Packages

t

scala.reflect.api

Position

trait Position extends Attachments

EXPERIMENTAL

Position tracks the origin of symbols and tree nodes. They are commonly used when displaying warnings and errors, to indicate the incorrect point in the program.

Every non-empty position refers to a SourceFile and three character offsets within it: start, end, and point. The point is where the ^ belongs when issuing an error message, usually a Name. A range position can be designated as transparent, which excuses it from maintaining the invariants to follow. If a transparent position has opaque children, those are considered as if they were the direct children of the transparent position's parent.

Note: some of these invariants actually apply to the trees which carry the positions, but they are phrased as if the positions themselves were the parent/children for conciseness.

Invariant 1: in a focused/offset position, start == point == end Invariant 2: in a range position, start <= point < end Invariant 3: an offset position never has a child with a range position Invariant 4: every range position child of a range position parent is contained within its parent Invariant 5: opaque range position siblings overlap at most at a single point

The following tests are useful on positions:

pos.isDefined true if position is not an UndefinedPosition (those being NoPosition and FakePos) pos.isRange true if position is a range (opaque or transparent) which implies start < end pos.isOpaqueRange true if position is an opaque range

The following accessor methods are provided - an exception will be thrown if point/start/end are attempted on an UndefinedPosition.

pos.source The source file of the position, or NoSourceFile if unavailable pos.point The offset of the point pos.start The (inclusive) start offset, or the point of an offset position pos.end The (exclusive) end offset, or the point of an offset position

The following conversion methods are often used:

pos.focus Converts a range position to an offset position focused on the point pos.makeTransparent Convert an opaque range into a transparent range

For more information about Positions, see the Reflection Guide: Annotations, Names, Scopes, and More

Source
Position.scala
Linear Supertypes
Attachments, AnyRef, Any
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  1. Position
  2. Attachments
  3. AnyRef
  4. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Type Members

  1. abstract type Pos >: Null <: Position

    The position type of this attachment

    The position type of this attachment

    Definition Classes
    Position → Attachments

Abstract Value Members

  1. abstract def all: Set[Any]

    The underlying payload with the guarantee that no two elements have the same type.

    The underlying payload with the guarantee that no two elements have the same type.

    Definition Classes
    Attachments
  2. abstract def column: Int

    The position indicates a column and the line in the source file.

  3. abstract def end: Int

    The end of the position's range, or the point if not a range position.

  4. abstract def focus: Pos

    If this is a range position, the offset position of its point.

    If this is a range position, the offset position of its point. Otherwise the position itself

  5. abstract def isEmpty: Boolean
    Definition Classes
    Attachments
  6. abstract def isOpaqueRange: Boolean

    Is this position a non-transparent range position?

  7. abstract def isRange: Boolean

    Is this position a range position?

  8. abstract def isTransparent: Boolean

    Is this position a transparent position?

  9. abstract def line: Int

    The position indicates a column and the line in the source file.

  10. abstract def makeTransparent: Pos

    If opaque range, make this position transparent.

  11. abstract def point: Int

    The point (where the ^ is) of the position, which is easiest to access using the line and column values. The line content is also available.

  12. abstract def pos: Pos

    The underlying position

    The underlying position

    Definition Classes
    Attachments
  13. abstract def source: SourceFile

    Java file corresponding to the source file of this position.

    Java file corresponding to the source file of this position.

    The return type is scala.reflect.io.AbstractFile, which belongs to an experimental part of Scala reflection. It should not be used unless you know what you are doing. In subsequent releases, this API will be refined and exposed as a part of scala.reflect.api.

  14. abstract def start: Int

    The start of the position's range, or the point if not a range position.

  15. abstract def withEnd(off: Int): Pos

    Returns a new position with the same attributes, but a different end value (if a range).

  16. abstract def withPoint(off: Int): Pos

    Returns a new position with the same attributes, but a different point value (if a range or offset).

  17. abstract def withPos(newPos: Pos): Attachments { type Pos = Position.this.Pos }

    Creates a copy of this attachment with the position replaced by newPos

    Creates a copy of this attachment with the position replaced by newPos

    Definition Classes
    Attachments
  18. abstract def withStart(off: Int): Pos

    Returns a new position with the same attributes, but a different start value (if a range).

  19. abstract def endOrPoint: Int

    The end of the position's range, or point if not a range position.

    The end of the position's range, or point if not a range position.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  20. abstract def focusEnd: Pos

    If this is a range position, the offset position of its end.

    If this is a range position, the offset position of its end. Otherwise the position itself

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  21. abstract def focusStart: Pos

    If this is a range position, the offset position of its start.

    If this is a range position, the offset position of its start. Otherwise the position itself

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  22. abstract def includes(pos: Pos): Boolean

    Does this position include the given position pos? This holds if this is a range position and its range [start..end] is the same or covers the range of the given position, which may or may not be a range position.

    Does this position include the given position pos? This holds if this is a range position and its range [start..end] is the same or covers the range of the given position, which may or may not be a range position.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  23. abstract def isDefined: Boolean

    Is this position not a NoPosition? If isDefined is true, offset and source are both defined.

    Is this position not a NoPosition? If isDefined is true, offset and source are both defined.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  24. abstract def lineContent: String

    The content of the line this Position refers to.

    The content of the line this Position refers to.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  25. abstract def overlaps(pos: Pos): Boolean

    Does this position overlap with that position? This holds if both positions are ranges and there is an interval of non-zero length that is shared by both position ranges.

    Does this position overlap with that position? This holds if both positions are ranges and there is an interval of non-zero length that is shared by both position ranges.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  26. abstract def pointOrElse(default: Int): Int

    The point (where the ^ is) of the position, or else default if undefined.

    The point (where the ^ is) of the position, or else default if undefined.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  27. abstract def precedes(pos: Pos): Boolean

    Does this position precede that position? This holds if both positions are defined and the end point of this position is not larger than the start point of the given position.

    Does this position precede that position? This holds if both positions are defined and the end point of this position is not larger than the start point of the given position.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  28. abstract def properlyIncludes(pos: Pos): Boolean

    Does this position properly include the given position pos ("properly" meaning their ranges are not the same)?

    Does this position properly include the given position pos ("properly" meaning their ranges are not the same)?

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  29. abstract def properlyPrecedes(pos: Pos): Boolean

    Does this position properly precede the given position pos ("properly" meaning their ranges do not share a common point).

    Does this position properly precede the given position pos ("properly" meaning their ranges do not share a common point).

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  30. abstract def sameRange(pos: Pos): Boolean

    Does this position cover the same range as that position? Holds only if both position are ranges

    Does this position cover the same range as that position? Holds only if both position are ranges

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  31. abstract def show: String

    Show a textual representation of the position.

    Show a textual representation of the position.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) use universe.show(position) instead

  32. abstract def startOrPoint: Int

    The start of the position's range, or point if not a range position.

    The start of the position's range, or point if not a range position.

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  33. abstract def toSingleLine: Pos

    Convert this to a position around point that spans a single source line

    Convert this to a position around point that spans a single source line

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

  34. abstract def union(pos: Pos): Pos

    If this is a range, the union with the other range, with the point of this position.

    If this is a range, the union with the other range, with the point of this position. Otherwise, this position

    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) removed from the public API

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 Position to any2stringadd[Position] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Position, B)
    Implicit
    This member is added by an implicit conversion from Position to ArrowAssoc[Position] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def addElement[T](attachment: T): Attachments { type Pos = Position.this.Pos }

    Creates a copy of this attachment with the given element added.

    Creates a copy of this attachment with the given element added.

    Definition Classes
    Attachments
  7. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  8. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  9. def contains[T](implicit arg0: ClassTag[T]): Boolean

    Check underlying payload contains an instance of type T.

    Check underlying payload contains an instance of type T.

    Definition Classes
    Attachments
  10. final def containsElement(element: Any): Boolean

    Tests if the given element is attached.

    Tests if the given element is attached.

    Definition Classes
    Attachments
  11. def ensuring(cond: (Position) ⇒ Boolean, msg: ⇒ Any): Position
    Implicit
    This member is added by an implicit conversion from Position to Ensuring[Position] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: (Position) ⇒ Boolean): Position
    Implicit
    This member is added by an implicit conversion from Position to Ensuring[Position] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean, msg: ⇒ Any): Position
    Implicit
    This member is added by an implicit conversion from Position to Ensuring[Position] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: Boolean): Position
    Implicit
    This member is added by an implicit conversion from Position to Ensuring[Position] 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. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from Position to StringFormat[Position] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  19. def get[T](implicit arg0: ClassTag[T]): Option[T]

    An underlying payload of the given class type T.

    An underlying payload of the given class type T.

    Definition Classes
    Attachments
  20. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  21. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  22. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  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 remove[T](implicit arg0: ClassTag[T]): Attachments { type Pos = Position.this.Pos }

    Creates a copy of this attachment with the payload of the given class type T removed.

    Creates a copy of this attachment with the payload of the given class type T removed.

    Definition Classes
    Attachments
  27. final def removeElement[T](attachment: T): Attachments { type Pos = Position.this.Pos }

    Creates a copy of this attachment with the given element removed.

    Creates a copy of this attachment with the given element removed.

    Definition Classes
    Attachments
  28. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  29. def toString(): String
    Definition Classes
    AnyRef → Any
  30. def update[T](attachment: T)(implicit arg0: ClassTag[T]): Attachments { type Pos = Position.this.Pos }

    Creates a copy of this attachment with the payload slot of T added/updated with the provided value.

    Creates a copy of this attachment with the payload slot of T added/updated with the provided value. Replaces an existing payload of the same type, if exists.

    Definition Classes
    Attachments
  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 →[B](y: B): (Position, B)
    Implicit
    This member is added by an implicit conversion from Position to ArrowAssoc[Position] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Attachments

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Position to any2stringadd[Position]

Inherited by implicit conversion StringFormat from Position to StringFormat[Position]

Inherited by implicit conversion Ensuring from Position to Ensuring[Position]

Inherited by implicit conversion ArrowAssoc from Position to ArrowAssoc[Position]

Commonly used methods

Ungrouped