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Implement procedural macro generated trait.
Currently, ff-uint create struct for prime field with following proc_macro_derive:
#[derive(PrimeField)]
#[PrimeFieldModulus = "6554484396890773809930967563523245729705921265872317281365359162392183254199"]
#[PrimeFieldGenerator = "7"]
pub struct Fs(U256);
(see https://github.com/zeropoolnetwork/ff-uint/blob/master/tests/ff-uint_tests.rs#L28 )
It should be rewritten in one code style with current uint implementation (https://github.com/zeropoolnetwork/ff-uint/blob/master/src/uint/mod.rs#L5).
To use macro_rules
generated types, we need a procedural macro for constants computation for the following constants:
- MODULUS
- MODULUS_BITS
- R
- R2
- INV
- GENERATOR
- S
- ROOT_OF_UNITY
Constants should be computed from 2 input params: PrimeFieldModulus and PrimeFieldGenerator.
Resulting trait should be something like this:
impl PrimeFieldParams for Fs {
type Inner = U256;
const MODULUS: Self::Inner = ....,
const MODULUS_BITS:u32 = ...
....
}
It could be obtained for following construction or something else like this:
construct_primefield_params! {
impl PrimeFieldParams for Fs {
type Inner = U256;
const MODULUS: &'static str = "6554484396890773809930967563523245729705921265872317281365359162392183254199";
const GENERATOR: &'static str = "7"
}
}
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