PosFiniteFloat

An AnyVal for finite positive Floats.

Note: a PosFiniteFloat may not equal 0.0. If you want positive number or 0, use PosZFiniteFloat.

Because PosFiniteFloat is an AnyVal it will usually be as efficient as an Float, being boxed only when an Float would have been boxed.

The PosFiniteFloat.apply factory method is implemented in terms of a macro that checks literals for validity at compile time. Calling PosFiniteFloat.apply with a literal Float value will either produce a valid PosFiniteFloat instance at run time or an error at compile time. Here's an example:

scala> import anyvals._
import anyvals._

scala> PosFiniteFloat(42.1fF)
res0: org.scalactic.anyvals.PosFiniteFloat = PosFiniteFloat(42.1f)

scala> PosFiniteFloat(0.0fF)
<console>:14: error: PosFiniteFloat.apply can only be invoked on a finite positive (i > 0.0f && i != Float.PositiveInfinity) floating point literal, like PosFiniteFloat(42.1fF).
              PosFiniteFloat(42.1fF)
                      ^

PosFiniteFloat.apply cannot be used if the value being passed is a variable (i.e., not a literal), because the macro cannot determine the validity of variables at compile time (just literals). If you try to pass a variable to PosFiniteFloat.apply, you'll get a compiler error that suggests you use a different factor method, PosFiniteFloat.from, instead:

scala> val x = 42.1fF
x: Float = 42.1f

scala> PosFiniteFloat(x)
<console>:15: error: PosFiniteFloat.apply can only be invoked on a floating point literal, like PosFiniteFloat(42.1fF). Please use PosFiniteFloat.from instead.
              PosFiniteFloat(x)
                      ^

The PosFiniteFloat.from factory method will inspect the value at runtime and return an Option[PosFiniteFloat]. If the value is valid, PosFiniteFloat.from will return a Some[PosFiniteFloat], else it will return a None. Here's an example:

scala> PosFiniteFloat.from(x)
res3: Option[org.scalactic.anyvals.PosFiniteFloat] = Some(PosFiniteFloat(42.1f))

scala> val y = 0.0fF
y: Float = 0.0f

scala> PosFiniteFloat.from(y)
res4: Option[org.scalactic.anyvals.PosFiniteFloat] = None

The PosFiniteFloat.apply factory method is marked implicit, so that you can pass literal Floats into methods that require PosFiniteFloat, and get the same compile-time checking you get when calling PosFiniteFloat.apply explicitly. Here's an example:

scala> def invert(pos: PosFiniteFloat): Float = Float.MaxValue - pos
invert: (pos: org.scalactic.anyvals.PosFiniteFloat)Float

scala> invert(42.1fF)
res5: Float = 3.4028235E38

scala> invert(Float.MaxValue)
res6: Float = 0.0

scala> invert(0.0fF)
<console>:15: error: PosFiniteFloat.apply can only be invoked on a finite positive (i > 0.0f && i != Float.PositiveInfinity) floating point literal, like PosFiniteFloat(42.1fF).
              invert(0.0F)
                     ^

scala> invert(0.0fF)
<console>:15: error: PosFiniteFloat.apply can only be invoked on a finite positive (i > 0.0f && i != Float.PositiveInfinity) floating point literal, like PosFiniteFloat(42.1fF).
              invert(0.0fF)
                      ^

This example also demonstrates that the PosFiniteFloat companion object also defines implicit widening conversions when no loss of precision will occur. This makes it convenient to use a PosFiniteFloat where a Float or wider type is needed. An example is the subtraction in the body of the invert method defined above, Float.MaxValue - pos. Although Float.MaxValue is a Float, which has no - method that takes a PosFiniteFloat (the type of pos), you can still subtract pos, because the PosFiniteFloat will be implicitly widened to Float.

Source: PosFiniteFloat.scala

Linear Supertypes

AnyVal, Any

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
Any
final def ##(): Int

Definition Classes
Any
def %(x: Double): Double

Returns the remainder of the division of this value by x.
def %(x: Float): Float

Returns the remainder of the division of this value by x.
def %(x: Long): Float

Returns the remainder of the division of this value by x.
def %(x: Int): Float

Returns the remainder of the division of this value by x.
def %(x: Char): Float

Returns the remainder of the division of this value by x.
def %(x: Short): Float

Returns the remainder of the division of this value by x.
def %(x: Byte): Float

Returns the remainder of the division of this value by x.
def *(x: Double): Double

Returns the product of this value and x.
def *(x: Float): Float

Returns the product of this value and x.
def *(x: Long): Float

Returns the product of this value and x.
def *(x: Int): Float

Returns the product of this value and x.
def *(x: Char): Float

Returns the product of this value and x.
def *(x: Short): Float

Returns the product of this value and x.
def *(x: Byte): Float

Returns the product of this value and x.
def +(x: Double): Double

Returns the sum of this value and x.
def +(x: Float): Float

Returns the sum of this value and x.
def +(x: Long): Float

Returns the sum of this value and x.
def +(x: Int): Float

Returns the sum of this value and x.
def +(x: Char): Float

Returns the sum of this value and x.
def +(x: Short): Float

Returns the sum of this value and x.
def +(x: Byte): Float

Returns the sum of this value and x.
def +(x: String): String

Converts this PosFiniteFloat's value to a string then concatenates the given string.
Converts this PosFiniteFloat's value to a string then concatenates the given string.
def -(x: Double): Double

Returns the difference of this value and x.
def -(x: Float): Float

Returns the difference of this value and x.
def -(x: Long): Float

Returns the difference of this value and x.
def -(x: Int): Float

Returns the difference of this value and x.
def -(x: Char): Float

Returns the difference of this value and x.
def -(x: Short): Float

Returns the difference of this value and x.
def -(x: Byte): Float

Returns the difference of this value and x.
def /(x: Double): Double

Returns the quotient of this value and x.
def /(x: Float): Float

Returns the quotient of this value and x.
def /(x: Long): Float

Returns the quotient of this value and x.
def /(x: Int): Float

Returns the quotient of this value and x.
def /(x: Char): Float

Returns the quotient of this value and x.
def /(x: Short): Float

Returns the quotient of this value and x.
def /(x: Byte): Float

Returns the quotient of this value and x.
def <(x: Double): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Float): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Long): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Int): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Char): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Short): Boolean

Returns true if this value is less than x, false otherwise.
def <(x: Byte): Boolean

Returns true if this value is less than x, false otherwise.
def <=(x: Double): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Float): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Long): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Int): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Char): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Short): Boolean

Returns true if this value is less than or equal to x, false otherwise.
def <=(x: Byte): Boolean

Returns true if this value is less than or equal to x, false otherwise.
final def ==(arg0: Any): Boolean

Definition Classes
Any
def >(x: Double): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Float): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Long): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Int): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Char): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Short): Boolean

Returns true if this value is greater than x, false otherwise.
def >(x: Byte): Boolean

Returns true if this value is greater than x, false otherwise.
def >=(x: Double): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Float): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Long): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Int): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Char): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Short): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
def >=(x: Byte): Boolean

Returns true if this value is greater than or equal to x, false otherwise.
final def asInstanceOf[T0]: T0

Definition Classes
Any
def ceil: PosFiniteFloat

Returns the smallest (closest to 0) PosFiniteFloat that is greater than or equal to this PosFiniteFloat and represents a mathematical integer.
def ensuringValid(f: (Float) ⇒ Float): PosFiniteFloat

Applies the passed Float => Float function to the underlying Float value, and if the result is positive, returns the result wrapped in a PosFiniteFloat, else throws AssertionError.
Applies the passed Float => Float function to the underlying Float value, and if the result is positive, returns the result wrapped in a PosFiniteFloat, else throws AssertionError.
This method will inspect the result of applying the given function to this PosFiniteFloat's underlying Float value and if the result is finite positive, it will return a PosFiniteFloat representing that value. Otherwise, the Float value returned by the given function is not finite positive, so this method will throw AssertionError.
This method differs from a vanilla assert or ensuring call in that you get something you didn't already have if the assertion succeeds: a type that promises an Float is finite positive. With this method, you are asserting that you are convinced the result of the computation represented by applying the given function to this PosFiniteFloat's value will not produce invalid value. Instead of producing such invalid values, this method will throw AssertionError.
f
the Float => Float function to apply to this PosFiniteFloat's underlying Float value.
returns
the result of applying this PosFiniteFloat's underlying Float value to to the passed function, wrapped in a PosFiniteFloat if it is finite positive (else throws AssertionError).

Exceptions thrown
AssertionError if the result of applying this PosFiniteFloat's underlying Float value to to the passed function is not finite positive.
def floor: PosZFiniteFloat

Returns the greatest (closest to infinity) PosZFiniteFloat that is less than or equal to this PosZFiniteFloat and represents a mathematical integer.
def getClass(): Class[_ <: AnyVal]

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

Definition Classes
Any
def isWhole: Boolean

Indicates whether this PosFiniteFloat has a value that is a whole number: it is finite and it has no fraction part.
def max(that: PosFiniteFloat): PosFiniteFloat

Returns this if this > that or that otherwise.
Returns this if this > that or that otherwise.
def min(that: PosFiniteFloat): PosFiniteFloat

Returns this if this < that or that otherwise.
Returns this if this < that or that otherwise.
def round: PosZInt

Rounds this PosFiniteFloat value to the nearest whole number value that can be expressed as an PosZInt, returning the result as a PosZInt.
def toByte: Byte

Converts this PosFiniteFloat to a Byte.
Converts this PosFiniteFloat to a Byte.
def toChar: Char

Converts this PosFiniteFloat to a Char.
Converts this PosFiniteFloat to a Char.
def toDegrees: Float

Converts an angle measured in radians to an approximately equivalent angle measured in degrees.
Converts an angle measured in radians to an approximately equivalent angle measured in degrees.
returns
the measurement of the angle x in degrees.
def toDouble: Double

Converts this PosFiniteFloat to a Double.
Converts this PosFiniteFloat to a Double.
def toFloat: Float

Converts this PosFiniteFloat to a Float.
Converts this PosFiniteFloat to a Float.
def toInt: Int

Converts this PosFiniteFloat to an Int.
Converts this PosFiniteFloat to an Int.
def toLong: Long

Converts this PosFiniteFloat to a Long.
Converts this PosFiniteFloat to a Long.
def toRadians: Float

Converts an angle measured in degrees to an approximately equivalent angle measured in radians.
Converts an angle measured in degrees to an approximately equivalent angle measured in radians.
returns
the measurement of the angle x in radians.
def toShort: Short

Converts this PosFiniteFloat to a Short.
Converts this PosFiniteFloat to a Short.
def toString(): String

A string representation of this PosFiniteFloat.
A string representation of this PosFiniteFloat.

Definition Classes
PosFiniteFloat → Any
def unary_+: PosFiniteFloat

Returns this value, unmodified.
def unary_-: NegFiniteFloat

Returns the negation of this value.
val value: Float

The Float value underlying this PosFiniteFloat.
The Float value underlying this PosFiniteFloat.

Related Docs: object PosFiniteFloat | package anyvals

final class PosFiniteFloat extends AnyVal

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

def %(x: Double): Double

def %(x: Float): Float

def %(x: Long): Float

def %(x: Int): Float

def %(x: Char): Float

def %(x: Short): Float

def %(x: Byte): Float

def *(x: Double): Double

def *(x: Float): Float

def *(x: Long): Float

def *(x: Int): Float

def *(x: Char): Float

def *(x: Short): Float

def *(x: Byte): Float

def +(x: Double): Double

def +(x: Float): Float

def +(x: Long): Float

def +(x: Int): Float

def +(x: Char): Float

def +(x: Short): Float

def +(x: Byte): Float

def +(x: String): String

def -(x: Double): Double

def -(x: Float): Float

def -(x: Long): Float

def -(x: Int): Float

def -(x: Char): Float

def -(x: Short): Float

def -(x: Byte): Float

def /(x: Double): Double

def /(x: Float): Float

def /(x: Long): Float

def /(x: Int): Float

def /(x: Char): Float

def /(x: Short): Float

def /(x: Byte): Float

def <(x: Double): Boolean

def <(x: Float): Boolean

def <(x: Long): Boolean

def <(x: Int): Boolean

def <(x: Char): Boolean

def <(x: Short): Boolean

def <(x: Byte): Boolean

def <=(x: Double): Boolean

def <=(x: Float): Boolean

def <=(x: Long): Boolean

def <=(x: Int): Boolean

def <=(x: Char): Boolean

def <=(x: Short): Boolean

def <=(x: Byte): Boolean

final def ==(arg0: Any): Boolean

def >(x: Double): Boolean

def >(x: Float): Boolean

def >(x: Long): Boolean

def >(x: Int): Boolean

def >(x: Char): Boolean

def >(x: Short): Boolean

def >(x: Byte): Boolean

def >=(x: Double): Boolean

def >=(x: Float): Boolean

def >=(x: Long): Boolean

def >=(x: Int): Boolean

def >=(x: Char): Boolean

def >=(x: Short): Boolean

def >=(x: Byte): Boolean

final def asInstanceOf[T0]: T0

def ceil: PosFiniteFloat

def ensuringValid(f: (Float) ⇒ Float): PosFiniteFloat

def floor: PosZFiniteFloat

def getClass(): Class[_ <: AnyVal]

final def isInstanceOf[T0]: Boolean

def isWhole: Boolean

def max(that: PosFiniteFloat): PosFiniteFloat

def min(that: PosFiniteFloat): PosFiniteFloat