Add prover_data method

plonky2/src/plonk/circuit_builder.rs

@@ -836,15 +836,8 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
         [(); C::Hasher::HASH_SIZE]:,
     {
         // TODO: Can skip parts of this.
-        let CircuitData {
-            prover_only,
-            common,
-            ..
-        } = self.build();
-        ProverCircuitData {
-            prover_only,
-            common,
-        }
+        let circuit_data = self.build();
+        circuit_data.prover_data()
     }
 
     /// Builds a "verifier circuit", with data needed to verify proofs but not generate them.
@@ -853,14 +846,7 @@ impl<F: RichField + Extendable<D>, const D: usize> CircuitBuilder<F, D> {
         [(); C::Hasher::HASH_SIZE]:,
     {
         // TODO: Can skip parts of this.
-        let CircuitData {
-            verifier_only,
-            common,
-            ..
-        } = self.build();
-        VerifierCircuitData {
-            verifier_only,
-            common,
-        }
+        let circuit_data = self.build();
+        circuit_data.verifier_data()
     }
 }

plonky2/src/plonk/circuit_data.rs

@@ -151,6 +151,18 @@ impl<F: RichField + Extendable<D>, C: GenericConfig<D, F = F>, const D: usize>
             common,
         }
     }
+
+    pub fn prover_data(self) -> ProverCircuitData<F, C, D> {
+        let CircuitData {
+            prover_only,
+            common,
+            ..
+        } = self;
+        ProverCircuitData {
+            prover_only,
+            common,
+        }
+    }
 }
 
 /// Circuit data required by the prover. This may be thought of as a proving key, although it