protected void loadNextTokenFromInput()
{
bool eoiEncountered = false;
for (int i = 0; i < LookAhead - 1; i++)
{
lookAheadBuffer[i] = lookAheadBuffer[i + 1];
if (isEndOfInput(lookAheadBuffer[i]))
{
eoiEncountered = true;
break;
}
}
if (!eoiEncountered)
{
try
{
lookAheadBuffer[LookAhead - 1] = lexer.nextToken();
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
}
public void testLexBasicExpression()
{
lexer.setInput("( P )");
Assert.AreEqual(new Token(LogicTokenTypes.LPAREN, "(", 0),
lexer.nextToken());
Assert.AreEqual(new Token(LogicTokenTypes.CONSTANT, "P", 2),
lexer.nextToken());
Assert.AreEqual(new Token(LogicTokenTypes.RPAREN, ")", 4),
lexer.nextToken());
Assert.AreEqual(new Token(LogicTokenTypes.EOI, "EOI", 5),
lexer.nextToken());
}