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C# AggregateType.GetTypeArgsThis方法代码示例

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


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示例1: TryVarianceAdjustmentToGetAccessibleType

        private bool TryVarianceAdjustmentToGetAccessibleType(CSemanticChecker semanticChecker, BindingContext bindingContext, AggregateType typeSrc, out CType typeDst)
        {
            Debug.Assert(typeSrc != null);
            Debug.Assert(typeSrc.isInterfaceType() || typeSrc.isDelegateType());

            typeDst = null;

            AggregateSymbol aggSym = typeSrc.GetOwningAggregate();
            AggregateType aggOpenType = aggSym.getThisType();

            if (!semanticChecker.CheckTypeAccess(aggOpenType, bindingContext.ContextForMemberLookup()))
            {
                // if the aggregate symbol itself is not accessible, then forget it, there is no
                // variance that will help us arrive at an accessible type.
                return false;
            }

            TypeArray typeArgs = typeSrc.GetTypeArgsThis();
            TypeArray typeParams = aggOpenType.GetTypeArgsThis();
            CType[] newTypeArgsTemp = new CType[typeArgs.size];

            for (int i = 0; i < typeArgs.size; i++)
            {
                if (semanticChecker.CheckTypeAccess(typeArgs.Item(i), bindingContext.ContextForMemberLookup()))
                {
                    // we have an accessible argument, this position is not a problem.
                    newTypeArgsTemp[i] = typeArgs.Item(i);
                    continue;
                }

                if (!typeArgs.Item(i).IsRefType() || !typeParams.Item(i).AsTypeParameterType().Covariant)
                {
                    // This guy is inaccessible, and we are not going to be able to vary him, so we need to fail.
                    return false;
                }

                CType intermediateTypeArg;
                if (GetBestAccessibleType(semanticChecker, bindingContext, typeArgs.Item(i), out intermediateTypeArg))
                {
                    // now we either have a value type (which must be accessible due to the above
                    // check, OR we have an inaccessible type (which must be a ref type). In either
                    // case, the recursion worked out and we are OK to vary this argument.
                    newTypeArgsTemp[i] = intermediateTypeArg;
                    continue;
                }
                else
                {
                    Debug.Assert(false, "GetBestAccessibleType unexpectedly failed on a type that was used as a type parameter");
                    return false;
                }
            }

            TypeArray newTypeArgs = semanticChecker.getBSymmgr().AllocParams(typeArgs.size, newTypeArgsTemp);
            CType intermediateType = this.GetAggregate(aggSym, typeSrc.outerType, newTypeArgs);

            // All type arguments were varied successfully, which means now we must be accessible. But we could
            // have violated constraints. Let's check that out.

            if (!TypeBind.CheckConstraints(semanticChecker, null/*ErrorHandling*/, intermediateType, CheckConstraintsFlags.NoErrors))
            {
                return false;
            }

            typeDst = intermediateType;
            Debug.Assert(semanticChecker.CheckTypeAccess(typeDst, bindingContext.ContextForMemberLookup()));
            return true;
        }
开发者ID:ChuangYang,项目名称:corefx,代码行数:67,代码来源:TypeManager.cs


注:本文中的Microsoft.CSharp.RuntimeBinder.Semantics.AggregateType.GetTypeArgsThis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。