本文整理汇总了C#中TypeSymbol.?.GetDelegateType方法的典型用法代码示例。如果您正苦于以下问题：C# TypeSymbol.?.GetDelegateType方法的具体用法？C# TypeSymbol.?.GetDelegateType怎么用？C# TypeSymbol.?.GetDelegateType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类TypeSymbol的用法示例。
在下文中一共展示了TypeSymbol.?.GetDelegateType方法的1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: InferReturnType
private static TypeSymbol InferReturnType(
BoundBlock block,
Binder binder,
TypeSymbol delegateType,
bool isAsync,
ref HashSet<DiagnosticInfo> useSiteDiagnostics,
out RefKind refKind,
out bool inferredFromSingleType)
{
int numberOfDistinctReturns;
var resultTypes = BlockReturns.GetReturnTypes(block, out refKind, out numberOfDistinctReturns);
inferredFromSingleType = numberOfDistinctReturns < 2;
TypeSymbol bestResultType;
if (resultTypes.IsDefaultOrEmpty)
{
bestResultType = null;
}
else if (resultTypes.Length == 1)
{
bestResultType = resultTypes[0];
}
else
{
bestResultType = BestTypeInferrer.InferBestType(resultTypes, binder.Conversions, ref useSiteDiagnostics);
}
if (!isAsync)
{
return bestResultType;
}
// For async lambdas, the return type is the return type of the
// delegate Invoke method if Invoke has a Task-like return type.
// Otherwise the return type is Task or Task<T>.
NamedTypeSymbol taskType = null;
var delegateReturnType = delegateType?.GetDelegateType()?.DelegateInvokeMethod?.ReturnType as NamedTypeSymbol;
if ((object)delegateReturnType != null)
{
NamedTypeSymbol builderType;
MethodSymbol createBuilderMethod;
if (delegateReturnType.IsCustomTaskType(out builderType, out createBuilderMethod))
{
taskType = delegateReturnType;
}
}
if (resultTypes.IsEmpty)
{
// No return statements have expressions; use delegate InvokeMethod
// or infer type Task if delegate type not available.
return (object)taskType != null && taskType.Arity == 0 ?
taskType :
binder.Compilation.GetWellKnownType(WellKnownType.System_Threading_Tasks_Task);
}
if ((object)bestResultType == null || bestResultType.SpecialType == SpecialType.System_Void)
{
// If the best type was 'void', ERR_CantReturnVoid is reported while binding the "return void"
// statement(s).
return null;
}
// Some non-void best type T was found; use delegate InvokeMethod
// or infer type Task<T> if delegate type not available.
var taskTypeT = (object)taskType != null && taskType.Arity == 1 ?
delegateReturnType.ConstructedFrom :
binder.Compilation.GetWellKnownType(WellKnownType.System_Threading_Tasks_Task_T);
return taskTypeT.Construct(bestResultType);
}