如何从 INamedTypeSymbol 获取类型约束列表

Question

I have a type that comes as INamedTypeSymbol , his definition like this:

    public interface IFoo<TFoo> where TFoo: class
    {
        TFoo Foo{ get; set; }
    }

How can I get the constraint list? (here is: where TFoo: class )

Answer 1

INamedTypeSymbol has a TypeParameters which will get you to TFoo , that type parameter symbol has various properties ( ConstraintTypes , HasReferenceTypeConstraint , etc.) to see what constraints exist.