Package org.oristool.lello.parse

Class LelloLexer

java.lang.Object

org.oristool.lello.parse.LelloLexer

public class LelloLexer
extends Object

Lello lexical analyzer (lexer).

This class is responsible for reading a string representing an expression and breaking it up in terminal symbols.

Constructor Summary

Constructors

Constructor	Description
LelloLexer()	Initializes Lello lexical analyzer.

Method Summary

Modifier and Type	Method	Description
List<Terminal>	lex(String s)	Analyzes a string.
static void	validateName(String n)	Checkes whether a string is a valid identifier.

Methods inherited from class java.lang.Object

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

Constructor Details

LelloLexer

public LelloLexer()

Initializes Lello lexical analyzer.

Method Details

lex

public List<Terminal> lex(String s)

Analyzes a string.

Parameters:

s - The string to be analyzed.

Returns:

The terminal symbols that make up the string.

validateName

public static void validateName(String n)

Checkes whether a string is a valid identifier. If it is not an exception will be thrown.

Parameters:

n - The string to be tested.