scala.tools.nsc.ast.parser.Scanners

# ParensAnalyzer

###
Related Doc: package Scanners

#### class ParensAnalyzer extends UnitScanner

Source
  Scanners.scala

Linear Supertypes
UnitScanner, SourceFileScanner, Scanner, Scanners.ScannerCommon, ScannerData, TokenData, Scanners.CommonTokenData, CharArrayReader, CharArrayReaderData, AnyRef, Any
Type Hierarchy
Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. ParensAnalyzer
2. UnitScanner
3. SourceFileScanner
4. Scanner
5. ScannerCommon
6. ScannerData
7. TokenData
8. CommonTokenData
9. CharArrayReader
10. CharArrayReaderData
11. AnyRef
12. Any

Implicitly

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

1. Hide All
2. Show All

Visibility

1. Public
2. All

### Instance Constructors

1. #### new ParensAnalyzer(unit: Global.CompilationUnit, patches: List[BracePatch])

### Type Members

1. #### class CharArrayLookaheadReader extends CharArrayReader

   Definition Classes
     CharArrayReader

### Value Members

1. #### final def !=(arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

     `true` if !(this == that), false otherwise.

   Definition Classes
     AnyRef → Any

2. #### final def ##(): Int

   Equivalent to `x.hashCode` except for boxed numeric types and `null`.

   Equivalent to `x.hashCode` except for boxed numeric types and `null`. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For `null` returns a hashcode where `null.hashCode` throws a `NullPointerException`.

   returns

     a hash value consistent with ==

   Definition Classes
     AnyRef → Any

3. #### def +(other: String): String

   Implicit information
     This member is added by an implicit conversion from ParensAnalyzer to any2stringadd[ParensAnalyzer] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd

4. #### def ->[B](y: B): (ParensAnalyzer, B)

   Implicit information
     This member is added by an implicit conversion from ParensAnalyzer to ArrowAssoc[ParensAnalyzer] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

5. #### final def ==(arg0: Any): Boolean

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   returns

     `true` if the receiver object is equivalent to the argument; `false` otherwise.

   Definition Classes
     AnyRef → Any

6. #### def applyBracePatch(): Boolean

   Insert or delete a brace, if a patch exists for this offset

   Insert or delete a brace, if a patch exists for this offset

   Definition Classes
     UnitScanner → Scanner

7. #### final def asInstanceOf[T0]: T0

   Cast the receiver object to be of type `T0`.

   Cast the receiver object to be of type `T0`.

   Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression `1.asInstanceOf[String]` will throw a `ClassCastException` at runtime, while the expression `List(1).asInstanceOf[List[String]]` will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

   returns

     the receiver object.

   Definition Classes
     Any
   Exceptions thrown

     `ClassCastException` if the receiver object is not an instance of the erasure of type `T0`.

8. #### val balance: Map[Int, Int]

9. #### var base: Int

   the base of a number

   the base of a number

   Definition Classes
     TokenData

10. #### val bracePairs: List[BracePair]

    The list of matching top-level brace pairs (each of which may contain nested brace pairs).

11. #### val buf: Array[Char]

    Definition Classes
      SourceFileScanner → CharArrayReader

12. #### val cbuf: collection.mutable.StringBuilder

    A character buffer for literals

    A character buffer for literals

    Definition Classes
      Scanner

13. #### var ch: Char

    the last read character

    the last read character

    Definition Classes
      CharArrayReaderData

14. #### def charLitOr(op: () ⇒ Unit): Unit

    Parse character literal if current character is followed by \', or follow with given op and return a symbol literal token

    Parse character literal if current character is followed by \', or follow with given op and return a symbol literal token

    Definition Classes
      Scanner

15. #### var charOffset: Int

    The offset one past the last read character

    The offset one past the last read character

    Definition Classes
      CharArrayReaderData

16. #### def charVal: Char

    Convert current strVal to char value

    Convert current strVal to char value

    Definition Classes
      Scanner

17. #### def checkNoLetter(): Unit

    Definition Classes
      Scanner

18. #### def clone(): AnyRef

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the `clone` method is platform dependent.

    returns

      a copy of the receiver object.

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
    Note

      not specified by SLS as a member of AnyRef

19. #### def column(offset: Scanners.Offset): Int

20. #### def copyFrom(sd: ScannerData): ParensAnalyzer.this.type

    Definition Classes
      ScannerData

21. #### def copyFrom(td: TokenData): ParensAnalyzer.this.type

    Definition Classes
      TokenData

22. #### def copyFrom(cd: CharArrayReaderData): ParensAnalyzer.this.type

    Definition Classes
      CharArrayReaderData

23. #### val decodeUni: Boolean

    Definition Classes
      SourceFileScanner → CharArrayReader

24. #### def deleteRBrace(): List[BracePatch]

25. #### def deprecationWarning(off: Scanners.Offset, msg: String): Unit

    Definition Classes
      UnitScanner → SourceFileScanner → ScannerCommon

26. #### def deprecationWarning(msg: String): Unit

    Definition Classes
      Scanner

27. #### def discardDocBuffer(): Unit

    To prevent doc comments attached to expressions from leaking out of scope onto the next documentable entity, they are discarded upon passing a right brace, bracket, or parenthesis.

    To prevent doc comments attached to expressions from leaking out of scope onto the next documentable entity, they are discarded upon passing a right brace, bracket, or parenthesis.

    Definition Classes
      Scanner

28. #### def emitIdentifierDeprecationWarnings: Boolean

    Determines whether this scanner should emit identifier deprecation warnings, e.g.

    Determines whether this scanner should emit identifier deprecation warnings, e.g. when seeing `macro` or `then`, which are planned to become keywords in future versions of Scala.

    Definition Classes
      ParensAnalyzer → Scanner

29. #### def ensuring(cond: (ParensAnalyzer) ⇒ Boolean, msg: ⇒ Any): ParensAnalyzer

    Implicit information
      This member is added by an implicit conversion from ParensAnalyzer to Ensuring[ParensAnalyzer] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

30. #### def ensuring(cond: (ParensAnalyzer) ⇒ Boolean): ParensAnalyzer

    Implicit information
      This member is added by an implicit conversion from ParensAnalyzer to Ensuring[ParensAnalyzer] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

31. #### def ensuring(cond: Boolean, msg: ⇒ Any): ParensAnalyzer

    Implicit information
      This member is added by an implicit conversion from ParensAnalyzer to Ensuring[ParensAnalyzer] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

32. #### def ensuring(cond: Boolean): ParensAnalyzer

    Implicit information
      This member is added by an implicit conversion from ParensAnalyzer to Ensuring[ParensAnalyzer] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

33. #### final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (`that`) is a reference to the receiver object (`this`).

    Tests whether the argument (`that`) is a reference to the receiver object (`this`).

    The `eq` method implements an equivalence relation on non-null instances of `AnyRef`, and has three additional properties:

    - It is consistent: for any non-null instances `x` and `y` of type `AnyRef`, multiple invocations of `x.eq(y)` consistently returns `true` or consistently returns `false`.
    - For any non-null instance `x` of type `AnyRef`, `x.eq(null)` and `null.eq(x)` returns `false`.
    - `null.eq(null)` returns `true`.

    When overriding the `equals` or `hashCode` methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (`o1 eq o2`), they should be equal to each other (`o1 == o2`) and they should hash to the same value (`o1.hashCode == o2.hashCode`).

    returns

      `true` if the argument is a reference to the receiver object; `false` otherwise.

    Definition Classes
      AnyRef

34. #### def equals(arg0: Any): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to `eq`.

    See also `equals` in scala.Any.

    returns

      `true` if the receiver object is equivalent to the argument; `false` otherwise.

    Definition Classes
      AnyRef → Any

35. #### def error(offset: Scanners.Offset, msg: String): Unit

    An error routine to call on bad unicode escapes \\uxxxx.

    An error routine to call on bad unicode escapes \\uxxxx.

    Definition Classes
      ParensAnalyzer → UnitScanner → SourceFileScanner → ScannerCommon → CharArrayReader

36. #### final def fetchToken(): Unit

    read next token, filling TokenData fields of Scanner.

    read next token, filling TokenData fields of Scanner.

    Attributes
      protected
    Definition Classes
      Scanner

37. #### def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the `finalize` method is invoked, as well as the interaction between `finalize` and non-local returns and exceptions, are all platform dependent.

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
    Note

      not specified by SLS as a member of AnyRef

38. #### def floatVal: Double

    Definition Classes
      Scanner

39. #### def floatVal(negated: Boolean): Double

    Convert current strVal, base to double value

    Convert current strVal, base to double value

    Definition Classes
      Scanner

40. #### def flushDoc(): Global.DocComment

    Definition Classes
      Scanner

41. #### def formatted(fmtstr: String): String

    Implicit information
      This member is added by an implicit conversion from ParensAnalyzer to StringFormat[ParensAnalyzer] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

42. #### final def getClass(): Class[_]

    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

      a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
      AnyRef → Any
    Note

      not specified by SLS as a member of AnyRef

43. #### def getFraction(): Unit

    read fractional part and exponent of floating point number if one is present.

    read fractional part and exponent of floating point number if one is present.

    Attributes
      protected
    Definition Classes
      Scanner

44. #### def getLitChar(): Unit

    copy current character into cbuf, interpreting any escape sequences, and advance to next character.

    copy current character into cbuf, interpreting any escape sequences, and advance to next character.

    Attributes
      protected
    Definition Classes
      Scanner

45. #### def getNumber(): Unit

    Read a number into strVal.

    Read a number into strVal.

    The `base` can be 8, 10 or 16, where base 8 flags a leading zero. For ints, base 8 is legal only for the case of exactly one zero.

    Attributes
      protected
    Definition Classes
      Scanner

46. #### def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

      the hash code value for this object.

    Definition Classes
      AnyRef → Any

47. #### def healBraces(): List[BracePatch]

    overridden in UnitScanners

    overridden in UnitScanners

    Definition Classes
      UnitScanner → Scanner

48. #### def inFirstOfStat(token: Scanners.Token): Boolean

    Can token start a statement?

    Can token start a statement?

    Definition Classes
      Scanner

49. #### def inLastOfStat(token: Scanners.Token): Boolean

    Can token end a statement?

    Can token end a statement?

    Definition Classes
      Scanner

50. #### def incompleteInputError(off: Scanners.Offset, msg: String): Unit

    Definition Classes
      UnitScanner → SourceFileScanner → ScannerCommon

51. #### def incompleteInputError(msg: String): Unit

    signal an error where the input ended in the middle of a token

    signal an error where the input ended in the middle of a token

    Definition Classes
      Scanner

52. #### def init(): Unit

    Initialization method: read first char, then first token

    Initialization method: read first char, then first token

    Definition Classes
      Scanner

53. #### def insertPatch(patches: List[BracePatch], patch: BracePatch): List[BracePatch]

54. #### def insertRBrace(): List[BracePatch]

55. #### def intVal: Long

    Definition Classes
      Scanner

56. #### def intVal(negated: Boolean): Long

    Convert current strVal, base to long value.

    Convert current strVal, base to long value. This is tricky because of max negative value.

    Conversions in base 10 and 16 are supported. As a permanent migration path, attempts to write base 8 literals except `0` emit a verbose error.

    Definition Classes
      Scanner

57. #### def invalidEscape(): Unit

    Attributes
      protected
    Definition Classes
      Scanner

58. #### def isAtEnd: Boolean

    Definition Classes
      Scanner

59. #### final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is `T0`.

    Test whether the dynamic type of the receiver object is `T0`.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression `1.isInstanceOf[String]` will return `false`, while the expression `List(1).isInstanceOf[List[String]]` will return `true`. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

      `true` if the receiver object is an instance of erasure of type `T0`; `false` otherwise.

    Definition Classes
      Any

60. #### def isUnicodeEscape: Boolean

    Is last character a unicode escape \\uxxxx?

    Is last character a unicode escape \\uxxxx?

    Definition Classes
      CharArrayReader

61. #### var lastLineStartOffset: Int

    The start offset of the line before the current one

    The start offset of the line before the current one

    Definition Classes
      CharArrayReaderData

62. #### var lastOffset: Scanners.Offset

    the offset of the character following the token preceding this one

    the offset of the character following the token preceding this one

    Definition Classes
      TokenData

63. #### var lastUnicodeOffset: Int

    Attributes
      protected
    Definition Classes
      CharArrayReaderData

64. #### def line(offset: Scanners.Offset): Int

65. #### val lineStart: ArrayBuffer[Int]

    The offset of the first token on this line, or next following line if blank

66. #### var lineStartOffset: Int

    The start offset of the current line

    The start offset of the current line

    Definition Classes
      CharArrayReaderData

67. #### def lookaheadReader: CharArrayLookaheadReader

    A new reader that takes off at the current character position

    A new reader that takes off at the current character position

    Definition Classes
      CharArrayReader

68. #### var name: Global.TermName

    the name of an identifier

    the name of an identifier

    Definition Classes
      TokenData → CommonTokenData

69. #### final def ne(arg0: AnyRef): Boolean

    Equivalent to `!(this eq that)`.

    Equivalent to `!(this eq that)`.

    returns

      `true` if the argument is not a reference to the receiver object; `false` otherwise.

    Definition Classes
      AnyRef

70. #### val next: TokenData

    we need one token lookahead and one token history

    we need one token lookahead and one token history

    Definition Classes
      ScannerData

71. #### final def nextChar(): Unit

    Advance one character; reducing CR;LF pairs to just LF

    Advance one character; reducing CR;LF pairs to just LF

    Definition Classes
      CharArrayReader

72. #### final def nextRawChar(): Unit

    Advance one character, leaving CR;LF pairs intact.

    Advance one character, leaving CR;LF pairs intact. This is for use in multi-line strings, so there are no "potential line ends" here.

    Definition Classes
      CharArrayReader

73. #### def nextToken(): Unit

    Produce next token, filling TokenData fields of Scanner.

    Produce next token, filling TokenData fields of Scanner.

    Definition Classes
      Scanner

74. #### def nextTokenAllow(name: Global.Name): Unit

    Get next token, and allow the otherwise deprecated ident `name`

    Get next token, and allow the otherwise deprecated ident `name`

    Definition Classes
      Scanner

75. #### final def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
      AnyRef
    Note

      not specified by SLS as a member of AnyRef

76. #### final def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
      AnyRef
    Note

      not specified by SLS as a member of AnyRef

77. #### var offset: Scanners.Offset

    the offset of the first character of the current token

    the offset of the first character of the current token

    Definition Classes
      TokenData

78. #### def parenBalance(token: Scanners.Token): Int

    overridden in UnitScanners

    overridden in UnitScanners

    Definition Classes
      UnitScanner → Scanner

79. #### lazy val parensAnalyzer: ParensAnalyzer

    Definition Classes
      UnitScanner

80. #### val prev: TokenData

    Definition Classes
      ScannerData

81. #### def putChar(c: Char): Unit

    append Unicode character to "cbuf" buffer

    append Unicode character to "cbuf" buffer

    Attributes
      protected
    Definition Classes
      Scanner

82. #### def putCommentChar(): Unit

    Attributes
      protected
    Definition Classes
      Scanner

83. #### def resume(lastCode: Scanners.Token): Unit

    Definition Classes
      Scanner

84. #### var sepRegions: List[Scanners.Token]

    a stack of tokens which indicates whether line-ends can be statement separators also used for keeping track of nesting levels.

    a stack of tokens which indicates whether line-ends can be statement separators also used for keeping track of nesting levels. We keep track of the closing symbol of a region. This can be RPAREN if region starts with '(' RBRACKET if region starts with '[' RBRACE if region starts with '{' ARROW if region starts with 'case' STRINGLIT if region is a string interpolation expression starting with '${' (the STRINGLIT appears twice in succession on the stack iff the expression is a multiline string literal).

    Definition Classes
      Scanner

85. #### def skipBlockComment(): Unit

    Definition Classes
      Scanner

86. #### def skipComment(): Boolean

    Definition Classes
      Scanner

87. #### def skipDocComment(): Unit

    Definition Classes
      Scanner

88. #### final def skipNestedComments(): Unit

    Definition Classes
      Scanner
    Annotations
      @tailrec()

89. #### def skipToken(): Scanners.Offset

    read next token and return last offset

    read next token and return last offset

    Definition Classes
      Scanner

90. #### val source: SourceFile

    Definition Classes
      SourceFileScanner

91. #### var strVal: String

    the string value of a literal

    the string value of a literal

    Definition Classes
      TokenData

92. #### final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
      AnyRef

93. #### def syntaxError(msg: String): Unit

    generate an error at the current token offset

    generate an error at the current token offset

    Definition Classes
      Scanner

94. #### def syntaxError(off: Scanners.Offset, msg: String): Unit

    generate an error at the given offset

    generate an error at the given offset

    Definition Classes
      Scanner

95. #### var tabSeen: Boolean

96. #### def toString(): String

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

      a String representation of the object.

    Definition Classes
      Scanner → AnyRef → Any

97. #### var token: Scanners.Token

    the next token

    the next token

    Definition Classes
      TokenData → CommonTokenData

98. #### val unit: Global.CompilationUnit

    Definition Classes
      UnitScanner

99. #### final def wait(): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

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

     Definition Classes
       AnyRef
     Annotations
       @throws( ... )

101. #### final def wait(arg0: Long): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws( ... )

102. #### def →[B](y: B): (ParensAnalyzer, B)

     Implicit information
       This member is added by an implicit conversion from ParensAnalyzer to ArrowAssoc[ParensAnalyzer] performed by method ArrowAssoc in scala.Predef.
     Definition Classes
       ArrowAssoc

### Inherited from UnitScanner

### Inherited from SourceFileScanner

### Inherited from Scanner

### Inherited from Scanners.ScannerCommon

### Inherited from ScannerData

### Inherited from TokenData

### Inherited from Scanners.CommonTokenData

### Inherited from CharArrayReader

### Inherited from CharArrayReaderData

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from ParensAnalyzer to any2stringadd[ParensAnalyzer]

### Inherited by implicit conversion StringFormat from ParensAnalyzer to StringFormat[ParensAnalyzer]

### Inherited by implicit conversion Ensuring from ParensAnalyzer to Ensuring[ParensAnalyzer]

### Inherited by implicit conversion ArrowAssoc from ParensAnalyzer to ArrowAssoc[ParensAnalyzer]

### Ungrouped