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use crate::{errors::SynthesisError, ConstraintSystem, LinearCombination, Variable};
use snarkvm_fields::Field;
use std::marker::PhantomData;
pub struct Namespace<'a, F: Field, CS: ConstraintSystem<F>>(pub(super) &'a mut CS, pub(super) PhantomData<F>);
impl<F: Field, CS: ConstraintSystem<F>> ConstraintSystem<F> for Namespace<'_, F, CS> {
type Root = CS::Root;
#[inline]
fn one() -> Variable {
CS::one()
}
#[inline]
fn alloc<FN, A, AR>(&mut self, annotation: A, f: FN) -> Result<Variable, SynthesisError>
where
FN: FnOnce() -> Result<F, SynthesisError>,
A: FnOnce() -> AR,
AR: AsRef<str>,
{
self.0.alloc(annotation, f)
}
#[inline]
fn alloc_input<FN, A, AR>(&mut self, annotation: A, f: FN) -> Result<Variable, SynthesisError>
where
FN: FnOnce() -> Result<F, SynthesisError>,
A: FnOnce() -> AR,
AR: AsRef<str>,
{
self.0.alloc_input(annotation, f)
}
#[inline]
fn enforce<A, AR, LA, LB, LC>(&mut self, annotation: A, a: LA, b: LB, c: LC)
where
A: FnOnce() -> AR,
AR: AsRef<str>,
LA: FnOnce(LinearCombination<F>) -> LinearCombination<F>,
LB: FnOnce(LinearCombination<F>) -> LinearCombination<F>,
LC: FnOnce(LinearCombination<F>) -> LinearCombination<F>,
{
self.0.enforce(annotation, a, b, c)
}
#[inline]
fn push_namespace<NR, N>(&mut self, _: N)
where
NR: AsRef<str>,
N: FnOnce() -> NR,
{
panic!("only the root's push_namespace should be called");
}
#[inline]
fn pop_namespace(&mut self) {
panic!("only the root's pop_namespace should be called");
}
#[inline]
fn get_root(&mut self) -> &mut Self::Root {
self.0.get_root()
}
#[inline]
fn num_constraints(&self) -> usize {
self.0.num_constraints()
}
#[inline]
fn num_public_variables(&self) -> usize {
self.0.num_public_variables()
}
#[inline]
fn num_private_variables(&self) -> usize {
self.0.num_private_variables()
}
}
impl<F: Field, CS: ConstraintSystem<F>> Drop for Namespace<'_, F, CS> {
#[inline]
fn drop(&mut self) {
self.get_root().pop_namespace()
}
}