edu.jmu.decaf

Class MyDecafLexer

java.lang.Object

edu.jmu.decaf.DecafLexer

edu.jmu.decaf.MyDecafLexer

class MyDecafLexer
extends DecafLexer

Concrete Decaf lexer class.

Constructor Summary

Constructors

Constructor and Description
MyDecafLexer()

Method Summary

Modifier and Type	Method and Description
Queue<Token>	lex(BufferedReader input, String filename) Perform lexical analysis, converting Decaf source code into a stream of Token objects.

Methods inherited from class edu.jmu.decaf.DecafLexer

addIgnoredPattern, addTokenPattern, discardIgnored, extract, getLastMatch, lex, lex, lex, nextToken

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MyDecafLexer

MyDecafLexer()

Method Detail

lex

public Queue<Token> lex(BufferedReader input,
                        String filename)
                 throws IOException,
                        InvalidTokenException

Perform lexical analysis, converting Decaf source code into a stream of Token objects.

Overrides:

lex in class DecafLexer

Parameters:

input - Input text reader

filename - Source file name (for source info)

Returns:

Queue of lexed tokens

Throws:

IOException - Thrown if there is an error reading from the input

InvalidTokenException - Thrown if an invalid token is encountered