IScanner

Description

The IScanner interface defines a scanner that can read and unread characters and count lines.

Instance methods

Column

Gets the column in the current line.

int Column()

• returns: int - column in the current line in the stream.

Line

Gets the current line number

int Line()

• returns: int - current line number in the stream

Peek

Returns the character from the top of the stream without moving the stream pointer.

char Peek()

• returns: char - character from the top of the stream or -1 if the stream is empty.

PeekColumn

Gets the next character column number.

int PeekColumn()

• returns: int - next character column number in the stream.

PeekLine

Gets the next character line number.

int PeekLine()

• returns: int - next character line number in the stream.

Read

Reads a character from the top of the stream.

char Read()

• returns: char - read character or -1 if the stream is processed to the end.

Reset

Resets a scanner to the initial position.

void Reset()

Unread

Puts a character back into the stream.

void Unread()

UnreadMany

Pushes the specified number of characters to the top of the stream.

void UnreadMany(int count)

• count: int - number of characcted to be pushed back.