private IntermediateCode PaParseDestructor()
{
Error Error = new Error();
IntermediateCode IC = new IntermediateCode();
ICMethodDeclaration MD = new ICMethodDeclaration();
MD.LineNumber = PaLexemeStream[PaPositionEnd].LineNumber;
// PaPositionEnd -> ~
PaPositionEnd += 1;
// Assert the next lexeme is an id
if (PaPositionEnd == PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.ID)
{
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The name of the class is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
MD.Type = 6;
MD.TypeName = (string)PaLexemeStream[PaPositionEnd].Value;
PaPositionEnd += 1;
// Destructor does not have parameters
if (PaPositionEnd + 1 >= PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.LEFT_BRACKET || PaLexemeStream[PaPositionEnd + 1].Type != LexemeType.RIGHT_BRACKET)
{
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "\"()\" expected and no parameter allowed for a destructor.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
PaPositionEnd += 2;
// Assert the next lexeme is a code block
if (PaPositionEnd >= PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.CODE_BLOCK)
{
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The definition of the destructor is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
Scanner ScanMethodContents = new Scanner((string)PaLexemeStream[PaPositionEnd].Value);
ScanMethodContents.ScSetInitialLineCount(PaLexemeStream[PaPositionEnd].LineNumber);
Parser ParseMethodContents = new Parser(ScanMethodContents.ScScan());
MD.Definition = ParseMethodContents.PaParse();
PaPositionEnd += 1; // PaPositionEnd += 1 -> STATEMENT_END_MARK
IC.StatementContent = MD;
IC.Type = ICStatementType.DESTRUCTOR_DECLARATION;
return(IC);
}
private IntermediateCode PaParseReturn()
{
IntermediateCode IC = new IntermediateCode();
Error Error = new Error();
PaPositionNow = PaPositionEnd;
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
PaPositionNow += 1;
if (PaPositionNow < PaPositionEnd)
{
IC.StatementContent = PaParseCommonExpression(PaPositionNow, PaPositionEnd);
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Expect a return expression.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (PaStopParsing)
{
return(IC);
}
IC.Type = ICStatementType.RETURN;
return(IC);
}
private IntermediateCode PaParseCodeBlock(int Position)
{
Scanner CodeBlockScanner = new Scanner((string)PaLexemeStream[Position].Value);
CodeBlockScanner.ScSetInitialLineCount(PaLexemeStream[Position].LineNumber);
Parser CodeBlockParser = new Parser(CodeBlockScanner.ScScan());
IntermediateCode IC = new IntermediateCode();
IC.StatementContent = CodeBlockParser.PaParse();
IC.Type = ICStatementType.CODE_BLOCK;
return(IC);
}
/// <summary>
/// A reference based expression parser
/// </summary>
/// <param name="StartPoint">Parser from.</param>
/// <param name="EndPoint">Parse ends at. Usually ";", ")"</param>
/// <returns></returns>
public IntermediateCode PaParseCommonExpression(int StartPoint, int EndPoint)
{
///////////////////////////////////////////
//
// Should parse until PaPositionEnd - 1
// as PaPositionEnd points to ';' or ')'
// or some other stuff like that.
//
///////////////////////////////////////////
//
// Shutting-yard Algorithm
//
///////////////////////////////////////////
Error Error = new Error();
IntermediateCode IC = new IntermediateCode();
IC.Type = ICStatementType.EXPRESSION;
Stack <Lexeme> OperatorStack = new Stack <Lexeme>();
Stack <ICExpression> OutputStack = new Stack <ICExpression>();
Stack <bool> BracketIfFunction = new Stack <bool>();
#region Shutting-Yard Body
int LastPosition = -1;
for (; StartPoint < EndPoint; StartPoint++)
{
ICExpression ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand1 = null;
ExpNow.Operand2 = null;
ExpNow.LValueName = null;
switch (PaLexemeStream[StartPoint].Type)
{
// Values
case LexemeType.CHAR_VALUE:
ExpNow.Value = PaLexemeStream[StartPoint].Value;
ExpNow.Operator = Operators.CHAR_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
case LexemeType.FLOAT_VALUE:
ExpNow.Value = PaLexemeStream[StartPoint].Value;
ExpNow.Operator = Operators.FLOAT_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
case LexemeType.INT_VALUE:
ExpNow.Value = PaLexemeStream[StartPoint].Value;
ExpNow.Operator = Operators.INT_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
case LexemeType.STRING_VALUE:
ExpNow.Value = PaLexemeStream[StartPoint].Value;
ExpNow.Operator = Operators.STRING_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
case LexemeType.TRUE:
ExpNow.Value = true;
ExpNow.Operator = Operators.BOOL_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
case LexemeType.FALSE:
ExpNow.Value = false;
ExpNow.Operator = Operators.BOOL_VALUE;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
// ID -> 1. Variable. 2. Function. 3. Type cast
case LexemeType.ID:
ExpNow.Value = PaLexemeStream[StartPoint].Value;
ExpNow.Operator = Operators.ID;
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
// Array
case LexemeType.LEFT_SQUARE_BRACKET:
OperatorStack.Push(PaLexemeStream[StartPoint]);
LastPosition = StartPoint;
break;
case LexemeType.RIGHT_SQUARE_BRACKET:
if (OperatorStack.Peek().Type == LexemeType.RIGHT_SQUARE_BRACKET)
{
ExpNow.Operator = Operators.ARRAY;
OutputStack.Push(ExpNow);
OperatorStack.Pop();
LastPosition = StartPoint;
break;
}
while (OperatorStack.Count > 0 && OperatorStack.Peek().Type != LexemeType.LEFT_SQUARE_BRACKET)
{
if (OperatorStack.Peek().OperatorPriority > 2)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
if ((Operators)OperatorStack.Peek().Value == Operators.TYPE_CAST)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (OutputStack.Count >= 1)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operand2 = null;
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
OutputStack.Push(ExpNow);
}
if (OperatorStack.Count == 0)
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"]\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
OperatorStack.Pop();
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operator = Operators.ARRAY;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
OutputStack.Push(ExpNow);
LastPosition = StartPoint;
break;
// Operators
case LexemeType.LV1_OPERATOR:
// case LexemeType.LV2_OPERATOR:
case LexemeType.LV3_OPERATOR:
case LexemeType.LV4_OPERATOR:
case LexemeType.LV5_OPERATOR:
case LexemeType.LV6_OPERATOR:
case LexemeType.LV7_OPERATOR:
case LexemeType.LV8_OPERATOR:
case LexemeType.LV10_OPERATOR:
while (OperatorStack.Count > 0 && OperatorStack.Peek().OperatorPriority <= PaLexemeStream[StartPoint].OperatorPriority)
{
if (OperatorStack.Peek().OperatorPriority > 2)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
if ((Operators)OperatorStack.Peek().Value == Operators.TYPE_CAST || (Operators)OperatorStack.Peek().Value == Operators.GET_CHILD)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (OutputStack.Count >= 1)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operand2 = null;
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
OutputStack.Push(ExpNow);
}
OperatorStack.Push(PaLexemeStream[StartPoint]);
LastPosition = StartPoint;
break;
case LexemeType.LV9_OPERATOR:
case LexemeType.LV2_OPERATOR:
while (OperatorStack.Count > 0 && OperatorStack.Peek().OperatorPriority < PaLexemeStream[StartPoint].OperatorPriority)
{
if (OperatorStack.Peek().OperatorPriority > 2)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
if ((Operators)OperatorStack.Peek().Value == Operators.TYPE_CAST || (Operators)OperatorStack.Peek().Value == Operators.GET_CHILD)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (OutputStack.Count >= 1)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operand2 = null;
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
OutputStack.Push(ExpNow);
}
OperatorStack.Push(PaLexemeStream[StartPoint]);
LastPosition = StartPoint;
break;
case LexemeType.LEFT_BRACKET:
if (LastPosition >= 0 && PaLexemeStream[LastPosition].Type == LexemeType.ID)
{
BracketIfFunction.Push(true);
}
else
{
BracketIfFunction.Push(false);
}
OperatorStack.Push(PaLexemeStream[StartPoint]);
LastPosition = StartPoint;
break;
case LexemeType.RIGHT_BRACKET:
if (LastPosition > 0 && PaLexemeStream[LastPosition].Type == LexemeType.LEFT_BRACKET)
{
if (BracketIfFunction.Pop())
{
ExpNow.Operator = Operators.FUNCTION_CALL;
ExpNow.Operand2 = null;
ExpNow.Operand1 = OutputStack.Pop();
OutputStack.Push(ExpNow);
OperatorStack.Pop();
LastPosition = StartPoint;
break;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \")\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
while (OperatorStack.Count > 0 && OperatorStack.Peek().Type != LexemeType.LEFT_BRACKET)
{
if (OperatorStack.Peek().OperatorPriority > 2)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
if ((Operators)OperatorStack.Peek().Value == Operators.TYPE_CAST || (Operators)OperatorStack.Peek().Value == Operators.GET_CHILD)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = ExpNow.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (OutputStack.Count >= 1)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operand2 = null;
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
OutputStack.Push(ExpNow);
}
if (OperatorStack.Count == 0)
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \")\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
OperatorStack.Pop();
if (BracketIfFunction.Pop())
{
ExpNow = new ICExpression();
ExpNow.LineNumber = PaLexemeStream[StartPoint].LineNumber;
ExpNow.Operator = Operators.FUNCTION_CALL;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
OutputStack.Push(ExpNow);
}
else if (StartPoint + 1 < PaLexemeStream.Count &&
(PaLexemeStream[StartPoint + 1].Type != LexemeType.LV1_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV2_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV3_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV4_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV5_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV6_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV7_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV8_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV9_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.LV10_OPERATOR &&
PaLexemeStream[StartPoint + 1].Type != LexemeType.STATEMENT_END_MARK
))
{
Lexeme TypeCast = new Lexeme();
TypeCast.LineNumber = PaLexemeStream[StartPoint].LineNumber;
TypeCast.Type = LexemeType.LV2_OPERATOR;
TypeCast.OperatorPriority = 2;
TypeCast.Value = Operators.TYPE_CAST;
OperatorStack.Push(TypeCast);
}
LastPosition = StartPoint;
break;
case LexemeType.CODE_BLOCK:
// Can and can only return an array
Scanner CodeBlockScanner = new Scanner((string)PaLexemeStream[StartPoint].Value);
CodeBlockScanner.ScSetInitialLineCount(PaLexemeStream[StartPoint].LineNumber);
List <Lexeme> ScannedCodeBlock = CodeBlockScanner.ScScan();
Parser CodeBlockParser = new Parser(ScannedCodeBlock);
OutputStack.Push((ICExpression)CodeBlockParser.PaParseCommonExpression(0, ScannedCodeBlock.Count).StatementContent);
if (PaStopParsing)
{
return(IC);
}
LastPosition = StartPoint;
break;
case LexemeType.STATEMENT_END_MARK:
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpeted \";\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
default:
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpeted \"" + PaLexemeStream[StartPoint].Type.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
#endregion Shutting-Yard Body
while (OperatorStack.Count > 0)
{
ICExpression ExpNow = new ICExpression();
if (OperatorStack.Peek().OperatorPriority > 2)
{
if (OutputStack.Count >= 2)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = OperatorStack.Peek().LineNumber;
ExpNow.Operand2 = OutputStack.Pop();
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = OperatorStack.Peek().LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (OperatorStack.Peek().Type == LexemeType.LEFT_BRACKET)
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"(\".";
Error.LineNo = OperatorStack.Peek().LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else if (OperatorStack.Peek().Type == LexemeType.LEFT_SQUARE_BRACKET)
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"[\".";
Error.LineNo = OperatorStack.Peek().LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else
{
if (OutputStack.Count >= 1)
{
ExpNow = new ICExpression();
ExpNow.LineNumber = OperatorStack.Peek().LineNumber;
ExpNow.Operand1 = OutputStack.Pop();
ExpNow.Operand2 = null;
ExpNow.Operator = (Operators)OperatorStack.Pop().Value;
}
else
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "Unexpected \"" + PaLexemeStream[StartPoint].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[StartPoint].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
OutputStack.Push(ExpNow);
}
if (OutputStack.Count > 1)
{
Error.ID = ErrorID.C0012;
Error.ErrorDetail = "\";\" expected.";
Error.LineNo = OutputStack.Peek().LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else if (OutputStack.Count == 0)
{
return(IC);
}
else
{
IC.StatementContent = OutputStack.Pop();
}
return(IC);
}
private IntermediateCode PaParseTry()
{
IntermediateCode IC = new IntermediateCode();
IC.Type = ICStatementType.TRY_STATEMENT;
ICTryStatement TS = new ICTryStatement();
TS.LineNumber = PaLexemeStream[PaPositionEnd].LineNumber;
Error Error = new Error();
// PaPositionEnd -> try
PaPositionNow = ++PaPositionEnd;
if (PaPositionEnd == PaLexemeStream.Count)
{
Error.ID = ErrorID.C0011;
Error.ErrorDetail = "\";\" expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
switch (PaLexemeStream[PaPositionNow].Type)
{
case LexemeType.ID:
int IDStart = PaPositionNow;
PaPositionNow += 1;
if (PaLexemeStream[PaPositionNow].Type == LexemeType.LV1_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV2_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV3_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV4_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV5_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV6_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV7_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV8_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV9_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV10_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_BRACKET)
{
PaPositionEnd = PaPositionNow;
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
TS.Statements = PaParseCommonExpression(IDStart, PaPositionEnd);
break;
}
else
{
Error.ID = ErrorID.C0011;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
case LexemeType.CHAR_VALUE:
case LexemeType.FLOAT_VALUE:
case LexemeType.INT_VALUE:
case LexemeType.LV2_OPERATOR:
case LexemeType.NEW:
case LexemeType.STRING_VALUE:
case LexemeType.TRUE:
case LexemeType.FALSE:
case LexemeType.LEFT_BRACKET:
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
TS.Statements = PaParseCommonExpression(PaPositionNow, PaPositionEnd);
break;
case LexemeType.CODE_BLOCK:
TS.Statements = PaParseCodeBlock(PaPositionNow);
PaPositionNow += 1;
PaPositionEnd = PaPositionNow;
break;
case LexemeType.IF:
TS.Statements = PaParseIf();
break;
case LexemeType.FOR:
TS.Statements = PaParseFor();
break;
case LexemeType.WHILE:
TS.Statements = PaParseWhile();
break;
case LexemeType.DO:
TS.Statements = PaParseDoWhile();
break;
case LexemeType.TRY:
TS.Statements = PaParseTry();
break;
case LexemeType.STATEMENT_END_MARK:
TS.Statements = new IntermediateCode();;
break;
default:
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
// PaPositionEnd -> STATEMENT_END_MARK
PaPositionEnd += 1;
// Assert the next lexeme must be "catch"
if (PaPositionEnd == PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.CATCH)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "\"catch\" expected.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
List <ICCatchStatement> CSList = new List <ICCatchStatement>();
while (PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type == LexemeType.CATCH)
{
ICCatchStatement CS = new ICCatchStatement();
CS.LineNumber = PaLexemeStream[PaPositionEnd].LineNumber;
PaPositionEnd += 1;
// Assert the next lexeme must be "("
if (PaPositionEnd == PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.LEFT_BRACKET)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "\"(\" expected.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
PaPositionEnd += 1;
PaPositionNow = PaPositionEnd;
for (int BracketCount = 1; BracketCount > 0 && PaPositionEnd < PaLexemeStream.Count; PaPositionEnd++)
{
if (PaLexemeStream[PaPositionEnd].Type == LexemeType.LEFT_BRACKET)
{
BracketCount += 1;
}
else if (PaLexemeStream[PaPositionEnd].Type == LexemeType.RIGHT_BRACKET)
{
BracketCount -= 1;
}
}
PaPositionEnd -= 1;
if (PaPositionEnd >= PaLexemeStream.Count || PaLexemeStream[PaPositionEnd].Type != LexemeType.RIGHT_BRACKET)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "A \")\" is expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
// PaPositionNow -> the lexeme after (, PaPositionEnd -> )
ICVariableDeclaration Exception = new ICVariableDeclaration();
// Assert PaLexemeStream[PaPositionEnd].Type == LexemeType.ID
if (PaPositionNow == PaPositionEnd || PaLexemeStream[PaPositionNow].Type != LexemeType.ID)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "An expection name is expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
Exception.Type = 6;
Exception.TypeName = (string)PaLexemeStream[PaPositionNow].Value;
PaPositionNow += 1;
// Assert PaLexemeStream[PaPositionENd].Type == LexemeType.ID
if (PaPositionNow == PaPositionEnd || PaLexemeStream[PaPositionNow].Type != LexemeType.ID)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "The name of the expection is expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
Exception.Name = (string)PaLexemeStream[PaPositionNow].Value;
CS.Exception = Exception;
if (PaPositionNow + 1 != PaPositionEnd)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "\";\" expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
PaPositionEnd += 1;
// Assert PaLexemeStream still have lexemes
if (PaPositionEnd == PaLexemeStream.Count)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "Statements are expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
PaPositionNow = PaPositionEnd;
switch (PaLexemeStream[PaPositionNow].Type)
{
case LexemeType.ID:
int IDStart = PaPositionNow;
PaPositionNow += 1;
if (PaLexemeStream[PaPositionNow].Type == LexemeType.LV1_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV2_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV3_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV4_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV5_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV6_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV7_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV8_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV9_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV10_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_BRACKET)
{
PaPositionEnd = PaPositionNow;
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
CS.Actions = PaParseCommonExpression(IDStart, PaPositionEnd);
break;
}
else
{
Error.ID = ErrorID.C0011;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
case LexemeType.CHAR_VALUE:
case LexemeType.FLOAT_VALUE:
case LexemeType.INT_VALUE:
case LexemeType.LV2_OPERATOR:
case LexemeType.NEW:
case LexemeType.STRING_VALUE:
case LexemeType.TRUE:
case LexemeType.FALSE:
case LexemeType.LEFT_BRACKET:
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
CS.Actions = PaParseCommonExpression(PaPositionNow, PaPositionEnd);
break;
case LexemeType.CODE_BLOCK:
CS.Actions = PaParseCodeBlock(PaPositionNow);
PaPositionNow += 1;
PaPositionEnd = PaPositionNow;
break;
case LexemeType.IF:
CS.Actions = PaParseIf();
break;
case LexemeType.FOR:
CS.Actions = PaParseFor();
break;
case LexemeType.WHILE:
CS.Actions = PaParseWhile();
break;
case LexemeType.DO:
CS.Actions = PaParseDoWhile();
break;
case LexemeType.TRY:
CS.Actions = PaParseTry();
break;
case LexemeType.STATEMENT_END_MARK:
CS.Actions = new IntermediateCode();;
break;
default:
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
CSList.Add(CS);
PaPositionEnd += 1;
}
TS.Catches = CSList;
// Parse final
// Check if there is a "final"
if (PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type == LexemeType.FINALLY)
{
PaPositionEnd += 1;
// Assert PaLexemeStream still have lexemes
if (PaPositionEnd == PaLexemeStream.Count)
{
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "Statements are expected.";
Error.LineNo = PaLexemeStream[PaPositionEnd - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
PaPositionNow = PaPositionEnd;
switch (PaLexemeStream[PaPositionNow].Type)
{
case LexemeType.ID:
int IDStart = PaPositionNow;
PaPositionNow += 1;
if (PaLexemeStream[PaPositionNow].Type == LexemeType.LV1_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV2_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV3_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV4_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV5_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV6_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV7_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV8_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV9_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LV10_OPERATOR ||
PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_BRACKET)
{
PaPositionEnd = PaPositionNow;
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
TS.FinalActions = PaParseCommonExpression(IDStart, PaPositionEnd);
break;
}
else
{
Error.ID = ErrorID.C0011;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
case LexemeType.CHAR_VALUE:
case LexemeType.FLOAT_VALUE:
case LexemeType.INT_VALUE:
case LexemeType.LV2_OPERATOR:
case LexemeType.NEW:
case LexemeType.STRING_VALUE:
case LexemeType.TRUE:
case LexemeType.FALSE:
case LexemeType.LEFT_BRACKET:
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
TS.FinalActions = PaParseCommonExpression(PaPositionNow, PaPositionEnd);
break;
case LexemeType.CODE_BLOCK:
TS.FinalActions = PaParseCodeBlock(PaPositionNow);
PaPositionNow += 1;
PaPositionEnd = PaPositionNow;
break;
case LexemeType.IF:
TS.FinalActions = PaParseIf();
break;
case LexemeType.FOR:
TS.FinalActions = PaParseFor();
break;
case LexemeType.WHILE:
TS.FinalActions = PaParseWhile();
break;
case LexemeType.DO:
TS.FinalActions = PaParseDoWhile();
break;
case LexemeType.TRY:
TS.FinalActions = PaParseTry();
break;
case LexemeType.STATEMENT_END_MARK:
TS.FinalActions = new IntermediateCode();;
break;
default:
Error.ID = ErrorID.C0013;
Error.ErrorDetail = "Cannot declear here.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
IC.StatementContent = TS;
return(IC);
}
private IntermediateCode PaParseDeclaration()
{
int Accessibility = 0; // 0: private; 1: protected; 2: public. Private in default.
// bool AccessbilityEdited = false;
int AccessbilityAssignmentLine = 0;
int Inherit = 0; // 0: N/A; 1: virtual; 2: override. Normal in default.
// bool InheritEdited = false;
int InheritAssignmentLine = 0;
int EditControl = 0; // 0: N/A; 1: static; 2: const; 3: final. Normal in default
// bool EditControlEdited = false;
int EditControlAssignmentLine = 0;
int Type; // 0: bool; 1: int; 2: float; 3: double; 4: char; 5: string; 6: id(an instanced class); 7:enmu; 8: class;
string TypeName = "";
int TypeAssignmentLine = 0; // For future use(abstract classes). Now it makes no sense.
bool IsArray = false; // To show if the declared variable or method is an array.
bool IfArrayLengthDefined = false;
int ArrayLength = 0;
string Name = "";
int Mode = 0; // 0: Variable; 1: Method; 2. Class; 3. Enum; 4. Array.
int LineNumber = PaLexemeStream[PaPositionEnd].LineNumber;
bool IsConstructor = false;
IntermediateCode IC = new IntermediateCode();
try
{
// During the 'for' in PaParse, the PaPositionEnd is automatically added one so that it points to the first lexeme of the next statement.
// Set PaPositionNow to the first lexeme of the current statement.
PaPositionNow = PaPositionEnd;
#region ParseModifier
// Not necessary. The method is called based on the first lexeme so that it can't be Line_Marker.
// PaJumpLineMarksNow();
// Access control
if (PaLexemeStream[PaPositionNow].Type == LexemeType.PRIVATE)
{
PaPositionNow += 1;
// AccessbilityEdited = true;
AccessbilityAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.PROTECTED)
{
Accessibility = 1;
PaPositionNow += 1;
// AccessbilityEdited = true;
AccessbilityAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.PUBLIC)
{
Accessibility = 2;
PaPositionNow += 1;
// AccessbilityEdited = true;
AccessbilityAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
// else: fall through
// InheriteControl
// N/A needs nothing to do.
if (PaLexemeStream[PaPositionNow].Type == LexemeType.VIRTUAL)
{
Inherit = 1;
PaPositionNow += 1;
// InheritEdited = true;
InheritAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.OVERRIDE)
{
Inherit = 2;
PaPositionNow += 1;
// InheritEdited = true;
EditControlAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
// else: fall through
// EditControl
// N/A needs nothing to do.
if (PaLexemeStream[PaPositionNow].Type == LexemeType.STATIC)
{
EditControl = 1;
PaPositionNow += 1;
// EditControlEdited = true;
EditControlAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.CONST)
{
EditControl = 2;
PaPositionNow += 1;
// EditControlEdited = true;
EditControlAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.FINAL)
{
EditControl = 3;
PaPositionNow += 1;
// EditControlEdited = true;
EditControlAssignmentLine = PaLexemeStream[PaPositionNow].LineNumber;
}
// else: fall through
#endregion ParseModifier
// PaPositionNow points to the lexeme after all modifiers which should be type.
#region ParseType
// Type
// If not, throw bug.
switch (PaLexemeStream[PaPositionNow].Type)
{
case LexemeType.BOOL:
Type = 0;
PaPositionNow += 1;
break;
case LexemeType.INT:
Type = 1;
PaPositionNow += 1;
break;
case LexemeType.FLOAT:
Type = 2;
PaPositionNow += 1;
break;
case LexemeType.DOUBLE:
Type = 3;
PaPositionNow += 1;
break;
case LexemeType.CHAR:
Type = 4;
PaPositionNow += 1;
break;
case LexemeType.STRING:
Type = 5;
PaPositionNow += 1;
break;
case LexemeType.ID:
Type = 6;
TypeName = (string)PaLexemeStream[PaPositionNow].Value;
PaPositionNow += 1;
break;
case LexemeType.ENUM:
Type = 7;
Mode = 3;
PaPositionNow += 1;
break;
case LexemeType.CLASS:
Type = 7;
Mode = 2; // CAN BE DETERMINED NOW.
PaPositionNow += 1;
break;
// Modifier position error:
case LexemeType.PUBLIC:
case LexemeType.PRIVATE:
case LexemeType.PROTECTED:
case LexemeType.VIRTUAL:
case LexemeType.OVERRIDE:
case LexemeType.STATIC:
case LexemeType.CONST:
case LexemeType.FINAL:
Error ErrorMod = new Error();
ErrorMod.ID = ErrorID.C0010;
ErrorMod.ErrorDetail = "Invalid \"" + PaLexemeStream[PaPositionNow].Value.ToString() + "\". Modifier must be declared in order.";
ErrorMod.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(ErrorMod);
PaStopParsing = true;
return(IC);
default:
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "A declaration must have a type.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
// else: Must throw error
TypeAssignmentLine = PaLexemeStream[PaPositionNow - 1].LineNumber;
#endregion ParseType
// PaPositionNow points to the lexeme after type which should be ID.
if (PaPositionNow < PaLexemeStream.Count && PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_BRACKET)
{
IsConstructor = true;
goto ParseMethod;
}
// ArrayParsing.
#region ArrayParsing
if (PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_SQUARE_BRACKET)
{
IsArray = true;
#region ArrayLengthParsing
PaPositionNow += 1;
if (PaLexemeStream[PaPositionNow].Type == LexemeType.RIGHT_SQUARE_BRACKET)
{
IfArrayLengthDefined = false;
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.INT_VALUE)
{
IfArrayLengthDefined = true;
ArrayLength = (int)PaLexemeStream[PaPositionNow].Value;
PaPositionNow += 1;
// Pair two square bracket. If not, return error.
if (PaLexemeStream[PaPositionNow].Type != LexemeType.RIGHT_SQUARE_BRACKET)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "Array's length must be only one constant integer.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "Array's length must be only one constant integer.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
#endregion ArrayLengthParsing
PaPositionNow += 1;
}
#endregion ArrayParsing
// Continue or error
// Parse Name
#region ParseName
if (PaPositionNow >= PaLexemeStream.Count || PaLexemeStream[PaPositionNow].Type != LexemeType.ID)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "A declaration must have a name comes after the type.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else
{
Name = (string)PaLexemeStream[PaPositionNow].Value;
PaPositionNow++;
}
#endregion ParseID
// PaPositionNow points to the lexeme after ID.
#region ClassParsing
if (Mode == 2)
{
ICClassDeclaration CD = new ICClassDeclaration();
CD.Accessbility = Accessibility;
CD.Name = Name;
CD.LineNumber = LineNumber;
// Process inheritive
if (PaPositionNow < PaLexemeStream.Count && PaLexemeStream[PaPositionNow].Type == LexemeType.COLON)
{
PaPositionNow += 1;
while (PaPositionNow < PaLexemeStream.Count && PaLexemeStream[PaPositionNow].Type == LexemeType.ID)
{
CD.Ancestors.Add(PaLexemeStream[PaPositionNow]);
PaPositionNow += 1;
// Assert the next lexeme is a comma. If not, break;
if (PaPositionNow < PaLexemeStream.Count && PaLexemeStream[PaPositionNow].Type != LexemeType.LV10_OPERATOR)
{
break;
}
else
{
PaPositionNow += 1;
}
}
}
if (PaPositionNow >= PaLexemeStream.Count || PaLexemeStream[PaPositionNow].Type != LexemeType.CODE_BLOCK /* || PaLexemeStream[PaPositionNow + 1].Type != LexemeType.STATEMENT_END_MARK Assert that
* it must have been ended. The statement end mark is automatically added to the stream by the Scanner */
)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of class is illegal. '{' is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else
{
if (EditControl != 0)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of class cannot setup an edit control level.";
Error.LineNo = EditControlAssignmentLine;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (Inherit != 0)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of class cannot setup an inheriting modifier.";
Error.LineNo = InheritAssignmentLine;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (IsArray)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of class is illegal.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
CD.Declarations = new List <IntermediateCode>();
Scanner ScanClassContents = new Scanner((string)PaLexemeStream[PaPositionNow].Value);
ScanClassContents.ScSetInitialLineCount(PaLexemeStream[PaPositionNow].LineNumber);
Parser ParseClassContents = new Parser(ScanClassContents.ScScan());
ParseClassContents.PaForceTreatIDAsDeclaration = true;
CD.Declarations = ParseClassContents.PaParse();
foreach (IntermediateCode CheckingIC in CD.Declarations)
{
if (CheckingIC.Type == ICStatementType.CONSTRUCTOR_DECLARATION)
{
CD.Constructors.Add((ICMethodDeclaration)CheckingIC.StatementContent);
}
else if (CheckingIC.Type == ICStatementType.DESTRUCTOR_DECLARATION)
{
if (CD.Destructor == null)
{
CD.Destructor = (ICMethodDeclaration)CheckingIC.StatementContent;
}
else
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "A class can only have one destructor.";
Error.LineNo = ((ICMethodDeclaration)CheckingIC.StatementContent).LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else if (CheckingIC.Type != ICStatementType.VARIABLE_DECLARATION && CheckingIC.Type != ICStatementType.METHOD_DECLARATION && CheckingIC.Type != ICStatementType.ENUM_DECLARATION)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "A class can only consist of variables and methods.";
Error.LineNo = CD.LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
IC.StatementContent = CD;
IC.Type = ICStatementType.CLASS_DECLARATION;
PaPositionEnd = PaPositionNow + 1;
return(IC);
}
}
#endregion ClassParsing
// Returned or error.
// EnumParsing.
#region EnumParsing
if (Mode == 3)
{
if (PaPositionNow >= PaLexemeStream.Count || PaLexemeStream[PaPositionNow].Type != LexemeType.CODE_BLOCK)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum is not legal. '{' is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else
{
ICEnumDeclaration ED = new ICEnumDeclaration();
ED.Accessbility = Accessibility;
ED.Name = Name;
ED.LineNumber = LineNumber;
if (EditControl != 0)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum cannot setup an edit control level.";
Error.LineNo = EditControlAssignmentLine;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (Inherit != 0)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum cannot setup an inheriting modifier.";
Error.LineNo = InheritAssignmentLine;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (IsArray)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum is illegal.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
ED.Items = new List <string>();
Scanner ScanEnumContents = new Scanner((string)PaLexemeStream[PaPositionNow].Value);
List <Lexeme> LabelTokens = new List <Lexeme>();
ScanEnumContents.ScSetInitialLineCount(PaLexemeStream[PaPositionNow].LineNumber);
LabelTokens = ScanEnumContents.ScScan();
for (int i = 0; i < LabelTokens.Count; i++)
{
if (i < LabelTokens.Count && LabelTokens[i].Type == LexemeType.ID)
{
ED.Items.Add((string)LabelTokens[i].Value);
i += 1;
// If i is larger than LabelTokens.Count, that means every label is scanned
// and no more ',' is required.
if (i < LabelTokens.Count && LabelTokens[i].Type != LexemeType.LV10_OPERATOR)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum is not legal. A ',' is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
else
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of enum is not legal. A label is expected.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
PaPositionEnd = PaPositionNow + 1;
IC.StatementContent = ED;
IC.Type = ICStatementType.ENUM_DECLARATION;
return(IC);
}
}
#endregion EnumParsing
// Returned or error.
ParseMethod:
// MethodParsing. Only defiened methods are valid now. Need Improvement
#region MethodParsing
if (PaLexemeStream[PaPositionNow].Type == LexemeType.LEFT_BRACKET)
{
ICMethodDeclaration MD = new ICMethodDeclaration();
MD.Accessbility = Accessibility;
MD.EditControl = EditControl;
MD.Inherit = Inherit;
MD.Type = Type;
MD.LineNumber = LineNumber;
if (Type == 6)
{
MD.TypeName = TypeName;
}
MD.Name = Name;
PaPositionNow += 1;
MD.ArgumentList = PaParseArgumentList();
MD.IsArray = IsArray;
if (IsArray && IfArrayLengthDefined)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The length cannot be declared here.";
Error.LineNo = EditControlAssignmentLine;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
if (PaPositionNow >= PaLexemeStream.Count || PaLexemeStream[PaPositionNow].Type != LexemeType.CODE_BLOCK)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration of method is illegal. Need and only need a code block.";
Error.LineNo = PaLexemeStream[PaPositionNow - 1].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
else
{
// PaPositionNow -> CodeBlock
MD.IfDefined = true;
MD.Definition = new List <IntermediateCode>();
Scanner ScanMethodContents = new Scanner((string)PaLexemeStream[PaPositionNow].Value);
ScanMethodContents.ScSetInitialLineCount(PaLexemeStream[PaPositionNow].LineNumber);
Parser ParseMethodContents = new Parser(ScanMethodContents.ScScan());
MD.Definition = ParseMethodContents.PaParse();
PaPositionEnd = PaPositionNow + 1; // PaPositionEnd = PaPositionNow + 1 -> STATEMENT_END_MARK
IC.StatementContent = MD;
if (IsConstructor)
{
IC.Type = ICStatementType.CONSTRUCTOR_DECLARATION;
}
else
{
IC.Type = ICStatementType.METHOD_DECLARATION;
}
return(IC);
}
}
#endregion MethodParsing
// Returned or error
ICVariableDeclaration VD = new ICVariableDeclaration();
IC.Type = ICStatementType.VARIABLE_DECLARATION;
VD.Accessbility = Accessibility;
VD.EditControl = EditControl;
VD.Inherit = Inherit;
VD.Type = Type;
VD.LineNumber = LineNumber;
if (VD.Type == 6)
{
VD.TypeName = TypeName;
}
VD.Name = Name;
VD.IsArray = IsArray;
VD.IfArrayLengthDefined = IfArrayLengthDefined;
VD.ArrayLength = ArrayLength;
if (PaLexemeStream[PaPositionNow].Type == LexemeType.STATEMENT_END_MARK)
{
IC.StatementContent = (object)VD;
return(IC);
}
else if (PaLexemeStream[PaPositionNow].Type == LexemeType.LV9_OPERATOR && (Operators)PaLexemeStream[PaPositionNow].Value == Operators.ASSIGN)
{
PaPositionNow += 1;
VD.IfDefined = true;
PaPositionEnd = PaPositionNow;
for (; PaPositionEnd < PaLexemeStream.Count && PaLexemeStream[PaPositionEnd].Type != LexemeType.STATEMENT_END_MARK; PaPositionEnd++)
{
;
}
VD.Definition = PaParseCommonExpression(PaPositionNow, PaPositionEnd);
IC.StatementContent = (object)VD;
return(IC);
}
else
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "Unexpected character \"" + PaLexemeStream[PaPositionNow].Value.ToString() + "\".";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
/////////////////////////////////////////////
//
// Assert: The code will never get here.
//
/////////////////////////////////////////////
}
catch (System.Exception)
{
Error Error = new Error();
Error.ID = ErrorID.C0010;
Error.ErrorDetail = "The declaration parsing now meets an unhandled problem. Please contact the developer of Cimplex for bug reporting.";
Error.LineNo = PaLexemeStream[PaPositionNow].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
return(IC);
}
}
} // PaParse : List<IntermediateCode>
/// <summary>
/// Parser worker method.
/// </summary>
/// <returns>Parsed intermediate code list.</returns>
private List <IntermediateCode> PaParseW()
{
List <IntermediateCode> ReturnList = new List <IntermediateCode>();
for (; PaPositionEnd < PaLexemeStream.Count && !PaStopParsing; PaPositionEnd++)
{
switch (PaLexemeStream[PaPositionEnd].Type)
{
#region Declaration
// Parse Declaration
case LexemeType.PUBLIC:
case LexemeType.PROTECTED:
case LexemeType.PRIVATE:
case LexemeType.VIRTUAL:
case LexemeType.OVERRIDE:
case LexemeType.STATIC:
case LexemeType.CONST:
case LexemeType.FINAL:
case LexemeType.BOOL:
case LexemeType.INT:
case LexemeType.FLOAT:
case LexemeType.DOUBLE:
case LexemeType.CHAR:
case LexemeType.STRING:
case LexemeType.VOID:
case LexemeType.CLASS:
case LexemeType.ENUM:
ReturnList.Add(PaParseDeclaration());
break;
case LexemeType.DESTRUCTOR_MARK:
ReturnList.Add(PaParseDestructor());
break;
#endregion Declaration
#region StartsWithID
// 1. Expression
// 2. Declaration
case LexemeType.ID:
int IDPosition = PaPositionEnd + 1;
if (IDPosition == PaLexemeStream.Count)
{
Error ErrorG = new Error();
ErrorG.ID = ErrorID.C0009;
ErrorG.ErrorDetail = "\";\" expected.";
ErrorG.LineNo = PaLexemeStream[PaPositionEnd].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(ErrorG);
PaStopParsing = true;
break;
}
if (PaLexemeStream[IDPosition].Type == LexemeType.LV1_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV2_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV3_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV4_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV5_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV6_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV7_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV8_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV9_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LV10_OPERATOR ||
PaLexemeStream[IDPosition].Type == LexemeType.LEFT_SQUARE_BRACKET)
{
ReturnList.Add(PaParseExpression());
}
else if (PaLexemeStream[IDPosition].Type == LexemeType.LEFT_BRACKET)
{
if (PaForceTreatIDAsDeclaration)
{
ReturnList.Add(PaParseDeclaration());
}
else
{
ReturnList.Add(PaParseExpression());
}
}
else if (PaLexemeStream[IDPosition].Type == LexemeType.COLON)
{
ReturnList.Add(PaParseGotoTarget());
}
else if (PaLexemeStream[IDPosition].Type == LexemeType.STATEMENT_END_MARK)
{
Error ErrorG = new Error();
ErrorG.ID = ErrorID.C0009;
ErrorG.ErrorDetail = "A statement is required.";
ErrorG.LineNo = PaLexemeStream[PaPositionEnd].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(ErrorG);
PaStopParsing = true;
break;
}
else
{
ReturnList.Add(PaParseDeclaration());
}
break;
#endregion StartWithID
case LexemeType.CHAR_VALUE:
case LexemeType.FLOAT_VALUE:
case LexemeType.INT_VALUE:
case LexemeType.LV2_OPERATOR:
case LexemeType.NEW:
case LexemeType.STRING_VALUE:
case LexemeType.TRUE:
case LexemeType.FALSE:
case LexemeType.LEFT_BRACKET:
ReturnList.Add(PaParseExpression());
break;
case LexemeType.RIGHT_BRACKET:
Error Error = new Error();
Error.ID = ErrorID.C0009;
Error.ErrorDetail = "Unexpected \")\".";
Error.LineNo = PaLexemeStream[PaPositionEnd].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(Error);
PaStopParsing = true;
break;
case LexemeType.CODE_BLOCK:
ReturnList.Add(PaParseCodeBlock(PaPositionEnd));
PaPositionEnd += 1;
break;
case LexemeType.IF:
ReturnList.Add(PaParseIf());
break;
case LexemeType.FOR:
ReturnList.Add(PaParseFor());
break;
case LexemeType.WHILE:
ReturnList.Add(PaParseWhile());
break;
case LexemeType.DO:
ReturnList.Add(PaParseDoWhile());
break;
case LexemeType.GOTO:
ReturnList.Add(PaParseGoto());
break;
case LexemeType.TRY:
ReturnList.Add(PaParseTry());
break;
case LexemeType.LABEL_NAME:
break;
case LexemeType.RETURN:
ReturnList.Add(PaParseReturn());
break;
case LexemeType.STATEMENT_END_MARK:
IntermediateCode Empty = new IntermediateCode();
Empty.Type = ICStatementType.EMPTY_STATEMENT;
ReturnList.Add(Empty);
break;
default:
Error ErrorT = new Error();
ErrorT.ID = ErrorID.C0009;
ErrorT.ErrorDetail = "Unexpected \"" + PaLexemeStream[PaPositionEnd].Type.ToString() + "\".";
ErrorT.LineNo = PaLexemeStream[PaPositionEnd].LineNumber;
ErrorHandler.ErrorHandler.EhErrorOutput(ErrorT);
PaStopParsing = true;
break;
}
}
return(ReturnList);
} // PaParseW : List<IntermediateCode>
