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C# SyntheticBoundNodeFactory.Literal方法代码示例

本文整理汇总了C#中Microsoft.CodeAnalysis.CSharp.SyntheticBoundNodeFactory.Literal方法的典型用法代码示例。如果您正苦于以下问题:C# SyntheticBoundNodeFactory.Literal方法的具体用法?C# SyntheticBoundNodeFactory.Literal怎么用?C# SyntheticBoundNodeFactory.Literal使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Microsoft.CodeAnalysis.CSharp.SyntheticBoundNodeFactory的用法示例。


在下文中一共展示了SyntheticBoundNodeFactory.Literal方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: InitializeFixedStatementArrayLocal

        private BoundStatement InitializeFixedStatementArrayLocal(
            LocalSymbol localSymbol,
            BoundFixedLocalCollectionInitializer fixedInitializer,
            SyntheticBoundNodeFactory factory,
            out LocalSymbol arrayTemp)
        {
            // From ExpressionBinder::BindPtrToArray:
            // (((temp = array) != null && temp.Length > 0) ? loc = &temp[0] : loc = null)
            // NOTE: The assignment needs to be inside the EK_QUESTIONMARK. See Whidbey bug #397859.
            // We can't do loc = (... ? ... : ...) since the CLR type of &temp[0] is a managed
            // pointer and null is a UIntPtr - which confuses the JIT. We can't just convert
            // &temp[0] to UIntPtr with a conv.u instruction because then if a GC occurs between
            // the time of the cast and the assignment to the local, we're toast.

            TypeSymbol localType = localSymbol.Type;
            BoundExpression initializerExpr = VisitExpression(fixedInitializer.Expression);
            TypeSymbol initializerType = initializerExpr.Type;

            arrayTemp = factory.SynthesizedLocal(initializerType);
            ArrayTypeSymbol arrayType = (ArrayTypeSymbol)arrayTemp.Type;
            TypeSymbol arrayElementType = arrayType.ElementType;
            int arrayRank = arrayType.Rank;

            // NOTE: we pin the pointer, not the array.
            Debug.Assert(!arrayTemp.IsPinned);
            Debug.Assert(localSymbol.IsPinned);

            //(temp = array)
            BoundExpression arrayTempInit = factory.AssignmentExpression(factory.Local(arrayTemp), initializerExpr);

            //(temp = array) != null
            BoundExpression notNullCheck = MakeNullCheck(factory.Syntax, arrayTempInit, BinaryOperatorKind.NotEqual);

            BoundExpression lengthCall;

            if (arrayRank == 1)
            {
                lengthCall = factory.ArrayLength(factory.Local(arrayTemp));
            }
            else
            {
                MethodSymbol lengthMethod;
                if (TryGetWellKnownTypeMember(fixedInitializer.Syntax, WellKnownMember.System_Array__get_Length, out lengthMethod))
                {
                    lengthCall = factory.Call(factory.Local(arrayTemp), lengthMethod);
                }
                else
                {
                    lengthCall = new BoundBadExpression(fixedInitializer.Syntax, LookupResultKind.NotInvocable, ImmutableArray<Symbol>.Empty, ImmutableArray.Create<BoundNode>(factory.Local(arrayTemp)), ErrorTypeSymbol.UnknownResultType);
                }
            }

            // NOTE: dev10 comment says ">", but code actually checks "!="
            //temp.Length != 0
            BoundExpression lengthCheck = factory.Binary(BinaryOperatorKind.IntNotEqual, factory.SpecialType(SpecialType.System_Boolean), lengthCall, factory.Literal(0));

            //((temp = array) != null && temp.Length != 0)
            BoundExpression condition = factory.Binary(BinaryOperatorKind.LogicalBoolAnd, factory.SpecialType(SpecialType.System_Boolean), notNullCheck, lengthCheck);

            //temp[0]
            BoundExpression firstElement = factory.ArrayAccessFirstElement(factory.Local(arrayTemp));

            // NOTE: this is a fixed statement address-of in that it's the initial value of pinned local.
            //&temp[0]
            BoundExpression firstElementAddress = new BoundAddressOfOperator(factory.Syntax, firstElement, isFixedStatementAddressOf: true, type: new PointerTypeSymbol(arrayElementType));
            BoundExpression convertedFirstElementAddress = factory.Convert(
                localType,
                firstElementAddress, 
                fixedInitializer.ElementPointerTypeConversion);

            //loc = &temp[0]
            BoundExpression consequenceAssignment = factory.AssignmentExpression(factory.Local(localSymbol), convertedFirstElementAddress);

            //loc = null
            BoundExpression alternativeAssignment = factory.AssignmentExpression(factory.Local(localSymbol), factory.Null(localType));

            //(((temp = array) != null && temp.Length != 0) ? loc = &temp[0] : loc = null)
            BoundStatement localInit = factory.ExpressionStatement(
                new BoundConditionalOperator(factory.Syntax, condition, consequenceAssignment, alternativeAssignment, ConstantValue.NotAvailable, localType));

            return AddLocalDeclarationSequencePointIfNecessary(fixedInitializer.Syntax.Parent.Parent, localSymbol, localInit);
        }
开发者ID:modulexcite,项目名称:pattern-matching-csharp,代码行数:82,代码来源:LocalRewriter_FixedStatement.cs

示例2: AddAnalysisPoint

        private BoundStatement AddAnalysisPoint(SyntaxNode syntaxForSpan, FileLinePositionSpan span, SyntheticBoundNodeFactory statementFactory)
        {
            // Add an entry in the spans array.
            int spansIndex = _spansBuilder.Count;
            _spansBuilder.Add(new SourceSpan(GetSourceDocument(syntaxForSpan, span), span.StartLinePosition.Line, span.StartLinePosition.Character, span.EndLinePosition.Line, span.EndLinePosition.Character));

            // Generate "_payload[pointIndex] = true".
            BoundArrayAccess payloadCell = statementFactory.ArrayAccess(statementFactory.Local(_methodPayload), statementFactory.Literal(spansIndex));
            return statementFactory.Assignment(payloadCell, statementFactory.Literal(true));
        }
开发者ID:jkotas,项目名称:roslyn,代码行数:10,代码来源:DynamicAnalysisInjector.cs


注:本文中的Microsoft.CodeAnalysis.CSharp.SyntheticBoundNodeFactory.Literal方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。