本文整理汇总了C#中INamedTypeSymbol.IsNullable方法的典型用法代码示例。如果您正苦于以下问题：C# INamedTypeSymbol.IsNullable方法的具体用法？C# INamedTypeSymbol.IsNullable怎么用？C# INamedTypeSymbol.IsNullable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INamedTypeSymbol的用法示例。
在下文中一共展示了INamedTypeSymbol.IsNullable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: CanSimplifyNullable
private static bool CanSimplifyNullable(INamedTypeSymbol type, NameSyntax name, SemanticModel semanticModel)
{
if (!type.IsNullable())
{
return false;
}
if (type.IsUnboundGenericType)
{
// Don't simplify unbound generic type "Nullable<>".
return false;
}
if (InsideNameOfExpression(name, semanticModel))
{
// Nullable<T> can't be simplified to T? in nameof expressions.
return false;
}
if (!InsideCrefReference(name))
{
// Nullable<T> can always be simplified to T? outside crefs.
return true;
}
// Inside crefs, if the T in this Nullable{T} is being declared right here
// then this Nullable{T} is not a constructed generic type and we should
// not offer to simplify this to T?.
//
// For example, we should not offer the simplification in the following cases where
// T does not bind to an existing type / type parameter in the user's code.
// - <see cref="Nullable{T}"/>
// - <see cref="System.Nullable{T}.Value"/>
//
// And we should offer the simplification in the following cases where SomeType and
// SomeMethod bind to a type and method declared elsewhere in the users code.
// - <see cref="SomeType.SomeMethod(Nullable{SomeType})"/>
var argument = type.TypeArguments.SingleOrDefault();
if (argument == null || argument.IsErrorType())
{
return false;
}
var argumentDecl = argument.DeclaringSyntaxReferences.FirstOrDefault();
if (argumentDecl == null)
{
// The type argument is a type from metadata - so this is a constructed generic nullable type that can be simplified (e.g. Nullable(Of Integer)).
return true;
}
return !name.Span.Contains(argumentDecl.Span);
}