public override Lexem ReadNextLexem(SourceCodeIterator iterator)
{
bool hasDecimalPoint = false;
while (true)
{
if (Char.IsDigit(iterator.CurrentSymbol))
{
if (!iterator.MoveNext())
{
var lex = new Lexem()
{
Type = LexemType.NumberLiteral,
Content = iterator.GetContents()
};
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()
};
return(lex);
}
else
{
throw CreateExceptionOnCurrentLine("Некорректный символ", iterator);
}
}
}
public override Lexem ReadNextLexem(SourceCodeIterator iterator)
{
bool isEndOfText = false;
char cs = '\0';
int currentLine = iterator.CurrentLine;
while (true)
{
if (!isEndOfText)
{
cs = iterator.CurrentSymbol;
}
if (SpecialChars.IsDelimiter(cs) || isEndOfText)
{
var content = iterator.GetContents();
Lexem lex;
if (LanguageDef.IsLogicalOperatorString(content))
{
lex = new Lexem()
{
Type = LexemType.Operator,
Token = LanguageDef.GetToken(content),
Content = content,
LineNumber = currentLine
};
}
else if (LanguageDef.IsBooleanLiteralString(content))
{
lex = new Lexem()
{
Type = LexemType.BooleanLiteral,
Content = content,
LineNumber = currentLine
};
}
else if (LanguageDef.IsUndefinedString(content))
{
lex = new Lexem()
{
Type = LexemType.UndefinedLiteral,
Content = content,
LineNumber = currentLine
};
}
else if (LanguageDef.IsNullString(content))
{
lex = new Lexem()
{
Type = LexemType.NullLiteral,
Content = content,
LineNumber = currentLine
};
}
else
{
lex = new Lexem()
{
Type = LexemType.Identifier,
Content = content,
Token = LanguageDef.GetToken(content),
LineNumber = currentLine
};
if (LanguageDef.IsBuiltInFunction(lex.Token))
{
iterator.SkipSpaces();
if (iterator.CurrentSymbol != '(')
{
lex.Token = Token.NotAToken;
}
}
}
return(lex);
}
if (!iterator.MoveNext())
{
isEndOfText = true;
}
}
}