TypeCoercion

Provides over 200 coercions between types. This works for the following matrix of types:

                                        TO

            Bo  C   By  Sh  I   L   F   D   JBy JSh JI  JL  JF  JD  JC  JBo St
          +--------------------------------------------------------------------
      Bo  | I                                                           bB  tS
      C   |     I   A   A   A   A   A   A   A   A   A   A   A   A   A       tS
      By  |     A   I   A   A   A   A   A   A   A   A   A   A   A   A       tS
      Sh  |     A   A   I   A   A   A   A   A   A   A   A   A   A   A       tS
      I   |     A   A   A   I   A   A   A   A   A   A   A   A   A   A       tS
      L   |     A   A   A   A   I   A   A   A   A   A   A   A   A   A       tS
 F    F   |     A   A   A   A   A   I   A   A   A   A   A   A   A   A       tS
 R    D   |     A   A   A   A   A   A   I   A   A   A   A   A   A   A       tS
 O    JBy |     N   N   N   N   N   N   N   I   N   N   N   N   N   N       tS
 M    JSh |     N   N   N   N   N   N   N   N   I   N   N   N   N   N       tS
      JI  |     N   N   N   N   N   N   N   N   N   I   N   N   N   N       tS
      JL  |     N   N   N   N   N   N   N   N   N   N   I   N   N   N       tS
      JF  |     N   N   N   N   N   N   N   N   N   N   N   I   N   N       tS
      JD  |     N   N   N   N   N   N   N   N   N   N   N   N   I   N       tS
      JC  |     uC                                                  I       tS
      JBo | uB                                                          I   tS
      St  |                                                                 I

Where the label abbreviations are:

Bo: scala.Boolean
C: scala.Char
By: scala.Byte
Sh: scala.Short
I: scala.Int
L: scala.Long
F: scala.Float
D: scala.Double
JBy: java.lang.Byte
JSh: java.lang.Short
JI: java.lang.Integer
JL: java.lang.Long
JF: java.lang.Float
JD: java.lang.Character
JC: java.lang.Double
JBo: java.lang.Boolean
St: java.lang.String

and value abbreviations are:

A: coercion from scala.AnyVal
N: coercion from java.lang.Number
I: identity function
bB: boxing Boolean coercion
uB: unboxing Boolean coercion
uC: unboxing character coercion
tS: toString coercion

The rationale behind not supplying coercion from Strings is that too many exceptions can be thrown during the coercion process. Coercions from String to character have issues with the empty string. One could call one of the following but they all throw exceptions:

"".charAt(0) // java.lang.StringIndexOutOfBoundsException: String index out of range: 0
"".apply(0)  // java.lang.StringIndexOutOfBoundsException: String index out of range: 0
"".head      // java.util.NoSuchElementException: next on empty iterator

Conversion to Boolean from Numbers and vice versa is not supported because there are a number of ways to do this:

Non-zero numbers are true, 0 is false.
One is true, all else is false

Self Type: TypeCoercion with Logging

Linear Supertypes

AnyRef, Any

Known Subclasses

TypeCoercion

Value Members

final def !=(arg0: AnyRef): Boolean

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

Definition Classes
Any
final def ##(): Int

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

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

Definition Classes
Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
def coercion[A, B](implicit a: RefInfo[A], b: RefInfo[B]): Option[(A) ⇒ B]
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

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

Definition Classes
AnyRef → Any
def hashCode(): Int

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

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

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

Definition Classes
AnyRef
def toString(): String

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( ... )

trait TypeCoercion extends AnyRef

Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def coercion[A, B](implicit a: RefInfo[A], b: RefInfo[B]): Option[(A) ⇒ B]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from AnyRef

Inherited from Any

Ungrouped