C# Ast.FunctionDefinition类代码示例

 public override void PostWalk(FunctionDefinition node)
 {
     if (node.Body != null && node.Name != null) {
         _scopes.Pop();
         _scopeTree.Pop();
         _curUnit = _analysisStack.Pop();
     }
 }

		public PythonMethod(IClass declaringType, FunctionDefinition methodDefinition, string name)
			: base(declaringType, name)
		{
			ReturnType = new DefaultReturnType(declaringType);
			Modifiers = ModifierEnum.Public;
			
			GetMethodRegions(methodDefinition);
			AddParameters(methodDefinition);
			
			declaringType.Methods.Add(this);
		}

		public override bool Walk(FunctionDefinition node)
		{
			if (IsInitializeComponentMethod(node)) {
				Type type = GetComponentType();
				component = componentCreator.CreateComponent(type, componentName);
				IResourceReader reader = componentCreator.GetResourceReader(CultureInfo.InvariantCulture);
				if (reader != null) {
					reader.Dispose();
				}
				node.Body.Walk(this);
			}
			return false;
		}

		public override bool Walk(FunctionDefinition functionDefinition)
		{
			if (functionDefinition.Body == null) {
				return false;
			}
			
			IClass c = GetClassBeingWalked();
			
			PythonMethodDefinition methodDefinition = new PythonMethodDefinition(functionDefinition);
			PythonMethod method = methodDefinition.CreateMethod(c);
			if (method is PythonConstructor) {
				FindFields(c, functionDefinition);
			}
			return false;
		}

 private static ImageListKind GetImageListKind(FunctionDefinition funcDef)
 {
     ImageListKind imageKind = ImageListKind.Method;
     if (funcDef.Decorators != null && funcDef.Decorators.Count == 1) {
         foreach (var decorator in funcDef.Decorators) {
             NameExpression nameExpr = decorator as NameExpression;
             if (nameExpr != null) {
                 if (nameExpr.Name == "property") {
                     imageKind = ImageListKind.Property;
                     break;
                 } else if (nameExpr.Name == "staticmethod") {
                     imageKind = ImageListKind.StaticMethod;
                     break;
                 } else if (nameExpr.Name == "classmethod") {
                     imageKind = ImageListKind.ClassMethod;
                     break;
                 }
             }
         }
     }
     return imageKind;
 }

        //  genexpr_for  ::= "for" target_list "in" or_test [genexpr_iter]
        //  genexpr_iter ::= (genexpr_for | genexpr_if) *
        //
        //  "for" has NOT been eaten before entering this method
        private Expression ParseGeneratorExpression(Expression expr) {
            ForStatement root = ParseGenExprFor();
            Statement current = root;

            for (; ; ) {
                if (PeekToken(Tokens.KeywordForToken)) {
                    current = NestGenExpr(current, ParseGenExprFor());
                } else if (PeekToken(Tokens.KeywordIfToken)) {
                    current = NestGenExpr(current, ParseGenExprIf());
                } else {
                    // Generator Expressions have an implicit function definition and yield around their expression.
                    //  (x for i in R)
                    // becomes:
                    //   def f(): 
                    //     for i in R: yield (x)
                    ExpressionStatement ys = new ExpressionStatement(new YieldExpression(expr));
                    ys.Expression.SetLoc(_globalParent, expr.IndexSpan);
                    ys.SetLoc(_globalParent, expr.IndexSpan);
                    NestGenExpr(current, ys);
                    break;
                }
            }

            // We pass the outermost iterable in as a parameter because Python semantics
            // say that this one piece is computed at definition time rather than iteration time
            const string fname = "<genexpr>";
            Parameter parameter = new Parameter("__gen_$_parm__", 0);
            FunctionDefinition func = new FunctionDefinition(fname, new Parameter[] { parameter }, root);
            func.IsGenerator = true;
            func.SetLoc(_globalParent, root.StartIndex, GetEnd());
            func.HeaderIndex = root.EndIndex;

            //  Transform the root "for" statement
            Expression outermost = root.List;
            NameExpression ne = new NameExpression("__gen_$_parm__");
            ne.SetLoc(_globalParent, outermost.IndexSpan);
            root.List = ne;

            GeneratorExpression ret = new GeneratorExpression(func, outermost);
            ret.SetLoc(_globalParent, expr.StartIndex, GetEnd());
            return ret;
        }

 private void PushFunction(FunctionDefinition function) {
     if (_functions == null) {
         _functions = new Stack<FunctionDefinition>();
     }
     _functions.Push(function);
 }

		public PythonMethodDefinition(FunctionDefinition methodDefinition)
		{
			this.methodDefinition = methodDefinition;
		}

        private Expression ParseLambdaHelperEnd(FunctionDefinition func, Expression expr) {
            // Pep 342 in Python 2.5 allows Yield Expressions, which can occur inside a Lambda body. 
            // In this case, the lambda is a generator and will yield it's final result instead of just return it.
            Statement body;
            if (func.IsGenerator) {
                YieldExpression y = new YieldExpression(expr);
                y.SetLoc(_globalParent, expr.IndexSpan);
                body = new ExpressionStatement(y);
            } else {
                body = new ReturnStatement(expr);
            }
            body.SetLoc(_globalParent, expr.StartIndex, expr.EndIndex);

            FunctionDefinition func2 = PopFunction();
            System.Diagnostics.Debug.Assert(func == func2);

            func.Body = body;
            func.EndIndex = GetEnd();

            LambdaExpression ret = new LambdaExpression(func);
            func.SetLoc(_globalParent, func.IndexSpan);
            ret.SetLoc(_globalParent, func.IndexSpan);
            return ret;
        }

 public override bool Walk(FunctionDefinition node)
 {
     // Do not recurse into nested functions
     return node == func;
 }

            public static string[] FindNames(FunctionDefinition function) {
                var parameters = function.Parameters;

                if (parameters.Count > 0) {
                    SelfNameFinder finder = new SelfNameFinder(function, parameters[0]);
                    function.Body.Walk(finder);
                    return ArrayUtils.ToArray(finder._names.Keys);
                } else {
                    // no point analyzing function with no parameters
                    return ArrayUtils.EmptyStrings;
                }
            }

		void GetMethodRegions(FunctionDefinition methodDefinition)
		{
			GetBodyRegion(methodDefinition);
			GetMethodRegion(methodDefinition);
		}

		/// <summary>
		/// Gets the region of a method. This does not include the body.
		/// </summary>
		void GetMethodRegion(FunctionDefinition methodDefinition)
		{
			SourceLocation start = methodDefinition.Start;
			SourceLocation end = methodDefinition.Header;
			Region = new DomRegion(start.Line, start.Column, end.Line, end.Column + 1);
		}

 // FunctionDefinition
 public override void PostWalk(FunctionDefinition node)
 {
     Debug.Assert(_currentScope == node);
     PopScope();
 }

        // FunctionDefinition
        public override bool Walk(FunctionDefinition node)
        {
            node._nameVariable = _globalScope.EnsureGlobalVariable("__name__");

            // Name is defined in the enclosing context
            if (!node.IsLambda) {
                node.PythonVariable = DefineName(node.Name);
            }

            // process the default arg values in the outer context
            foreach (Parameter p in node.Parameters) {
                if (p.DefaultValue != null) {
                    p.DefaultValue.Walk(this);
                }
            }
            // process the decorators in the outer context
            if (node.Decorators != null) {
                foreach (Expression dec in node.Decorators) {
                    dec.Walk(this);
                }
            }

            PushScope(node);

            foreach (Parameter p in node.Parameters) {
                p.Walk(_parameter);
            }

            node.Body.Walk(this);
            return false;
        }