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1. Simplify the parameter/return requirements.
2. Clarify the intent around invalid imported metadata.
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Fredric Silberberg 2020-08-25 17:10:34 -07:00
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proposals/csharp-9.0/function-pointers.md
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@ -359,10 +359,9 @@ the attribute:
* It is an error to directly call a method annotated with this attribute from C#. Users must obtain a function pointer to * It is an error to directly call a method annotated with this attribute from C#. Users must obtain a function pointer to
the method and then invoke that pointer. the method and then invoke that pointer.
* It is an error to apply the attribute to anything other than an ordinary static method or ordinary static local function. * It is an error to apply the attribute to anything other than an ordinary static method or ordinary static local function.
The C# compiler will mark any non-static methods imported from metadata with this attribute as unsupported by the language. The C# compiler will mark any non-static or static non-ordinary methods imported from metadata with this attribute as
* It is an error to have managed types as parameters or the return type of a method marked with the attribute. If the parameter unsupported by the language.
or return types are unmanaged except for generic type parameters, they are only allowed if those parameters are substituted * It is an error for a method marked with the attribute to have a parameter or return type that is not an `unmanaged_type`.
with unmanaged types themselves.
* It is an error for a method marked with the attribute to have type parameters, even if those type parameters are * It is an error for a method marked with the attribute to have type parameters, even if those type parameters are
constrained to `unmanaged`. constrained to `unmanaged`.
* It is an error for a method in a generic type to be marked with the attribute. * It is an error for a method in a generic type to be marked with the attribute.