private LexerState SelectState()
{
char cs = _iterator.CurrentSymbol;
if (Char.IsLetter(cs) || cs == SpecialChars.Underscore)
{
_state = _wordState;
}
else if (Char.IsDigit(cs))
{
_state = _numberState;
}
else if (cs == SpecialChars.DateQuote)
{
_state = _dateState;
}
else if (cs == SpecialChars.StringQuote)
{
_state = _stringState;
}
else if (SpecialChars.IsOperatorChar(cs))
{
_state = CommentOrOperatorState(cs);
}
else if (cs == SpecialChars.EndOperator)
{
SetFixedState(LexemType.EndOperator, Token.Semicolon);
}
else if (cs == SpecialChars.QuestionMark)
{
SetFixedState(LexemType.Operator, Token.Question);
}
else if (cs == SpecialChars.Preprocessor)
{
_state = _directiveState;
}
else if (cs == SpecialChars.Annotation)
{
_iterator.GetContents();
_iterator.MoveNext();
_state = _annotationState;
}
else
{
var cp = _iterator.GetPositionInfo();
var exc = new SyntaxErrorException(cp, string.Format("Неизвестный символ {0}", cs));
if (!HandleError(exc))
{
throw exc;
}
}
return(_state);
}
public void Special_Characters()
{
Assert.True(SpecialChars.IsOperatorChar('+'));
Assert.True(SpecialChars.IsOperatorChar('-'));
Assert.True(SpecialChars.IsOperatorChar('*'));
Assert.True(SpecialChars.IsOperatorChar('/'));
Assert.True(SpecialChars.IsOperatorChar('<'));
Assert.True(SpecialChars.IsOperatorChar('>'));
Assert.True(SpecialChars.IsOperatorChar('='));
Assert.True(SpecialChars.IsOperatorChar('%'));
Assert.True(SpecialChars.IsOperatorChar('('));
Assert.True(SpecialChars.IsOperatorChar(')'));
Assert.True(SpecialChars.IsOperatorChar('.'));
Assert.True(SpecialChars.IsOperatorChar(','));
Assert.True(SpecialChars.IsOperatorChar('['));
Assert.True(SpecialChars.IsOperatorChar(']'));
}