Scala Compiler2.13.17 < 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 nsc
  Definition Classes
    tools
-  package typechecker
  Definition Classes
    nsc
-  trait TypeDiagnostics extends SplainDiagnostics

  An interface to enable higher configurability of diagnostic messages regarding type errors.

  An interface to enable higher configurability of diagnostic messages regarding type errors. This is barely a beginning as error messages are distributed far and wide across the codebase. The plan is to partition error messages into some broad groups and provide some mechanism for being more or less verbose on a selective basis. Possible groups include such examples as

  arity errors kind errors variance errors ambiguity errors volatility/stability errors implementation restrictions

  And more, and there is plenty of overlap, so it'll be a process.

  Definition Classes
    typechecker
- ByNameFormatter
- FunctionFormatter
- ImplicitErrorLink
- ImplicitErrorTree
- Refined
- RefinedFormatter
- SpecialFormatter
- TupleFormatter
- TypeDiag
- TypeParts
- TyperDiagnostics
- UnusedPrivates
- checkDead
- checkUnused

c

scala.tools.nsc.typechecker.TypeDiagnostics

# checkUnused

###

#### class checkUnused extends AnyRef

Source
  TypeDiagnostics.scala

Linear Supertypes
AnyRef, Any
Type Hierarchy

Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. checkUnused
2. AnyRef
3. 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 checkUnused(typer: (TypeDiagnostics.this)#Typer)

### 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 (TypeDiagnostics.this)#checkUnused toany2stringadd[(TypeDiagnostics.this)#checkUnused] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): ((TypeDiagnostics.this)#checkUnused, B)
   Implicit
     This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toArrowAssoc[(TypeDiagnostics.this)#checkUnused] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  def apply(unit: Global.CompilationUnit): Unit
7.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
8.  def clone(): AnyRef
   Attributes
     protected[lang]
   Definition Classes
     AnyRef
   Annotations
     @throws(classOf[java.lang.CloneNotSupportedException]) @native()
9.  def ensuring(cond: ((TypeDiagnostics.this)#checkUnused) => Boolean, msg: => Any): (TypeDiagnostics.this)#checkUnused
   Implicit
     This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toEnsuring[(TypeDiagnostics.this)#checkUnused] performed by method Ensuring in scala.Predef.
   Definition Classes
     Ensuring
10.  def ensuring(cond: ((TypeDiagnostics.this)#checkUnused) => Boolean): (TypeDiagnostics.this)#checkUnused
    Implicit
      This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toEnsuring[(TypeDiagnostics.this)#checkUnused] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
11.  def ensuring(cond: Boolean, msg: => Any): (TypeDiagnostics.this)#checkUnused
    Implicit
      This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toEnsuring[(TypeDiagnostics.this)#checkUnused] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
12.  def ensuring(cond: Boolean): (TypeDiagnostics.this)#checkUnused
    Implicit
      This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toEnsuring[(TypeDiagnostics.this)#checkUnused] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
13.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
14.  def equals(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef → Any
15.  def finalize(): Unit
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
16.  final def getClass(): Class[_ <: AnyRef]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
17.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
18.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
19.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
20.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
21.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
22.  def run(unusedPrivates: (TypeDiagnostics.this)#UnusedPrivates)(body: Global.Tree): Unit
23.  final def synchronized[T0](arg0: => T0): T0
    Definition Classes
      AnyRef
24.  def toString(): String
    Definition Classes
      AnyRef → Any
25.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
26.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException])
27.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()
28.  object checkMacroExpandee extends (TypeDiagnostics.this)#UnusedPrivates
29.  object checkMacroExpandeeAndExpandedRefs extends (TypeDiagnostics.this)#UnusedPrivates
30.  object skipMacroCall extends (TypeDiagnostics.this)#UnusedPrivates
31.  object skipMacroExpansion extends (TypeDiagnostics.this)#UnusedPrivates

### Deprecated Value Members

1.  def formatted(fmtstr: String): String
   Implicit
     This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toStringFormat[(TypeDiagnostics.this)#checkUnused] 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.

2.  def →[B](y: B): ((TypeDiagnostics.this)#checkUnused, B)
   Implicit
     This member is added by an implicit conversion from (TypeDiagnostics.this)#checkUnused toArrowAssoc[(TypeDiagnostics.this)#checkUnused] 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 AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from(TypeDiagnostics.this)#checkUnused to any2stringadd[(TypeDiagnostics.this)#checkUnused]

### Inherited by implicit conversion StringFormat from(TypeDiagnostics.this)#checkUnused to StringFormat[(TypeDiagnostics.this)#checkUnused]

### Inherited by implicit conversion Ensuring from(TypeDiagnostics.this)#checkUnused to Ensuring[(TypeDiagnostics.this)#checkUnused]

### Inherited by implicit conversion ArrowAssoc from(TypeDiagnostics.this)#checkUnused to ArrowAssoc[(TypeDiagnostics.this)#checkUnused]

### Ungrouped