rust - Generating unique ID's for types at compile time -

//pseudo code struct classtypeid{     id: &'static uint } impl classtypeid{     fn get_type<t>(&mut self) -> &'static uint {         let _id :&'static uint = self.id + 1;         self.id = _id;         _id     } }  let c = classtypeid{id:0}; c.get_type::<i32>();  // returns 1 c.get_type::<f32>();  // returns 2 c.get_type::<i32>();  // returns 1 c.get_type::<uint>(); // returns 3 

so want generate unique id every type @ compile time. possible in rust?

i stole idea c++ library, looks this

typedef std::size_t typeid;          template <typename tbase>         class classtypeid         {         public:              template <typename t>             static typeid gettypeid()             {                 static const typeid id = m_nexttypeid++;                 return id;             }          private:              static typeid m_nexttypeid;         };          template <typename tbase>         typeid classtypeid<tbase>::m_nexttypeid = 0;     } 

std::any::typeid that:

use std::any::typeid;  fn main() {     let type_id = typeid::of::<isize>();     println!("{:?}", type_id); } 

outputs:

typeid { t: 4150853580804116396 }