java.lang.Object
- org.antlr.runtime.ANTLRStringStream

所有已实现的接口:

CharStream, IntStream

直接已知子类:

ANTLRFileStream, ANTLRReaderStream
```
public class ANTLRStringStream
extends java.lang.Object
implements CharStream
```
A pretty quick CharStream that pulls all data from an array directly. Every method call counts in the lexer. Java's strings aren't very good so I'm avoiding.

字段概要

字段
修饰符和类型	字段	说明
`protected int`	`charPositionInLine`	The index of the character relative to the beginning of the line 0..n-1
`protected char[]`	`data`	The data being scanned
`protected int`	`lastMarker`	Track the last mark() call result value for use in rewind().
`protected int`	`line`	line number 1..n within the input
`protected int`	`markDepth`	tracks how deep mark() calls are nested
`protected java.util.List<CharStreamState>`	`markers`	A list of CharStreamState objects that tracks the stream state values line, charPositionInLine, and p that can change as you move through the input stream.
`protected int`	`n`	How many characters are actually in the buffer
`java.lang.String`	`name`	What is name or source of this char stream?
`protected int`	`p`	0..n-1 index into string of next char

从接口继承的字段 org.antlr.runtime.CharStream
EOF

构造器概要

构造器
构造器	说明
`ANTLRStringStream()`
`ANTLRStringStream(char[] data, int numberOfActualCharsInArray)`	This is the preferred constructor as no data is copied
`ANTLRStringStream(java.lang.String input)`	Copy data in string to a local char array

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`consume()`
`int`	`getCharPositionInLine()`	The index of the character relative to the beginning of the line 0..n-1
`int`	`getLine()`	ANTLR tracks the line information automatically
`java.lang.String`	`getSourceName()`	Where are you getting symbols from? Normally, implementations will pass the buck all the way to the lexer who can ask its input stream for the file name or whatever.
`int`	`index()`	Return the current input symbol index 0..n where n indicates the last symbol has been read.
`int`	`LA(int i)`	Get int at current input pointer + i ahead where i=1 is next int.
`int`	`LT(int i)`	Get the ith character of lookahead.
`int`	`mark()`	Tell the stream to start buffering if it hasn't already.
`void`	`release(int marker)`	You may want to commit to a backtrack but don't want to force the stream to keep bookkeeping objects around for a marker that is no longer necessary.
`void`	`reset()`	Reset the stream so that it's in the same state it was when the object was created except the data array is not touched.
`void`	`rewind()`	Rewind to the input position of the last marker.
`void`	`rewind(int m)`	Reset the stream so that next call to index would return marker.
`void`	`seek(int index)`	consume() ahead until p==index; can't just set p=index as we must update line and charPositionInLine.
`void`	`setCharPositionInLine(int pos)`
`void`	`setLine(int line)`	Because this stream can rewind, we need to be able to reset the line
`int`	`size()`	Only makes sense for streams that buffer everything up probably, but might be useful to display the entire stream or for testing.
`java.lang.String`	`substring(int start, int stop)`	For infinite streams, you don't need this; primarily I'm providing a useful interface for action code.
`java.lang.String`	`toString()`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - data
```
protected char[] data
```
    The data being scanned
  - n
```
protected int n
```
    How many characters are actually in the buffer
  - p
```
protected int p
```
    0..n-1 index into string of next char
  - line
```
protected int line
```
    line number 1..n within the input
  - charPositionInLine
```
protected int charPositionInLine
```
    The index of the character relative to the beginning of the line 0..n-1
  - markDepth
```
protected int markDepth
```
    tracks how deep mark() calls are nested
  - markers
```
protected java.util.List<CharStreamState> markers
```
    A list of CharStreamState objects that tracks the stream state values line, charPositionInLine, and p that can change as you move through the input stream. Indexed from 1..markDepth. A null is kept @ index 0. Create upon first call to mark().
  - lastMarker
```
protected int lastMarker
```
    Track the last mark() call result value for use in rewind().
  - name
```
public java.lang.String name
```
    What is name or source of this char stream?
- 构造器详细资料
  - ANTLRStringStream
```
public ANTLRStringStream()
```
  - ANTLRStringStream
```
public ANTLRStringStream(java.lang.String input)
```
    Copy data in string to a local char array
  - ANTLRStringStream
```
public ANTLRStringStream(char[] data,
                         int numberOfActualCharsInArray)
```
    This is the preferred constructor as no data is copied
- 方法详细资料
  - reset
```
public void reset()
```
    Reset the stream so that it's in the same state it was when the object was created *except* the data array is not touched.
  - consume
```
public void consume()
```
    指定者:
    
    consume 在接口中 IntStream
  - LA
```
public int LA(int i)
```
    从接口复制的说明: IntStream
    
    Get int at current input pointer + i ahead where i=1 is next int. Negative indexes are allowed. LA(-1) is previous token (token just matched). LA(-i) where i is before first token should yield -1, invalid char / EOF.
    
    指定者:
    
    LA 在接口中 IntStream
  - LT
```
public int LT(int i)
```
    从接口复制的说明: CharStream
    
    Get the ith character of lookahead. This is the same usually as LA(i). This will be used for labels in the generated lexer code. I'd prefer to return a char here type-wise, but it's probably better to be 32-bit clean and be consistent with LA.
    
    指定者:
    
    LT 在接口中 CharStream
  - index
```
public int index()
```
    Return the current input symbol index 0..n where n indicates the last symbol has been read. The index is the index of char to be returned from LA(1).
    
    指定者:
    
    index 在接口中 IntStream
  - size
```
public int size()
```
    从接口复制的说明: IntStream
    
    Only makes sense for streams that buffer everything up probably, but might be useful to display the entire stream or for testing. This value includes a single EOF.
    
    指定者:
    
    size 在接口中 IntStream
  - mark
```
public int mark()
```
    从接口复制的说明: IntStream
    
    Tell the stream to start buffering if it hasn't already. Return current input position, index(), or some other marker so that when passed to rewind() you get back to the same spot. rewind(mark()) should not affect the input cursor. The Lexer track line/col info as well as input index so its markers are not pure input indexes. Same for tree node streams.
    
    指定者:
    
    mark 在接口中 IntStream
  - rewind
```
public void rewind(int m)
```
    从接口复制的说明: IntStream
    
    Reset the stream so that next call to index would return marker. The marker will usually be index() but it doesn't have to be. It's just a marker to indicate what state the stream was in. This is essentially calling release() and seek(). If there are markers created after this marker argument, this routine must unroll them like a stack. Assume the state the stream was in when this marker was created.
    
    指定者:
    
    rewind 在接口中 IntStream
  - rewind
```
public void rewind()
```
    从接口复制的说明: IntStream
    
    Rewind to the input position of the last marker. Used currently only after a cyclic DFA and just before starting a sem/syn predicate to get the input position back to the start of the decision. Do not "pop" the marker off the state. mark(i) and rewind(i) should balance still. It is like invoking rewind(last marker) but it should not "pop" the marker off. It's like seek(last marker's input position).
    
    指定者:
    
    rewind 在接口中 IntStream
  - release
```
public void release(int marker)
```
    从接口复制的说明: IntStream
    
    You may want to commit to a backtrack but don't want to force the stream to keep bookkeeping objects around for a marker that is no longer necessary. This will have the same behavior as rewind() except it releases resources without the backward seek. This must throw away resources for all markers back to the marker argument. So if you're nested 5 levels of mark(), and then release(2) you have to release resources for depths 2..5.
    
    指定者:
    
    release 在接口中 IntStream
  - seek
```
public void seek(int index)
```
    consume() ahead until p==index; can't just set p=index as we must update line and charPositionInLine.
    
    指定者:
    
    seek 在接口中 IntStream
  - substring
```
public java.lang.String substring(int start,
                                  int stop)
```
    从接口复制的说明: CharStream
    
    For infinite streams, you don't need this; primarily I'm providing a useful interface for action code. Just make sure actions don't use this on streams that don't support it.
    
    指定者:
    
    substring 在接口中 CharStream
  - getLine
```
public int getLine()
```
    从接口复制的说明: CharStream
    
    ANTLR tracks the line information automatically
    
    指定者:
    
    getLine 在接口中 CharStream
  - getCharPositionInLine
```
public int getCharPositionInLine()
```
    从接口复制的说明: CharStream
    
    The index of the character relative to the beginning of the line 0..n-1
    
    指定者:
    
    getCharPositionInLine 在接口中 CharStream
  - setLine
```
public void setLine(int line)
```
    从接口复制的说明: CharStream
    
    Because this stream can rewind, we need to be able to reset the line
    
    指定者:
    
    setLine 在接口中 CharStream
  - setCharPositionInLine
```
public void setCharPositionInLine(int pos)
```
    指定者:
    
    setCharPositionInLine 在接口中 CharStream
  - getSourceName
```
public java.lang.String getSourceName()
```
    从接口复制的说明: IntStream
    
    Where are you getting symbols from? Normally, implementations will pass the buck all the way to the lexer who can ask its input stream for the file name or whatever.
    
    指定者:
    
    getSourceName 在接口中 IntStream
  - toString
```
public java.lang.String toString()
```
    覆盖:
    
    toString 在类中 java.lang.Object

类 ANTLRStringStream

字段概要

从接口继承的字段 org.antlr.runtime.CharStream

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

data

n

p

line

charPositionInLine

markDepth

markers

lastMarker

name

构造器详细资料

ANTLRStringStream

ANTLRStringStream

ANTLRStringStream

方法详细资料

reset

consume

LA

LT

index

size

mark

rewind

rewind

release

seek

substring

getLine

getCharPositionInLine

setLine

setCharPositionInLine

getSourceName

toString