[lib] implement is_modtype & co using kernel primitives
[lib] implement is_modtype & co using kernel primitives

Zimmi48/coq,SkySkimmer/coq,coq/coq,Zimmi48/coq,ejgallego/coq,SkySkimmer/coq,coq/coq,ejgallego/coq,SkySkimmer/coq,SkySkimmer/coq,ejgallego/coq,coq/coq,Zimmi48/coq,coq/coq,Zimmi48/coq,ejgallego/coq