Always produce instance and witness files for all fields (#97)

rust/src/producers/builder.rs

@@ -148,39 +148,45 @@ impl<S: Sink> MessageBuilder<S> {
     }
 
     fn flush_public_inputs(&mut self, type_id: TypeId) {
-        let public_input = self.public_inputs.get(&type_id).unwrap();
-        self.sink.push_public_inputs_message(public_input).unwrap();
-        self.public_inputs.remove(&type_id);
+        let type_value_opt = self.types.get(usize::try_from(type_id).unwrap());
+        if let Some(type_value) = type_value_opt {
+            let public_input =
+                self.public_inputs
+                    .remove(&type_id)
+                    .unwrap_or_else(|| PublicInputs {
+                        version: IR_VERSION.to_string(),
+                        type_value: type_value.clone(),
+                        inputs: vec![],
+                    });
+            self.sink.push_public_inputs_message(&public_input).unwrap();
+        }
     }
 
     fn flush_all_public_inputs(&mut self) {
-        let type_ids = self
-            .public_inputs
-            .iter()
-            .map(|(type_id, _)| *type_id)
-            .collect::<Vec<_>>();
-        for type_id in type_ids.iter() {
-            self.flush_public_inputs(*type_id);
-        }
+        let max_type_id = u8::try_from(self.types.len() - 1).unwrap();
+        (0..=max_type_id).for_each(|type_id| self.flush_public_inputs(type_id));
     }
 
     fn flush_private_inputs(&mut self, type_id: TypeId) {
-        let private_input = self.private_inputs.get(&type_id).unwrap();
-        self.sink
-            .push_private_inputs_message(private_input)
-            .unwrap();
-        self.private_inputs.remove(&type_id);
+        let type_value_opt = self.types.get(usize::try_from(type_id).unwrap());
+        if let Some(type_value) = type_value_opt {
+            let private_input =
+                self.private_inputs
+                    .remove(&type_id)
+                    .unwrap_or_else(|| PrivateInputs {
+                        version: IR_VERSION.to_string(),
+                        type_value: type_value.clone(),
+                        inputs: vec![],
+                    });
+            self.sink
+                .push_private_inputs_message(&private_input)
+                .unwrap();
+        }
     }
 
     fn flush_all_private_inputs(&mut self) {
-        let type_ids = self
-            .private_inputs
-            .iter()
-            .map(|(type_id, _)| *type_id)
-            .collect::<Vec<_>>();
-        for type_id in type_ids.iter() {
-            self.flush_private_inputs(*type_id);
-        }
+        let max_type_id = u8::try_from(self.types.len() - 1).unwrap();
+        (0..=max_type_id).for_each(|type_id| self.flush_private_inputs(type_id));
     }
 
     fn flush_relation(&mut self) {
@@ -1302,3 +1308,48 @@ fn test_builder_with_flush() {
     let evaluator = Evaluator::from_messages(source.iter_messages(), &mut zkbackend);
     assert_eq!(evaluator.get_violations(), Vec::<String>::new());
 }
+
+#[test]
+fn test_builder_with_files_sink() {
+    use crate::producers::builder::{BuildGate::*, GateBuilder, GateBuilderT};
+    use crate::producers::sink::FilesSink;
+    use std::fs::read_dir;
+    use std::path::PathBuf;
+
+    let workspace = PathBuf::from("local/test_builder_with_files_sink");
+    let sink = FilesSink::new_clean(&workspace).unwrap();
+
+    let mut b = GateBuilder::new(
+        sink,
+        &[],
+        &[Type::Field(vec![7]), Type::Field(vec![101])],
+        &[],
+    );
+
+    b.create_gate(New(0, 0, 1)).unwrap();
+    b.create_gate(New(1, 0, 1)).unwrap();
+
+    b.create_gate(Public(0, Some(vec![3]))).unwrap();
+    b.create_gate(Public(0, Some(vec![5]))).unwrap();
+    b.create_gate(Private(1, Some(vec![10]))).unwrap();
+    b.create_gate(Private(1, Some(vec![20]))).unwrap();
+
+    b.finish();
+
+    let mut filenames = read_dir(&workspace)
+        .unwrap()
+        .map(|res| res.unwrap().path().clone())
+        .collect::<Vec<_>>();
+
+    filenames.sort();
+
+    let expected_filenames = &[
+        ("local/test_builder_with_files_sink/000_public_inputs_0.sieve".into()),
+        ("local/test_builder_with_files_sink/000_public_inputs_1.sieve".into()),
+        ("local/test_builder_with_files_sink/001_private_inputs_0.sieve".into()),
+        ("local/test_builder_with_files_sink/001_private_inputs_1.sieve".into()),
+        ("local/test_builder_with_files_sink/002_relation.sieve".into()),
+    ] as &[PathBuf];
+
+    assert_eq!(filenames.as_slice(), expected_filenames);
+}