public override Lexem ReadNextLexem(ParseIterator iterator)
{
bool hasDecimalPoint = false;
while (true)
{
if (Char.IsDigit(iterator.CurrentSymbol))
{
if (!iterator.MoveNext())
{
var lex = new Lexem()
{
Type = LexemType.NumberLiteral,
Content = iterator.GetContents().content
};
return(lex);
}
}
else if (SpecialChars.IsDelimiter(iterator.CurrentSymbol))
{
if (iterator.CurrentSymbol == '.')
{
if (!hasDecimalPoint)
{
hasDecimalPoint = true;
iterator.MoveNext();
continue;
}
else
{
throw CreateExceptionOnCurrentLine("Некорректно указана десятичная точка в числе", iterator);
}
}
var lex = new Lexem()
{
Type = LexemType.NumberLiteral,
Content = iterator.GetContents().content
};
return(lex);
}
else
{
throw CreateExceptionOnCurrentLine("Некорректный символ", iterator);
}
}
}
public Lexem NextLexem()
{
_state = _emptyState;
while (true)
{
if (_iterator.MoveToContent())
{
char cs = _iterator.CurrentSymbol;
if (Char.IsLetter(cs) || cs == '_')
{
_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 = _operatorState;
}
else if (cs == SpecialChars.EndOperator)
{
_iterator.MoveNext();
return(new Lexem()
{
Type = LexemType.EndOperator, Token = Token.Semicolon
});
}
else if (cs == '?')
{
_iterator.MoveNext();
return(new Lexem()
{
Type = LexemType.Identifier, Token = Token.Question
});
}
else if (cs == SpecialChars.Directive)
{
_state = _directiveState;
}
else
{
var cp = _iterator.GetPositionInfo(_iterator.CurrentLine);
throw new ParserException(cp, string.Format("Неизвестный символ {0}", cs));
}
var lex = _state.ReadNextLexem(_iterator);
if (lex.Type == LexemType.NotALexem)
{
_state = _emptyState;
continue;
}
return(lex);
}
else
{
return(Lexem.EndOfText());
}
}
}
public override Lexem ReadNextLexem(ParseIterator iterator)
{
bool isEndOfText = false;
Char cs = '\0';
while (true)
{
if (!isEndOfText)
{
cs = iterator.CurrentSymbol;
}
if (SpecialChars.IsDelimiter(cs) || isEndOfText)
{
var content = iterator.GetContents().content;
Lexem lex;
if (_booleanOperators.Contains(content))
{
lex = new Lexem()
{
Type = LexemType.Operator,
Token = LanguageDef.GetToken(content),
Content = content
};
}
else if (_booleanLiterals.Contains(content))
{
lex = new Lexem()
{
Type = LexemType.BooleanLiteral,
Content = content
};
}
else if (_undefined.Contains(content))
{
lex = new Lexem()
{
Type = LexemType.UndefinedLiteral,
Content = content
};
}
else if (String.Compare(content, "null", true) == 0)
{
lex = new Lexem()
{
Type = LexemType.NullLiteral,
Content = content
};
}
else
{
lex = new Lexem()
{
Type = LexemType.Identifier,
Content = content,
Token = LanguageDef.GetToken(content)
};
if (LanguageDef.IsBuiltInFunction(lex.Token))
{
iterator.SkipSpaces();
if (iterator.CurrentSymbol != '(')
{
lex.Token = Token.NotAToken;
}
}
}
return(lex);
}
if (!iterator.MoveNext())
{
if (isEndOfText)
{
break;
}
else
{
isEndOfText = true;
}
}
}
return(Lexem.Empty());
}
