public void BuildIdentificator(OutputRow row)
{
string lex = row.Name;
foreach (IdentificatorRow idRow in IdentificatorTable)
{
if (idRow.Name.CompareTo(lex) == 0)
{
row.Index = idRow.Index;
return;
}
}
foreach (OutputRow oRow in OutputTable)
{
if (oRow.Name.CompareTo("begin") == 0)
{
throw new LexicException("Error: неоголошений ідентифікатор '" + lex + "', рядок " + line);
}
}
IdentificatorRow idRow2 = new IdentificatorRow()
{
Name = lex,
Index = IdentificatorTable.Count + 1,
Value = "0"
};
IdentificatorTable.Add(idRow2);
row.Index = idRow2.Index;
}
public void BuildConstant(OutputRow row)
{
string lex = row.Name;
foreach (ConstantRow idRow in ConstantTable)
{
if (idRow.Name.CompareTo(lex) == 0)
{
row.Index = idRow.Index;
return;
}
}
ConstantRow idRow2 = new ConstantRow()
{
Name = lex, Index = ConstantTable.Count + 1
};
ConstantTable.Add(idRow2);
row.Index = idRow2.Index;
}
public void Recognise(OutputRow row)
{
string lex = row.Name;
LexemRow lRow;
for (int i = 0; i < LexemTable.Count - 3; i++)
{
lRow = LexemTable[i];
if (lex.CompareTo(lRow.Name) == 0)
{
row.Id = lRow.Id;
break;
}
}
if (row.Id == 0)
{
row.Id = RecogniseId(row);
}
}
public int RecogniseId(OutputRow row)
{
string lex = row.Name;
string identificatorPattern = "^[a-z][a-z0-9]*$";
if (System.Text.RegularExpressions.Regex.IsMatch(lex, identificatorPattern))
{
BuildIdentificator(row);
return(LexemTable[35].Id);
}
string constantPattern = "^(?(\\d+)\\d+\\.?\\d*|\\.\\d+)(E[-+]?\\d+)?$";
if (System.Text.RegularExpressions.Regex.IsMatch(lex, constantPattern))
{
BuildConstant(row);
return(LexemTable[36].Id);
}
throw new LexicException("Error: неправльнй формат константи '" + lex + "', рядок " + line);
//return 0;
}
public void Build()
{
line = 1;
//int position = 1;
string lex = "";
OutputTable = new List <OutputRow>();
IdentificatorTable = new List <IdentificatorRow>();
ConstantTable = new List <ConstantRow>();
OutputRow oRow;
for (int i = 0; i < Source.Length; i++)
{
if (IsSplitter(i) != true)
{
if (IsSymbole(i) == true)
{
lex += Source[i];
}
else
{
throw new LexicException("Error: недопустимий символ '" + Source[i] + "', рядок " + line);
}
}
else
{
if (lex != "")
{
oRow = new OutputRow()
{
Line = line, Name = lex
};
Recognise(oRow);
OutputTable.Add(oRow);
}
lex = Source[i].ToString();
if (IsSpace(i) == true)
{
lex = "";
continue;
}
if ((i + 1 < Source.Length) && (IsEqualSplitter(i + 1) == true) && (IsLogicSplitter(i + 1) == true))
{
oRow = new OutputRow()
{
Line = line, Name = lex + Source[i + 1]
};
Recognise(oRow);
OutputTable.Add(oRow);
lex = "";
i++;
}
else
{
if (lex.CompareTo("!") == 0)
{
throw new LexicException("Error: недопустимий оператор '!'");
}
oRow = new OutputRow()
{
Line = line, Name = lex
};
Recognise(oRow);
OutputTable.Add(oRow);
if (Source[i] == '\n')
{
line++;
}
lex = "";
}
}
}
OutputTable.RemoveAt(OutputTable.Count - 1);
}
