Boolean

    Attributes
    final
    Definition Classes
    Any
  3. def !== [T] (right: Interval[T]): TripleEqualsInvocationOnInterval[T]

    Returns a TripleEqualsInvocationOnInterval[T], given an Interval[T], to facilitate the “<left> should !== (<pivot> +- <tolerance>)” syntax of Matchers.

    Returns a TripleEqualsInvocationOnInterval[T], given an Interval[T], to facilitate the “<left> should !== (<pivot> +- <tolerance>)” syntax of Matchers.

    right

    the Interval[T] against which to compare the left-hand value

    returns

    a TripleEqualsInvocationOnInterval wrapping the passed Interval[T] value, with expectingEqual set to false.

    Definition Classes
    EqualityConstraints
  4. def !== (right: Null): TripleEqualsInvocation[Null]

    Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should !== null” syntax of Matchers.

    Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should !== null” syntax of Matchers.

    right

    a null reference

    returns

    a TripleEqualsInvocation wrapping the passed null value, with expectingEqual set to false.

    Definition Classes
    EqualityConstraints
  5. def !== [T] (right: T): TripleEqualsInvocation[T]

    Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should !== <right>” syntax of Matchers.

    Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should !== <right>” syntax of Matchers.

    right

    the right-hand side value for an equality assertion

    returns

    a TripleEqualsInvocation wrapping the passed right value, with expectingEqual set to false.

    Definition Classes
    EqualityConstraints
  6. def ## (): Int

    Attributes
    final
    Definition Classes
    AnyRef → Any
  7. def == (arg0: AnyRef): Boolean

    Attributes
    final
    Definition Classes
    AnyRef
  8. def == (arg0: Any): Boolean

    Attributes
    final
    Definition Classes
    Any
  9. def === [T] (right: Interval[T]): TripleEqualsInvocationOnInterval[T]

    Returns a TripleEqualsInvocationOnInterval[T], given an Interval[T], to facilitate the “<left> should === (<pivot> +- <tolerance>)” syntax of Matchers.

    Returns a TripleEqualsInvocationOnInterval[T], given an Interval[T], to facilitate the “<left> should === (<pivot> +- <tolerance>)” syntax of Matchers.

    right

    the Interval[T] against which to compare the left-hand value

    returns

    a TripleEqualsInvocationOnInterval wrapping the passed Interval[T] value, with expectingEqual set to true.

    Definition Classes
    EqualityConstraints
  10. def === (right: Null): TripleEqualsInvocation[Null]

    Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should === null” syntax of Matchers.

    Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should === null” syntax of Matchers.

    right

    a null reference

    returns

    a TripleEqualsInvocation wrapping the passed null value, with expectingEqual set to true.

    Definition Classes
    EqualityConstraints
  11. def === [T] (right: T): TripleEqualsInvocation[T]

    Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should === <right>” syntax of Matchers.

    Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should === <right>” syntax of Matchers.

    right

    the right-hand side value for an equality assertion

    returns

    a TripleEqualsInvocation wrapping the passed right value, with expectingEqual set to true.

    Definition Classes
    EqualityConstraints
  12. def asInstanceOf [T0] : T0

    Attributes
    final
    Definition Classes
    Any
  13. def clone (): AnyRef

    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws()
  14. def eq (arg0: AnyRef): Boolean

    Attributes
    final
    Definition Classes
    AnyRef
  15. def equals (arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  16. def finalize (): Unit

    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws()
  17. def getClass (): java.lang.Class[_]

    Attributes
    final
    Definition Classes
    AnyRef → Any
  18. def hashCode (): Int

    Definition Classes
    AnyRef → Any
  19. def isInstanceOf [T0] : Boolean

    Attributes
    final
    Definition Classes
    Any
  20. implicit def lowPriorityConversionCheckedEqualityConstraint [A, B] (implicit equalityOfB: Equality[B], cnv: (A) ⇒ B): EqualityConstraint[A, B]

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that A is implicitly convertible to B, given an implicit Equality[A].

    Provides an EqualityConstraint[A, B] class for any two types A and B, enforcing the type constraint that A is implicitly convertible to B, given an implicit Equality[A].

    The implicitly passed Equality[A] must be used to determine equality by the returned EqualityConstraint's areEqual method.

    This method is overridden and made implicit by subtraits LowPriorityConversionCheckedConstraint (extended by ConversionCheckedTripleEquals), and LowPriorityConversionCheckedLegacyConstraint (extended by ConversionCheckedLegacyTripleEquals), and overriden as non-implicit by the other subtraits in this package.

    cnv

    an implicit conversion from A to B

    returns

    an EqualityConstraint[A, B] whose areEqual method delegates to the areEqual method of the passed Equality[A].

    Attributes
    implicit
    Definition Classes
    LowPriorityConversionCheckedConstraintEqualityConstraints
  21. def ne (arg0: AnyRef): Boolean

    Attributes
    final
    Definition Classes
    AnyRef
  22. def notify (): Unit

    Attributes
    final
    Definition Classes
    AnyRef
  23. def notifyAll (): Unit

    Attributes
    final
    Definition Classes
    AnyRef
  24. def synchronized [T0] (arg0: ⇒ T0): T0

    Attributes
    final
    Definition Classes
    AnyRef
  25. def toString (): String

    Definition Classes
    AnyRef → Any
  26. def wait (): Unit

    Attributes
    final
    Definition Classes
    AnyRef
    Annotations
    @throws()
  27. def wait (arg0: Long, arg1: Int): Unit

    Attributes
    final
    Definition Classes
    AnyRef
    Annotations
    @throws()
  28. def wait (arg0: Long): Unit

    Attributes
    final
    Definition Classes
    AnyRef
    Annotations
    @throws()

Inherited from EqualityConstraints

Inherited from AnyRef

Inherited from Any