https://issues.dlang.org/show_bug.cgi?id=23666
--- Comment #1 from Bolpat <qs.il.paperi...@gmail.com> --- Generalization: To be “aptly constrained” means that the constraint is a type of the following form: ```d Int delegate ParameterList MemberFunctionAttributes` ``` where `ParameterList` and `MemberFunctionAttributes` [3, 4] are defined in the D grammar, and Int is `int` with any type constructors (`const`, `inout`, `shared`) applied to it (they don’t matter anyways), but it shouldn’t fail because some type inference made it e.g. `const`. --
