Simple wrapper for const generics.

Usage

Currently 'the type of const parameters must not depend on other generic parameters' (E0770). compile_fail struct A<N, const C : N>(N); With this crate we can solve this by wrapping cosnt generic. use const_generic_wrap::*; struct A<N, C>(N, C) where C : ConstWrap<BaseType = N>; // WrapU32 is ZST, so the size of A is as same as u32. assert_eq!(mem::size_of::<WrapU32<12>>(), 0); assert_eq!(mem::size_of::<A::<u32, WrapU32<12>>>(), mem::size_of::<u32>()); // you can selectively use const or non const struct B<N, C>(N, C) where C : ConstOrValue<N>; // or it can be C : Into<N> fn add_b<N, C>(v : B<N, C>) -> N where N : Add<Output = N>, C : ConstOrValue<N>{ v.0 + v.1.into() } let b_non_const = B(31, 11); let b_const = B(31, WrapI32::<11>); assert_eq!(add_b(b_non_const), add_b(b_const));