emulib.plugins.compiler

Interface LexicalAnalyzer

public interface LexicalAnalyzer

Interface that implements lexical analyzer

Method Summary

Modifier and Type	Method and Description
Token	getSymbol() Gets next lexical symbol from source code, from actual position.
void	reset() Performs reset of the analyzer.
void	reset(Reader sourceCode, int startLine, int startChar, int startColumn) Performs reset of the analyzer.

Method Detail

reset

void reset()

Performs reset of the analyzer. Internal counters (actual position, actual column, row, etc.) should be cleared. Lexical analyzer should prepare itself to start parsing from the beginning of the document.

reset

void reset(Reader sourceCode,
           int startLine,
           int startChar,
           int startColumn)

Performs reset of the analyzer. Internal counters (actual position, actual column, row, etc.) should be cleared. Lexical analyzer should prepare itself to start parsing from the beginning of the document.

Parameters:

sourceCode - Reader of the source code.

startLine - from this line should lexical analyzer start, usually 0

startChar - from this char should lexical analyzer start, usually 0

startColumn - from this column should lexical analyzer start, usually 0

getSymbol

Token getSymbol()
         throws IOException

Gets next lexical symbol from source code, from actual position. This is real implementation of lexical analyzer. After this call it should increase internal counters to next unread text (actual position, actual row, column, etc.)

Returns:

next found token

Throws:

IOException - is thrown when the token could not be read