/// <summary>
/// Парсер даты и строк.
/// </summary>
/// <param name="iterator"></param>
/// <param name="token"></param>
/// <returns></returns>
public bool Parse(SourceIterator iterator, out IToken token)
{
token = null;
string content = string.Empty;
CodeInformation information = iterator.CodeInformation.Clone();
if (ParseDate(iterator, out content))
{
token = new TokenClass()
{
Content = content,
CodeInformation = information,
Type = TokenTypeEnum.LITERAL,
SubType = TokenSubTypeEnum.L_DATE
};
return(true);
}
if (ParseString(iterator, out content))
{
token = new TokenClass()
{
Content = content,
CodeInformation = information,
Type = TokenTypeEnum.LITERAL,
SubType = TokenSubTypeEnum.L_STRING
};
return(true);
}
return(false);
}
public bool Parse(SourceIterator iterator, out IToken token)
{
token = null;
string content = string.Empty;
TokenSubTypeEnum subtype;
if (Char.IsLetter(iterator.Current) || iterator.Current == '_')
{
CodeInformation information = iterator.CodeInformation.Clone();
content = iterator.GetLettersAndDigits();
if (!_table.TryGetValue(content, out subtype))
{
subtype = TokenSubTypeEnum.NA;
}
token = new TokenClass()
{
Content = content,
CodeInformation = information,
Type = TokenTypeEnum.IDENTIFIER,
SubType = subtype
};
return(true);
}
return(false);
}
/// <summary>
/// Парсинг даты.
/// </summary>
/// <param name="iterator"></param>
/// <param name="date"></param>
/// <returns></returns>
private bool ParseDate(SourceIterator iterator, out string date)
{
CodeInformation information;
date = string.Empty;
if (iterator.Current == '\'')
{
information = iterator.CodeInformation.Clone();
do
{
if (Char.IsNumber(iterator.Current))
{
date += iterator.Current;
}
if (iterator.Current == '\'' && iterator.CodeInformation.ColumnNumber != information.ColumnNumber)
{
iterator.MoveNext();
break;
}
}while (iterator.MoveNext());
if (date.Length > 14)
{
throw new CompilerException(information, "Дата не может быть длинной более 14 символов.");
}
return(true);
}
return(false);
}
/// <summary>
/// Парсинг текстовой строки в кавычках ""
/// </summary>
/// <param name="iterator"></param>
/// <param name="str"></param>
/// <returns></returns>
private bool ParseString(SourceIterator iterator, out string str)
{
str = string.Empty;
if (iterator.Current == '"')
{
str = iterator.GetString();
return(true);
}
return(false);
}
public ParserClass(string module_name, string module_src)
{
_iterator = new SourceIterator(module_name, module_src);
_factory = new TokenParserFactory();
_iterator.MoveNext();
_factory.Add(TokenTypeEnum.IDENTIFIER, new IdentifierTokenParser());
_factory.Add(TokenTypeEnum.LITERAL, new LiteralTokenParser());
_factory.Add(TokenTypeEnum.PUNCTUATION, new PunctuationTokenParser());
_factory.Add(TokenTypeEnum.NUMBER, new NumberTokenParser());
}
public bool Parse(SourceIterator iterator, out IToken token)
{
token = null;
string content = string.Empty;
if (Char.IsNumber(iterator.Current))
{
CodeInformation information = iterator.CodeInformation.Clone();
content = iterator.GetDigits();
token = new TokenClass()
{
Content = content,
CodeInformation = information,
Type = TokenTypeEnum.NUMBER
};
return(true);
}
return(false);
}
public bool Parse(SourceIterator iterator, out IToken token)
{
token = null;
string content = string.Empty;
TokenSubTypeEnum subtype;
if (_punctuation_table.TryGetValue(iterator.Current.ToString(), out subtype))
{
char forward_symbol;
CodeInformation information = iterator.CodeInformation.Clone();
forward_symbol = iterator.GetForwardSymbol();
content += iterator.Current;
if ((forward_symbol == '>' || forward_symbol == '=') && (iterator.Current == '<' || iterator.Current == '>'))
{
content = iterator.Current + forward_symbol.ToString();
_punctuation_table.TryGetValue(content, out subtype);
iterator.MoveNext();
}
iterator.MoveNext();
token = new TokenClass()
{
Content = content,
CodeInformation = information,
Type = TokenTypeEnum.PUNCTUATION,
SubType = subtype
};
return(true);
}
else
{
return(false);
}
}
