IScanner (pip-services3-expressions 3.0.0 API)

All Known Implementing Classes:

StringScanner
```
public interface IScanner
```
Defines scanner that can read and unread characters and count lines. This scanner is used by tokenizers to process input streams.

Method Summary

Modifier and Type	Method	Description
`int`	`column()`	Gets the column in the current line
`int`	`line()`	Gets the current line number
`int`	`peek()`	Returns the character from the top of the stream without moving the stream pointer.
`int`	`peekColumn()`	Gets the next character column number
`int`	`peekLine()`	Gets the next character line number
`int`	`read()`	Reads character from the top of the stream.
`void`	`reset()`	Resets scanner to the initial position
`void`	`unread()`	Puts the one character back into the stream stream.
`void`	`unreadMany(int count)`	Pushes the specified number of characters to the top of the stream.

- Method Detail
  - read
```
int read()
```
    Reads character from the top of the stream.
    
    Returns:
    
    A read character or -1 if stream processed to the end.
  - line
```
int line()
```
    Gets the current line number
    
    Returns:
    
    The current line number in the stream
  - column
```
int column()
```
    Gets the column in the current line
    
    Returns:
    
    The column in the current line in the stream
  - peek
```
int peek()
```
    Returns the character from the top of the stream without moving the stream pointer.
    
    Returns:
    
    A character from the top of the stream or -1 if stream is empty.
  - peekLine
```
int peekLine()
```
    Gets the next character line number
    
    Returns:
    
    The next character line number in the stream
  - peekColumn
```
int peekColumn()
```
    Gets the next character column number
    
    Returns:
    
    The next character column number in the stream
  - unread
```
void unread()
```
    Puts the one character back into the stream stream.
  - unreadMany
```
void unreadMany(int count)
```
    Pushes the specified number of characters to the top of the stream.
    
    Parameters:
    
    count - A number of characcted to be pushed back.
  - reset
```
void reset()
```
    Resets scanner to the initial position