Scala Compiler2.12.21 < Back
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# Packages

-  package root

  The Scala compiler and reflection APIs.

  The Scala compiler and reflection APIs.

  Definition Classes
    root
-  package scala
  Definition Classes
    root
-  package tools
  Definition Classes
    scala
-  package cmd
  Definition Classes
    tools
- CommandLine
- CommandLineConfig
- CommandLineParser
- FromString
- Instance
- Interpolation
- Meta
- Opt
- Property
- PropertyMapper
- Reference
- Spec

c

scala.tools.cmd

# FromString 

###
Companion object FromString

#### abstract class FromString[+T] extends PartialFunction[String, T]

A general mechanism for defining how a command line argument (always a String) is transformed into an arbitrary type. A few example instances are in the companion object, but in general either IntFromString will suffice or you'll want custom transformers.

Source
  FromString.scala

Linear Supertypes
PartialFunction[String, T], (String) ⇒ T, AnyRef, Any
 
Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. FromString
2. PartialFunction
3. Function1
4. AnyRef
5. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

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Visibility

1. Public
2. All

### Instance Constructors

1.  new FromString()(implicit m: OptManifest[T])

### Abstract Value Members

1.  abstract def apply(s: String): T
   Definition Classes
     FromString → Function1

### Concrete Value Members

1.  final def !=(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
2.  final def ##(): Int
   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from FromString[T] to any2stringadd[FromString[T]] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (FromString[T], B)
   Implicit
     This member is added by an implicit conversion from FromString[T] to ArrowAssoc[FromString[T]] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  def andThen[C](k: (T) ⇒ C): PartialFunction[String, C]
   Definition Classes
     PartialFunction → Function1
7.  def applyOrElse[A1 <: String, B1 >: T](x: A1, default: (A1) ⇒ B1): B1
   Definition Classes
     PartialFunction
8.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
9.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... ) @native()
10.  def compose[A](g: (A) ⇒ String): (A) ⇒ T
    Definition Classes
      Function1
    Annotations
      @unspecialized()
11.  def ensuring(cond: (FromString[T]) ⇒ Boolean, msg: ⇒ Any): FromString[T]
    Implicit
      This member is added by an implicit conversion from FromString[T] to Ensuring[FromString[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  def ensuring(cond: (FromString[T]) ⇒ Boolean): FromString[T]
    Implicit
      This member is added by an implicit conversion from FromString[T] to Ensuring[FromString[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
13.  def ensuring(cond: Boolean, msg: ⇒ Any): FromString[T]
    Implicit
      This member is added by an implicit conversion from FromString[T] to Ensuring[FromString[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
14.  def ensuring(cond: Boolean): FromString[T]
    Implicit
      This member is added by an implicit conversion from FromString[T] to Ensuring[FromString[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
15.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
16.  def equals(arg0: Any): Boolean
    Definition Classes
      AnyRef → Any
17.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
18.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
19.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
20.  def isDefinedAt(s: String): Boolean
    Definition Classes
      FromString → PartialFunction
21.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
22.  def lift: (String) ⇒ Option[T]
    Definition Classes
      PartialFunction
23.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
24.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
25.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
26.  def orElse[A1 <: String, B1 >: T](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]
    Definition Classes
      PartialFunction
27.  def runWith[U](action: (T) ⇒ U): (String) ⇒ Boolean
    Definition Classes
      PartialFunction
28.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
29.  def targetString: String
30.  def toString(): String
    Definition Classes
      Function1 → AnyRef → Any
31.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
32.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
33.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... ) @native()
34.  def zero: T
35.  def →[B](y: B): (FromString[T], B)
    Implicit
      This member is added by an implicit conversion from FromString[T] to ArrowAssoc[FromString[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from FromString[T] to StringFormat[FromString[T]] performed by method StringFormat in scala.Predef.
   Definition Classes
     StringFormat
   Annotations
     @deprecated @inline()
   Deprecated

     (Since version 2.12.16) Use `formatString.format(value)` instead of `value.formatted(formatString)`, or use the `f""` string interpolator. In Java 15 and later, `formatted` resolves to the new method in String which has reversed parameters.

### Inherited from PartialFunction[String, T]

### Inherited from (String) ⇒ T

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from FromString[T] to any2stringadd[FromString[T]]

### Inherited by implicit conversion StringFormat from FromString[T] to StringFormat[FromString[T]]

### Inherited by implicit conversion Ensuring from FromString[T] to Ensuring[FromString[T]]

### Inherited by implicit conversion ArrowAssoc from FromString[T] to ArrowAssoc[FromString[T]]

### Ungrouped