Add std::hash overloads for Node, TNode and TypeNode. (#6534)

Eliminates NodeHashFunction, TNodeHashFunction and TypeNodeHashFunction.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/smt/sygus_solver.cpp b/src/smt/sygus_solver.cpp
index 317bb2646..37d752230 100644
--- a/src/smt/sygus_solver.cpp
+++ b/src/smt/sygus_solver.cpp
@@ -285,7 +285,7 @@ void SygusSolver::checkSynthSolution(Assertions& as)
   }
   Trace("check-synth-sol") << "Got solution map:\n";
   // the set of synthesis conjectures in our assertions
-  std::unordered_set<Node, NodeHashFunction> conjs;
+  std::unordered_set<Node> conjs;
   // For each of the above conjectures, the functions-to-synthesis and their
   // solutions. This is used as a substitution below.
   std::map<Node, std::vector<Node>> fvarMap;
@@ -317,7 +317,7 @@ void SygusSolver::checkSynthSolution(Assertions& as)
   // auxiliary assertions
   std::vector<Node> auxAssertions;
   // expand definitions cache
-  std::unordered_map<Node, Node, NodeHashFunction> cache;
+  std::unordered_map<Node, Node> cache;
   for (Node assertion : *alist)
   {
     Notice() << "SygusSolver::checkSynthSolution(): checking assertion "