Scanner

java.lang.Object
- com.oracle.js.parser.Scanner

Direct Known Subclasses:

Lexer
```
public class Scanner
extends Object
```
Utility for scanning thru a char array.

Field Summary

Fields
Modifier and Type	Field and Description
`protected char`	`ch0` Current character in stream
`protected char`	`ch1` 1 character lookahead
`protected char`	`ch2` 2 character lookahead
`protected char`	`ch3` 3 character lookahead
`protected String`	`content` Characters to scan.
`protected int`	`limit` Scan limit.
`protected int`	`line` Current line number.
`protected int`	`position` Position in content.

Constructor Summary

Constructors
Modifier Constructor and Description

protected Scanner(String content, int line, int start, int length)
Constructor

Constructors
Modifier	Constructor and Description
`protected`	`Scanner(String content, int line, int start, int length)` Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected boolean`	`atEOF()` Returns true of scanner is at end of input
`protected char`	`charAt(int i)` Get the ith character from the content.
`protected void`	`reset(int i)` Reset to a character position.
`protected void`	`skip(int n)` Skip ahead a number of characters.

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - content
```
protected final String content
```
    Characters to scan.
  - position
```
protected int position
```
    Position in content.
  - limit
```
protected final int limit
```
    Scan limit.
  - line
```
protected int line
```
    Current line number.
  - ch0
```
protected char ch0
```
    Current character in stream
  - ch1
```
protected char ch1
```
    1 character lookahead
  - ch2
```
protected char ch2
```
    2 character lookahead
  - ch3
```
protected char ch3
```
    3 character lookahead
- Constructor Detail
  - Scanner
```
protected Scanner(String content,
                  int line,
                  int start,
                  int length)
```
    Constructor
    
    Parameters:
    
    content - content to scan
    
    line - start line number
    
    start - position index in content where to start
    
    length - length of input
- Method Detail
  - atEOF
```
protected final boolean atEOF()
```
    Returns true of scanner is at end of input
    
    Returns:
    
    true if no more input
  - charAt
```
protected final char charAt(int i)
```
    Get the ith character from the content.
    
    Parameters:
    
    i - Index of character.
    
    Returns:
    
    ith character or '\0' if beyond limit.
  - reset
```
protected final void reset(int i)
```
    Reset to a character position.
    
    Parameters:
    
    i - Position in content.
  - skip
```
protected final void skip(int n)
```
    Skip ahead a number of characters.
    
    Parameters:
    
    n - Number of characters to skip.

Class Scanner

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

content

position

limit

line

ch0

ch1

ch2

ch3

Constructor Detail

Scanner

Method Detail

atEOF

charAt

reset

skip