예제 #1
0
파일: CiParser.cs 프로젝트: epi/cito
 CiType LookupType(string name)
 {
     CiSymbol symbol = this.Symbols.TryLookup(name);
     if (symbol is CiType)
     return (CiType) symbol;
     if (symbol is CiClass)
     return new CiClassPtrType { Name = name, Class = (CiClass) symbol};
     if (symbol == null) {
     CiType unknown = new CiUnknownType();
     unknown.Name = name;
     return unknown;
     }
     throw new ParseException("{0} is not a type", name);
 }
예제 #2
0
        CiType ICiTypeVisitor.Visit(CiUnknownType type)
        {
            CiSymbol symbol = this.Symbols.Lookup(type.Name);

            if (symbol is CiType)
            {
                return((CiType)symbol);
            }
            if (symbol is CiClass)
            {
                return new CiClassPtrType {
                           Name = type.Name, Class = (CiClass)symbol
                }
            }
            ;
            throw new ResolveException("{0} is not a type", type.Name);
        }

        CiType ICiTypeVisitor.Visit(CiStringStorageType type)
        {
            type.Length = (int)ResolveConstExpr(type.LengthExpr, CiIntType.Value);
            return(type);
        }

        CiClass ResolveClass(CiClass klass)
        {
            if (klass is CiUnknownClass)
            {
                string name = klass.Name;

                klass = this.Symbols.Lookup(name) as CiClass;
                if (klass == null)
                {
                    throw new ResolveException("{0} is not a class", name);
                }
            }
            return(klass);
        }

        CiType ICiTypeVisitor.Visit(CiClassType type)
        {
            type.Class = ResolveClass(type.Class);
            return(type);
        }

        CiType ICiTypeVisitor.Visit(CiArrayType type)
        {
            type.ElementType = Resolve(type.ElementType);
            return(type);
        }

        CiType ICiTypeVisitor.Visit(CiArrayStorageType type)
        {
            type.ElementType = Resolve(type.ElementType);
            if (type.LengthExpr != null)
            {
                type.Length     = (int)ResolveConstExpr(type.LengthExpr, CiIntType.Value);
                type.LengthExpr = null;
            }
            return(type);
        }

        CiType Resolve(CiType type)
        {
            return(type.Accept(this));
        }

        CiCondExpr Coerce(CiCondExpr expr, CiType expected)
        {
            return(new CiCondExpr {
                Cond = expr.Cond,
                ResultType = expected,
                OnTrue = Coerce(expr.OnTrue, expected),
                OnFalse = Coerce(expr.OnFalse, expected)
            });
        }
예제 #3
0
        CiType LookupType(string name)
        {
            CiSymbol symbol = this.Symbols.TryLookup(name);

            if (symbol is CiType)
            {
                return((CiType)symbol);
            }
            if (symbol is CiClass)
            {
                return new CiClassPtrType {
                           Name = name, Class = (CiClass)symbol
                }
            }
            ;
            if (symbol == null)
            {
                CiType unknown = new CiUnknownType();

                unknown.Name = name;
                return(unknown);
            }
            throw new ParseException("{0} is not a type", name);
        }

        CiType ParseArrayType(CiType baseType)
        {
            if (Eat(CiToken.LeftBracket))
            {
                if (Eat(CiToken.RightBracket))
                {
                    return new CiArrayPtrType {
                               ElementType = ParseArrayType(baseType)
                    }
                }
                ;
                CiExpr len = ParseExpr();
                Expect(CiToken.RightBracket);
                return(new CiArrayStorageType {
                    LengthExpr = len,
                    ElementType = ParseArrayType(baseType)
                });
            }
            return(baseType);
        }

        CiType ParseType()
        {
            string baseName = ParseId();
            CiType baseType;

            if (Eat(CiToken.LeftParenthesis))
            {
                if (baseName == "string")
                {
                    baseType = new CiStringStorageType {
                        LengthExpr = ParseExpr()
                    };

                    Expect(CiToken.RightParenthesis);
                }
                else
                {
                    Expect(CiToken.RightParenthesis);
                    baseType = new CiClassStorageType {
                        Name = baseName, Class = new CiUnknownClass {
                            Name = baseName
                        }
                    };
                }
            }
            else
            {
                baseType = LookupType(baseName);
            }
            return(ParseArrayType(baseType));
        }

        object ParseConstInitializer(CiType type)
        {
            if (type is CiArrayType)
            {
                Expect(CiToken.LeftBrace);
                CiType        elementType = ((CiArrayType)type).ElementType;
                List <object> list        = new List <object>();
                if (!See(CiToken.RightBrace))
                {
                    do
                    {
                        list.Add(ParseConstInitializer(elementType));
                    }while (Eat(CiToken.Comma));
                }
                Expect(CiToken.RightBrace);
                return(list.ToArray());
            }
            return(ParseExpr());
        }

        CiConst ParseConst()
        {
            Expect(CiToken.Const);
            CiConst konst = new CiConst();

            konst.Type = ParseType();
            konst.Name = ParseId();
            Expect(CiToken.Assign);
            konst.Value = ParseConstInitializer(konst.Type);
            Expect(CiToken.Semicolon);
            if (this.Symbols.Parent != null && konst.Type is CiArrayType)
            {
                this.ConstArrays.Add(konst);
                konst.GlobalName = "CiConstArray_" + this.ConstArrays.Count;
            }
            return(konst);
        }

        CiBinaryResourceExpr ParseBinaryResource()
        {
            Expect(CiToken.LeftParenthesis);
            CiExpr nameExpr = ParseExpr();

            Expect(CiToken.RightParenthesis);
            return(new CiBinaryResourceExpr {
                NameExpr = nameExpr
            });
        }

        CiExpr ParsePrimaryExpr()
        {
            if (See(CiToken.Increment) || See(CiToken.Decrement) || See(CiToken.Minus) || See(CiToken.Not))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                CiExpr inner = ParsePrimaryExpr();
                return(new CiUnaryExpr {
                    Op = op, Inner = inner
                });
            }
            if (Eat(CiToken.CondNot))
            {
                CiExpr inner = ParsePrimaryExpr();
                return(new CiCondNotExpr {
                    Inner = inner
                });
            }
            CiExpr result;

            if (See(CiToken.IntConstant))
            {
                result = new CiConstExpr(this.CurrentInt);
                NextToken();
            }
            else if (See(CiToken.StringConstant))
            {
                result = new CiConstExpr(this.CurrentString);
                NextToken();
            }
            else if (Eat(CiToken.LeftParenthesis))
            {
                result = ParseExpr();
                Expect(CiToken.RightParenthesis);
            }
            else if (See(CiToken.Id))
            {
                string name = ParseId();
                if (name == "BinaryResource")
                {
                    result = ParseBinaryResource();
                }
                else
                {
                    CiSymbol symbol = this.Symbols.TryLookup(name);
                    if (symbol is CiMacro)
                    {
                        Expand((CiMacro)symbol);
                        Expect(CiToken.LeftParenthesis);
                        result = ParseExpr();
                        Expect(CiToken.RightParenthesis);
                    }
                    else
                    {
                        if (symbol == null)
                        {
                            symbol = new CiUnknownSymbol {
                                Name = name
                            }
                        }
                        ;
                        result = new CiSymbolAccess {
                            Symbol = symbol
                        };
                    }
                }
            }
            else if (Eat(CiToken.New))
            {
                CiType newType = ParseType();
                if (!(newType is CiClassStorageType || newType is CiArrayStorageType))
                {
                    throw new ParseException("'new' syntax error");
                }
                result = new CiNewExpr {
                    NewType = newType
                };
            }
            else
            {
                throw new ParseException("Invalid expression");
            }
            for (;;)
            {
                if (Eat(CiToken.Dot))
                {
                    result = new CiUnknownMemberAccess {
                        Parent = result, Name = ParseId()
                    }
                }
                ;
                else if (Eat(CiToken.LeftParenthesis))
                {
                    CiMethodCall call = new CiMethodCall();
                    call.Obj = result;
                    List <CiExpr> args = new List <CiExpr>();
                    if (!See(CiToken.RightParenthesis))
                    {
                        do
                        {
                            args.Add(ParseExpr());
                        }while (Eat(CiToken.Comma));
                    }
                    Expect(CiToken.RightParenthesis);
                    call.Arguments = args.ToArray();
                    result         = call;
                }
                else if (Eat(CiToken.LeftBracket))
                {
                    CiExpr index = ParseExpr();
                    Expect(CiToken.RightBracket);
                    result = new CiIndexAccess {
                        Parent = result, Index = index
                    };
                }
                else if (See(CiToken.Increment) || See(CiToken.Decrement))
                {
                    CiToken op = this.CurrentToken;
                    NextToken();
                    return(new CiPostfixExpr {
                        Inner = result, Op = op
                    });
                }
                else
                {
                    return(result);
                }
            }
        }

        CiExpr ParseMulExpr()
        {
            CiExpr left = ParsePrimaryExpr();

            while (See(CiToken.Asterisk) || See(CiToken.Slash) || See(CiToken.Mod))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                left = new CiBinaryExpr {
                    Left = left, Op = op, Right = ParsePrimaryExpr()
                };
            }
            return(left);
        }

        CiExpr ParseAddExpr()
        {
            CiExpr left = ParseMulExpr();

            while (See(CiToken.Plus) || See(CiToken.Minus))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                left = new CiBinaryExpr {
                    Left = left, Op = op, Right = ParseMulExpr()
                };
            }
            return(left);
        }

        CiExpr ParseShiftExpr()
        {
            CiExpr left = ParseAddExpr();

            while (See(CiToken.ShiftLeft) || See(CiToken.ShiftRight))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                left = new CiBinaryExpr {
                    Left = left, Op = op, Right = ParseAddExpr()
                };
            }
            return(left);
        }

        CiExpr ParseRelExpr()
        {
            CiExpr left = ParseShiftExpr();

            while (See(CiToken.Less) || See(CiToken.LessOrEqual) || See(CiToken.Greater) || See(CiToken.GreaterOrEqual))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                left = new CiBoolBinaryExpr {
                    Left = left, Op = op, Right = ParseShiftExpr()
                };
            }
            return(left);
        }

        CiExpr ParseEqualityExpr()
        {
            CiExpr left = ParseRelExpr();

            while (See(CiToken.Equal) || See(CiToken.NotEqual))
            {
                CiToken op = this.CurrentToken;
                NextToken();
                left = new CiBoolBinaryExpr {
                    Left = left, Op = op, Right = ParseRelExpr()
                };
            }
            return(left);
        }

        CiExpr ParseAndExpr()
        {
            CiExpr left = ParseEqualityExpr();

            while (Eat(CiToken.And))
            {
                left = new CiBinaryExpr {
                    Left = left, Op = CiToken.And, Right = ParseEqualityExpr()
                }
            }
            ;
            return(left);
        }

        CiExpr ParseXorExpr()
        {
            CiExpr left = ParseAndExpr();

            while (Eat(CiToken.Xor))
            {
                left = new CiBinaryExpr {
                    Left = left, Op = CiToken.Xor, Right = ParseAndExpr()
                }
            }
            ;
            return(left);
        }

        CiExpr ParseOrExpr()
        {
            CiExpr left = ParseXorExpr();

            while (Eat(CiToken.Or))
            {
                left = new CiBinaryExpr {
                    Left = left, Op = CiToken.Or, Right = ParseXorExpr()
                }
            }
            ;
            return(left);
        }

        CiExpr ParseCondAndExpr()
        {
            CiExpr left = ParseOrExpr();

            while (Eat(CiToken.CondAnd))
            {
                left = new CiBoolBinaryExpr {
                    Left = left, Op = CiToken.CondAnd, Right = ParseOrExpr()
                }
            }
            ;
            return(left);
        }

        CiExpr ParseCondOrExpr()
        {
            CiExpr left = ParseCondAndExpr();

            while (Eat(CiToken.CondOr))
            {
                left = new CiBoolBinaryExpr {
                    Left = left, Op = CiToken.CondOr, Right = ParseCondAndExpr()
                }
            }
            ;
            return(left);
        }

        CiExpr ParseExpr()
        {
            CiExpr left = ParseCondOrExpr();

            if (Eat(CiToken.QuestionMark))
            {
                CiCondExpr result = new CiCondExpr();
                result.Cond   = left;
                result.OnTrue = ParseExpr();
                Expect(CiToken.Colon);
                result.OnFalse = ParseExpr();
                return(result);
            }
            return(left);
        }

        CiMaybeAssign ParseMaybeAssign()
        {
            CiExpr  left = ParseExpr();
            CiToken op   = this.CurrentToken;

            if (op == CiToken.Assign || op == CiToken.AddAssign || op == CiToken.SubAssign || op == CiToken.MulAssign || op == CiToken.DivAssign || op == CiToken.ModAssign ||
                op == CiToken.AndAssign || op == CiToken.OrAssign || op == CiToken.XorAssign || op == CiToken.ShiftLeftAssign || op == CiToken.ShiftRightAssign)
            {
                NextToken();
                CiAssign result = new CiAssign();
                result.Target = left;
                result.Op     = op;
                result.Source = ParseMaybeAssign();
                return(result);
            }
            return(left);
        }

        ICiStatement ParseExprWithSideEffect()
        {
            ICiStatement result = ParseMaybeAssign() as ICiStatement;

            if (result == null)
            {
                throw new ParseException("Useless expression");
            }
            return(result);
        }

        CiExpr ParseCond()
        {
            Expect(CiToken.LeftParenthesis);
            CiExpr cond = ParseExpr();

            Expect(CiToken.RightParenthesis);
            return(cond);
        }

        void OpenScope()
        {
            this.Symbols = new SymbolTable {
                Parent = this.Symbols
            };
        }

        void CloseScope()
        {
            this.Symbols = this.Symbols.Parent;
        }

        CiVar ParseVar()
        {
            CiVar def = new CiVar();

            def.Type = ParseType();
            def.Name = ParseId();
            if (Eat(CiToken.Assign))
            {
                def.InitialValue = ParseExpr();
            }
            Expect(CiToken.Semicolon);
            this.Symbols.Add(def);
            return(def);
        }

        ICiStatement ParseVarOrExpr()
        {
            string   name   = this.CurrentString;
            CiSymbol symbol = this.Symbols.TryLookup(name);

            if (symbol is CiMacro)
            {
                NextToken();
                Expand((CiMacro)symbol);
                return(ParseStatement());
            }
            // try var
            StringBuilder sb = new StringBuilder();

            this.CopyTo = sb;
            try {
                return(ParseVar());
            }
            catch (ParseException) {
            }
            finally {
                this.CopyTo = null;
            }

            // try expr
            this.CurrentString = name;
            this.CurrentToken  = CiToken.Id;
            BeginExpand("ambigous code", sb.ToString(), null);
            SetReader(new StringReader(sb.ToString()));
            ICiStatement result = ParseExprWithSideEffect();

            Expect(CiToken.Semicolon);
            return(result);
        }

        CiNativeBlock ParseNativeBlock()
        {
            StringBuilder sb = new StringBuilder();

            this.CopyTo = sb;
            NextToken();
            bool oneLine = true;

            try {
                if (See(CiToken.LeftBrace))
                {
                    oneLine     = false;
                    sb          = new StringBuilder();
                    this.CopyTo = sb;
                    Expect(CiToken.LeftBrace);
                }
                int level = 1;
                for (;;)
                {
                    if (oneLine && See(CiToken.Semicolon) && level == 1)
                    {
                        break;
                    }
                    if (See(CiToken.EndOfFile))
                    {
                        throw new ParseException("Native block not terminated");
                    }
                    if (See(CiToken.LeftBrace))
                    {
                        level++;
                    }
                    else if (See(CiToken.RightBrace))
                    {
                        if (--level == 0)
                        {
                            break;
                        }
                    }
                    NextToken();
                }
            }
            finally {
                this.CopyTo = null;
            }
            NextToken();
            Trace.Assert(sb[sb.Length - 1] == '}');
            if (!oneLine)
            {
                sb.Length--;
            }
            else
            {
                sb.Append("\n\t");
            }

            return(new CiNativeBlock {
                Content = sb.ToString()
            });
        }

        CiSwitch ParseSwitch()
        {
            Expect(CiToken.LeftParenthesis);
            CiSwitch result = new CiSwitch();

            result.Value = ParseExpr();
            Expect(CiToken.RightParenthesis);
            Expect(CiToken.LeftBrace);

            List <CiCase> cases = new List <CiCase>();

            while (Eat(CiToken.Case))
            {
                List <object> values = new List <object>();
                do
                {
                    values.Add(ParseExpr());
                    Expect(CiToken.Colon);
                } while (Eat(CiToken.Case));
                if (See(CiToken.Default))
                {
                    throw new ParseException("Please remove case before default");
                }
                CiCase kase = new CiCase {
                    Values = values.ToArray()
                };

                List <ICiStatement> statements = new List <ICiStatement>();
                do
                {
                    statements.Add(ParseStatement());
                }while (!See(CiToken.Case) && !See(CiToken.Default) && !See(CiToken.Goto) && !See(CiToken.RightBrace));
                kase.Body = statements.ToArray();

                if (Eat(CiToken.Goto))
                {
                    if (Eat(CiToken.Case))
                    {
                        kase.FallthroughTo = ParseExpr();
                    }
                    else if (Eat(CiToken.Default))
                    {
                        kase.FallthroughTo = null;
                    }
                    else
                    {
                        throw new ParseException("Expected goto case or goto default");
                    }
                    Expect(CiToken.Semicolon);
                    kase.Fallthrough = true;
                }
                cases.Add(kase);
            }
            if (cases.Count == 0)
            {
                throw new ParseException("Switch with no cases");
            }
            result.Cases = cases.ToArray();

            if (Eat(CiToken.Default))
            {
                Expect(CiToken.Colon);
                List <ICiStatement> statements = new List <ICiStatement>();
                do
                {
                    statements.Add(ParseStatement());
                }while (!See(CiToken.RightBrace));
                result.DefaultBody = statements.ToArray();
            }

            Expect(CiToken.RightBrace);
            return(result);
        }

        ICiStatement ParseStatement()
        {
            while (Eat(CiToken.Macro))
            {
                this.Symbols.Add(ParseMacro());
            }
            if (See(CiToken.Id))
            {
                return(ParseVarOrExpr());
            }
            if (See(CiToken.LeftBrace))
            {
                OpenScope();
                CiBlock result = ParseBlock();
                CloseScope();
                return(result);
            }
            if (Eat(CiToken.Break))
            {
                Expect(CiToken.Semicolon);
                return(new CiBreak());
            }
            if (See(CiToken.Const))
            {
                CiConst konst = ParseConst();
                this.Symbols.Add(konst);
                return(konst);
            }
            if (Eat(CiToken.Continue))
            {
                Expect(CiToken.Semicolon);
                return(new CiContinue());
            }
            if (Eat(CiToken.Delete))
            {
                CiExpr expr = ParseExpr();
                Expect(CiToken.Semicolon);
                return(new CiDelete {
                    Expr = expr
                });
            }
            if (Eat(CiToken.Do))
            {
                CiDoWhile result = new CiDoWhile();
                result.Body = ParseStatement();
                Expect(CiToken.While);
                result.Cond = ParseCond();
                Expect(CiToken.Semicolon);
                return(result);
            }
            if (Eat(CiToken.For))
            {
                Expect(CiToken.LeftParenthesis);
                OpenScope();
                CiFor result = new CiFor();
                if (See(CiToken.Id))
                {
                    result.Init = ParseVarOrExpr();
                }
                else
                {
                    Expect(CiToken.Semicolon);
                }
                if (!See(CiToken.Semicolon))
                {
                    result.Cond = ParseExpr();
                }
                Expect(CiToken.Semicolon);
                if (!See(CiToken.RightParenthesis))
                {
                    result.Advance = ParseExprWithSideEffect();
                }
                Expect(CiToken.RightParenthesis);
                result.Body = ParseStatement();
                CloseScope();
                return(result);
            }
            if (Eat(CiToken.If))
            {
                CiIf result = new CiIf();
                result.Cond   = ParseCond();
                result.OnTrue = ParseStatement();
                if (Eat(CiToken.Else))
                {
                    result.OnFalse = ParseStatement();
                }
                return(result);
            }
            if (See(CiToken.Native))
            {
                return(ParseNativeBlock());
            }
            if (Eat(CiToken.Return))
            {
                CiReturn result = new CiReturn();
                if (this.CurrentMethod.Signature.ReturnType != CiType.Void)
                {
                    result.Value = ParseExpr();
                }
                Expect(CiToken.Semicolon);
                return(result);
            }
            if (Eat(CiToken.Switch))
            {
                return(ParseSwitch());
            }
            if (Eat(CiToken.Throw))
            {
                CiThrow result = new CiThrow();
                result.Message = ParseExpr();
                Expect(CiToken.Semicolon);
                return(result);
            }
            if (Eat(CiToken.While))
            {
                CiWhile result = new CiWhile();
                result.Cond = ParseCond();
                result.Body = ParseStatement();
                return(result);
            }
            throw new ParseException("Invalid statement");
        }

        CiBlock ParseBlock()
        {
            Expect(CiToken.LeftBrace);
            List <ICiStatement> statements = new List <ICiStatement>();

            while (!Eat(CiToken.RightBrace))
            {
                statements.Add(ParseStatement());
            }
            return(new CiBlock {
                Statements = statements.ToArray()
            });
        }

        CiParam CreateThis()
        {
            CiParam thiz = new CiParam();

            thiz.Type = new CiClassPtrType {
                Name = this.CurrentClass.Name, Class = this.CurrentClass
            };
            thiz.Name = "this";
            this.Symbols.Add(thiz);
            return(thiz);
        }

        CiType ParseReturnType()
        {
            if (Eat(CiToken.Void))
            {
                return(CiType.Void);
            }
            return(ParseType());
        }

        CiParam[] ParseParams()
        {
            Expect(CiToken.LeftParenthesis);
            List <CiParam> paramz = new List <CiParam>();

            if (!See(CiToken.RightParenthesis))
            {
                do
                {
                    CiParam param = new CiParam();
                    param.Documentation = ParseDoc();
                    param.Type          = ParseType();
                    param.Name          = ParseId();
                    this.Symbols.Add(param);
                    paramz.Add(param);
                } while (Eat(CiToken.Comma));
            }
            Expect(CiToken.RightParenthesis);
            return(paramz.ToArray());
        }

        void ParseMethod(CiMethod method)
        {
            this.CurrentMethod = method;
            OpenScope();
            if (method.CallType != CiCallType.Static)
            {
                method.This = CreateThis();
            }
            method.Signature.Params = ParseParams();
            if (method.CallType == CiCallType.Abstract)
            {
                Expect(CiToken.Semicolon);
            }
            else
            {
                method.Body = ParseBlock();
            }
            CloseScope();
            this.CurrentMethod = null;
        }

        CiMethod ParseConstructor()
        {
            NextToken();
            Expect(CiToken.LeftParenthesis);
            Expect(CiToken.RightParenthesis);
            OpenScope();
            CiMethod method = new CiMethod(
                CiType.Void, "<constructor>")
            {
                Class    = this.CurrentClass,
                CallType = CiCallType.Normal,
                This     = CreateThis()
            };

            this.CurrentMethod = method;
            method.Body        = ParseBlock();
            CloseScope();
            this.CurrentMethod = null;
            return(method);
        }

        CiClass ParseClass()
        {
            CiClass klass = new CiClass();

            klass.SourceFilename = this.Filename;
            if (Eat(CiToken.Abstract))
            {
                klass.IsAbstract = true;
            }
            Expect(CiToken.Class);
            klass.Name = ParseId();
            if (Eat(CiToken.Colon))
            {
                klass.BaseClass = new CiUnknownClass {
                    Name = ParseId()
                }
            }
            ;
            Expect(CiToken.LeftBrace);
            OpenScope();
            this.CurrentClass = klass;
            klass.Members     = this.Symbols;
            while (!Eat(CiToken.RightBrace))
            {
                CiCodeDoc    doc        = ParseDoc();
                CiVisibility visibility = CiVisibility.Private;
                if (Eat(CiToken.Public))
                {
                    visibility = CiVisibility.Public;
                }
                else if (Eat(CiToken.Internal))
                {
                    visibility = CiVisibility.Internal;
                }
                CiSymbol symbol;
                if (See(CiToken.Const))
                {
                    symbol = ParseConst();
                    ((CiConst)symbol).Class = klass;
                }
                else if (Eat(CiToken.Macro))
                {
                    if (visibility != CiVisibility.Private)
                    {
                        throw new ParseException("Macros must be private");
                    }
                    symbol = ParseMacro();
                }
                else
                {
                    if (See(CiToken.Id) && this.CurrentString == klass.Name)
                    {
                        if (klass.Constructor != null)
                        {
                            throw new ParseException("Duplicate constructor");
                        }
                        klass.Constructor = ParseConstructor();
                        continue;
                    }
                    CiCallType callType;
                    if (Eat(CiToken.Static))
                    {
                        callType = CiCallType.Static;
                    }
                    else if (Eat(CiToken.Abstract))
                    {
                        if (!klass.IsAbstract)
                        {
                            throw new ParseException("Abstract methods only allowed in abstract classes");
                        }
                        callType = CiCallType.Abstract;
                        if (visibility == CiVisibility.Private)
                        {
                            visibility = CiVisibility.Internal;
                        }
                    }
                    else if (Eat(CiToken.Virtual))
                    {
                        callType = CiCallType.Virtual;
                        if (visibility == CiVisibility.Private)
                        {
                            visibility = CiVisibility.Internal;
                        }
                    }
                    else if (Eat(CiToken.Override))
                    {
                        callType = CiCallType.Override;
                        if (visibility == CiVisibility.Private)
                        {
                            visibility = CiVisibility.Internal;
                        }
                    }
                    else
                    {
                        callType = CiCallType.Normal;
                    }
                    CiType type = ParseReturnType();
                    string name = ParseId();
                    if (See(CiToken.LeftParenthesis))
                    {
                        CiMethod method = new CiMethod(type, name)
                        {
                            Class    = klass,
                            CallType = callType
                        };
                        ParseMethod(method);
                        symbol = method;
                    }
                    else
                    {
                        if (visibility != CiVisibility.Private)
                        {
                            throw new ParseException("Fields must be private");
                        }
                        if (callType != CiCallType.Normal)
                        {
                            throw new ParseException("Fields cannot be static, abstract, virtual or override");
                        }
                        if (type == CiType.Void)
                        {
                            throw new ParseException("Field is void");
                        }
                        Expect(CiToken.Semicolon);
                        symbol = new CiField {
                            Class = klass, Type = type, Name = name
                        };
                    }
                }
                symbol.Documentation = doc;
                symbol.Visibility    = visibility;
                klass.Members.Add(symbol);
            }
            this.CurrentClass = null;
            CloseScope();
            klass.ConstArrays = this.ConstArrays.ToArray();
            this.ConstArrays.Clear();
            return(klass);
        }

        CiDelegate ParseDelegate()
        {
            CiDelegate del = new CiDelegate();

            Expect(CiToken.Delegate);
            del.ReturnType = ParseReturnType();
            del.Name       = ParseId();
            OpenScope();
            del.Params = ParseParams();
            CloseScope();
            Expect(CiToken.Semicolon);
            return(del);
        }

        public void Parse(string filename, TextReader reader)
        {
            Open(filename, reader);
            while (!See(CiToken.EndOfFile))
            {
                CiCodeDoc doc = ParseDoc();
                bool      pub = Eat(CiToken.Public);
                CiSymbol  symbol;
                if (See(CiToken.Enum))
                {
                    symbol = ParseEnum();
                }
                else if (See(CiToken.Class) || See(CiToken.Abstract))
                {
                    symbol = ParseClass();
                }
                else if (See(CiToken.Delegate))
                {
                    symbol = ParseDelegate();
                }
                else
                {
                    throw new ParseException("Expected class, enum or delegate");
                }
                symbol.Documentation = doc;
                symbol.Visibility    = pub ? CiVisibility.Public : CiVisibility.Internal;
                this.Symbols.Add(symbol);
            }
        }

        public CiProgram Program
        {
            get
            {
                return(new CiProgram {
                    Globals = this.Symbols
                });
            }
        }
    }
}
예제 #4
0
파일: CiResolver.cs 프로젝트: epi/cito
 CiType ICiTypeVisitor.Visit(CiUnknownType type)
 {
     CiSymbol symbol = this.Symbols.Lookup(type.Name);
     if (symbol is CiType)
     return (CiType) symbol;
     if (symbol is CiClass)
     return new CiClassPtrType { Name = type.Name, Class = (CiClass) symbol};
     throw new ResolveException("{0} is not a type", type.Name);
 }