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C# SemanticModel.GetConversion方法代码示例

本文整理汇总了C#中Microsoft.CodeAnalysis.SemanticModel.GetConversion方法的典型用法代码示例。如果您正苦于以下问题:C# SemanticModel.GetConversion方法的具体用法?C# SemanticModel.GetConversion怎么用?C# SemanticModel.GetConversion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.SemanticModel的用法示例。


在下文中一共展示了SemanticModel.GetConversion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: GetRegularExpressionType

            private static ITypeSymbol GetRegularExpressionType(SemanticModel semanticModel, SyntaxNode node)
            {
                // regular case. always use ConvertedType to get implicit conversion right.
                var expression = node.GetUnparenthesizedExpression();

                var info = semanticModel.GetTypeInfo(expression);
                var conv = semanticModel.GetConversion(expression);

                if (info.ConvertedType == null || info.ConvertedType.IsErrorType())
                {
                    // there is no implicit conversion involved. no need to go further
                    return info.Type;
                }

                // always use converted type if method group
                if ((!node.IsKind(SyntaxKind.ObjectCreationExpression) && semanticModel.GetMemberGroup(expression).Length > 0) ||
                    IsCoClassImplicitConversion(info, conv, semanticModel.Compilation.CoClassType()))
                {
                    return info.ConvertedType;
                }

                // check implicit conversion
                if (conv.IsImplicit && (conv.IsConstantExpression || conv.IsEnumeration))
                {
                    return info.ConvertedType;
                }

                // always try to use type that is more specific than object type if possible.
                return !info.Type.IsObjectType() ? info.Type : info.ConvertedType;
            }
开发者ID:pabloescribanoloza,项目名称:monodevelop,代码行数:30,代码来源:CSharpSelectionResult.ExpressionResult.cs

示例2: AssignmentSupportsStylePreference

        /// <summary>
        /// Analyzes the assignment expression and rejects a given declaration if it is unsuitable for implicit typing.
        /// </summary>
        /// <returns>
        /// false, if implicit typing cannot be used.
        /// true, otherwise.
        /// </returns>
        protected override bool AssignmentSupportsStylePreference(SyntaxToken identifier, TypeSyntax typeName, EqualsValueClauseSyntax initializer, SemanticModel semanticModel, OptionSet optionSet, CancellationToken cancellationToken)
        {
            var expression = GetInitializerExpression(initializer);

            // var cannot be assigned null
            if (expression.IsKind(SyntaxKind.NullLiteralExpression))
            {
                return false;
            }

            // cannot use implicit typing on method group, anonymous function or on dynamic
            var declaredType = semanticModel.GetTypeInfo(typeName, cancellationToken).Type;
            if (declaredType != null &&
               (declaredType.TypeKind == TypeKind.Delegate || declaredType.TypeKind == TypeKind.Dynamic))
            {
                return false;
            }

            // variables declared using var cannot be used further in the same initialization expression.
            if (initializer.DescendantNodesAndSelf()
                    .Where(n => (n as IdentifierNameSyntax)?.Identifier.ValueText.Equals(identifier.ValueText) == true)
                    .Any(n => semanticModel.GetSymbolInfo(n, cancellationToken).Symbol?.IsKind(SymbolKind.Local) == true))
            {
                return false;
            }

            // Get the conversion that occurred between the expression's type and type implied by the expression's context
            // and filter out implicit conversions. If an implicit conversion (other than identity) exists
            // and if we're replacing the declaration with 'var' we'd be changing the semantics by inferring type of
            // initializer expression and thereby losing the conversion.
            var conversion = semanticModel.GetConversion(expression, cancellationToken);
            if (conversion.Exists && conversion.IsImplicit && !conversion.IsIdentity)
            {
                return false;
            }

            // final check to compare type information on both sides of assignment.
            var initializerType = semanticModel.GetTypeInfo(expression, cancellationToken).Type;
            return declaredType.Equals(initializerType);
        }
开发者ID:Rickinio,项目名称:roslyn,代码行数:47,代码来源:CSharpUseImplicitTypeDiagnosticAnalyzer.cs


注:本文中的Microsoft.CodeAnalysis.SemanticModel.GetConversion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。