quick update to expose affine X, Y

.gitignore

@@ -1,3 +1,6 @@
 target
 Cargo.lock
-pkg
+pkg
+*.key
+*.proof
+*.data

Cargo.toml

@@ -6,7 +6,7 @@ homepage = "https://github.com/matter-labs/bellman"
 license = "MIT/Apache-2.0"
 name = "bellman_ce"
 repository = "https://github.com/matter-labs/bellman"
-version = "0.3.2"
+version = "0.3.3"
 edition = "2018"
 
 [lib]
@@ -18,7 +18,7 @@ bit-vec = "0.6"
 cfg-if = "0.1"
 
 #pairing = {package = "pairing_ce", path = "../pairing" }
-pairing = {package = "pairing_ce", version = "0.19" }
+pairing = {package = "pairing_ce", version = "0.20" }
 byteorder = "1"
 
 futures= {package = "futures", version = "0.3", default_features = false, features = ["executor"]}

src/cs.rs

@@ -199,7 +199,7 @@ impl fmt::Display for SynthesisError {
             write!(f, "I/O error: ")?;
             e.fmt(f)
         } else {
-            write!(f, "{}", self.description())
+            write!(f, "{}", self.to_string())
         }
     }
 }

src/tests/dummy_engine.rs

@@ -485,4 +485,20 @@ impl CurveAffine for Fr {
     fn into_projective(&self) -> Self::Projective {
         *self
     }
+
+    fn as_xy(&self) -> (&Self::Base, &Self::Base) {
+        (self, self)
+    }
+
+    fn into_xy_unchecked(&self) -> (Self::Base, Self::Base) {
+        (*self, *self)
+    }
+
+    fn from_xy_unchecked(_x: Self::Base, _y: Self::Base) -> Self {
+        _x
+    }
+
+    fn from_xy_checked(_x: Self::Base, _y: Self::Base) -> Result<Self, GroupDecodingError> {
+        Ok(_x)
+    }
 }