Improve accuracy of constraint system violation diagnostics.

2016-11-05 11:27:23 -06:00
parent b55744e1ad
commit 5f0a73ce11
4 changed files with 30 additions and 7 deletions
--- a/src/zcash/IncrementalMerkleTree.cpp
+++ b/src/zcash/IncrementalMerkleTree.cpp
@@ -70,6 +70,17 @@ void IncrementalMerkleTree<Depth, Hash>::wfcheck() const {
    }
 }

+template<size_t Depth, typename Hash>
+Hash IncrementalMerkleTree<Depth, Hash>::last() const {
+    if (right) {
+        return *right;
+    } else if (left) {
+        return *left;
+    } else {
+        throw std::runtime_error("tree has no cursor");
+    }
+}
+
 template<size_t Depth, typename Hash>
 void IncrementalMerkleTree<Depth, Hash>::append(Hash obj) {
    if (is_complete(Depth)) {