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 nsc
  Definition Classes
    tools
-  package ast
  Definition Classes
    nsc
-  package parser
  Definition Classes
    ast
-  trait Scanners extends ScannersCommon
  Definition Classes
    parser
- CommonTokenData
- DocScanner
- MalformedInput
- ParensAnalyzer
- Scanner
- ScannerCommon
- ScannerData
- SourceFileScanner
- TokenData
- UnitScanner

c

scala.tools.nsc.ast.parser.Scanners

# SourceFileScanner 

###

#### class SourceFileScanner extends Scanner

A scanner for a given source file not necessarily attached to a compilation unit. Useful for looking inside source files that are not currently compiled to see what's there

Source
  Scanners.scala

Linear Supertypes
Scanner, Scanners.DocScanner, Scanners.ScannerCommon, ScannerData, TokenData, Scanners.CommonTokenData, CharArrayReader, CharArrayReaderData, AnyRef, Any
Known Subclasses
ParensAnalyzer, UnitScanner, ScaladocUnitScanner
 
Ordering

1. Alphabetic
2. By Inheritance

Inherited

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

Implicitly

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

1. Hide All
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Visibility

1. Public
2. All

### Instance Constructors

1.  new SourceFileScanner(source: SourceFile)

### Type Members

1.  class CharArrayLookaheadReader extends CharArrayReader
   Definition Classes
     CharArrayReader

### 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 SourceFileScanner to any2stringadd[SourceFileScanner] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ->[B](y: B): (SourceFileScanner, B)
   Implicit
     This member is added by an implicit conversion from SourceFileScanner to ArrowAssoc[SourceFileScanner] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
5.  final def ==(arg0: Any): Boolean
   Definition Classes
     AnyRef → Any
6.  def applyBracePatch(): Boolean

   overridden in UnitScanners: apply brace patch if one exists for this offset return true if subsequent end of line handling should be suppressed.

   overridden in UnitScanners: apply brace patch if one exists for this offset return true if subsequent end of line handling should be suppressed.

   Definition Classes
     Scanner
7.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
8.  val base: Int

   the base of a number

   the base of a number

   Definition Classes
     TokenData
9.  def beginDocComment(prefix: String): Unit
   Attributes
     protected
   Definition Classes
     DocScanner
10.  val bidiChars: ListBuffer[(Int, Int)]
    Definition Classes
      CharArrayReader
11.  val buf: Array[Char]
    Definition Classes
      SourceFileScanner → CharArrayReader
12.  val cbuf: java.lang.StringBuilder

    A character buffer for literals

    A character buffer for literals

    Definition Classes
      Scanner
13.  val 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.  val 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
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( ... ) @native()
19.  def copyFrom(sd: ScannerData): SourceFileScanner.this.type
    Definition Classes
      ScannerData
20.  def copyFrom(td: TokenData): SourceFileScanner.this.type
    Definition Classes
      TokenData
21.  def copyFrom(cd: CharArrayReaderData): SourceFileScanner.this.type
    Definition Classes
      CharArrayReaderData
22.  val decodeUni: Boolean
    Definition Classes
      SourceFileScanner → CharArrayReader
23.  def deprecationWarning(off: Scanners.Offset, msg: String, since: String): Unit
    Definition Classes
      SourceFileScanner → ScannerCommon
24.  def deprecationWarning(msg: String, since: String): Unit
    Definition Classes
      Scanner
25.  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
      DocScanner
26.  def doubleVal: Double
    Definition Classes
      Scanner
27.  def doubleVal(negated: Boolean): Double

    Convert current strVal, base to double value.

    Convert current strVal, base to double value.

    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.

    Attributes
      protected
    Definition Classes
      Scanner
29.  def ensuring(cond: (SourceFileScanner) ⇒ Boolean, msg: ⇒ Any): SourceFileScanner
    Implicit
      This member is added by an implicit conversion from SourceFileScanner to Ensuring[SourceFileScanner] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
30.  def ensuring(cond: (SourceFileScanner) ⇒ Boolean): SourceFileScanner
    Implicit
      This member is added by an implicit conversion from SourceFileScanner to Ensuring[SourceFileScanner] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
31.  def ensuring(cond: Boolean, msg: ⇒ Any): SourceFileScanner
    Implicit
      This member is added by an implicit conversion from SourceFileScanner to Ensuring[SourceFileScanner] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
32.  def ensuring(cond: Boolean): SourceFileScanner
    Implicit
      This member is added by an implicit conversion from SourceFileScanner to Ensuring[SourceFileScanner] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
33.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
34.  def equals(arg0: Any): Boolean
    Definition Classes
      AnyRef → Any
35.  def error(off: 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
      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
    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
38.  def finishDocComment(): Unit
    Attributes
      protected
    Definition Classes
      DocScanner
39.  def floatVal: Float
    Definition Classes
      Scanner
40.  def floatVal(negated: Boolean): Float

    Convert current strVal, base to float value.

    Convert current strVal, base to float value.

    Definition Classes
      Scanner
41.  def flushDoc(): Global.DocComment
    Definition Classes
      DocScanner
42.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
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
    Definition Classes
      AnyRef → Any
    Annotations
      @native()
47.  def healBraces(): List[BracePatch]

    overridden in UnitScanners

    overridden in UnitScanners

    Definition Classes
      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
      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 intVal: Long
    Definition Classes
      Scanner
54.  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
55.  def invalidEscape(): Unit
    Attributes
      protected
    Definition Classes
      Scanner
56.  def isAtEnd: Boolean
    Definition Classes
      Scanner
57.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
58.  def isUnicodeEscape: Boolean

    Is last character a unicode escape \\uxxxx?

    Is last character a unicode escape \\uxxxx?

    Definition Classes
      CharArrayReader
59.  val 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
60.  val 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
61.  val lastUnicodeOffset: Int
    Attributes
      protected
    Definition Classes
      CharArrayReaderData
62.  val lineStartOffset: Int

    The start offset of the current line

    The start offset of the current line

    Definition Classes
      CharArrayReaderData
63.  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
64.  val name: Global.TermName

    the name of an identifier

    the name of an identifier

    Definition Classes
      TokenData → CommonTokenData
65.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
66.  val next: TokenData

    we need one token lookahead and one token history

    we need one token lookahead and one token history

    Definition Classes
      ScannerData
67.  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
68.  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
69.  def nextToken(): Unit

    Produce next token, filling TokenData fields of Scanner.

    Produce next token, filling TokenData fields of Scanner.

    Definition Classes
      Scanner → ScannerCommon
70.  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
71.  final def notify(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
72.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
    Annotations
      @native()
73.  val 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
74.  def parenBalance(token: Scanners.Token): Int

    overridden in UnitScanners

    overridden in UnitScanners

    Definition Classes
      Scanner
75.  val prev: TokenData
    Definition Classes
      ScannerData
76.  def processCommentChar(): Unit
    Attributes
      protected
    Definition Classes
      DocScanner
77.  def putChar(c: Char): Unit

    append Unicode character to "cbuf" buffer

    append Unicode character to "cbuf" buffer

    Attributes
      protected
    Definition Classes
      Scanner
78.  final def putCommentChar(): Unit
    Attributes
      protected
    Definition Classes
      Scanner
79.  def registerDocComment(raw: String, pos: Global.Position): Unit
    Definition Classes
      DocScanner
80.  def resume(lastCode: Scanners.Token): Unit
    Definition Classes
      Scanner
81.  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
82.  def skipCASE(): Unit

    Advance beyond a case token without marking the CASE in sepRegions.

    Advance beyond a case token without marking the CASE in sepRegions. This method should be called to skip beyond CASE tokens that are not part of matches, i.e. no ARROW is expected after them.

    Definition Classes
      Scanner
83.  final def skipComment(): Boolean

    Definition Classes
      Scanner
84.  final def skipNestedComments(): Unit
    Definition Classes
      Scanner
    Annotations
      @tailrec()
85.  def skipToken(): Scanners.Offset

    read next token and return last offset

    read next token and return last offset

    Definition Classes
      Scanner
86.  val source: SourceFile
87.  val strVal: String

    the string value of a literal

    the string value of a literal

    Definition Classes
      TokenData
88.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
89.  def syntaxError(msg: String): Unit

    generate an error at the current token offset

    generate an error at the current token offset

    Definition Classes
      Scanner
90.  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
91.  def toString(): String
    Definition Classes
      Scanner → AnyRef → Any
92.  val token: Scanners.Token

    the next token

    the next token

    Definition Classes
      TokenData → CommonTokenData
93.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
94.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
95.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... ) @native()
96.  def warning(off: Scanners.Offset, msg: String, category: WarningCategory): Unit
    Definition Classes
      SourceFileScanner → ScannerCommon
97.  def →[B](y: B): (SourceFileScanner, B)
    Implicit
      This member is added by an implicit conversion from SourceFileScanner to ArrowAssoc[SourceFileScanner] 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 SourceFileScanner to StringFormat[SourceFileScanner] 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 Scanner

### Inherited from Scanners.DocScanner

### 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 SourceFileScanner to any2stringadd[SourceFileScanner]

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

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

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

### Ungrouped