Use noexcept more. (#7058)

src/nlsat/nlsat_assignment.h

@@ -33,7 +33,7 @@ namespace nlsat {
     public:
         assignment(anum_manager & _m):m_values(_m) {}
         anum_manager & am() const { return m_values.m(); }
-        void swap(assignment & other) {
+        void swap(assignment & other) noexcept {
             m_values.swap(other.m_values);
             m_assigned.swap(other.m_assigned);
         }
@@ -67,7 +67,7 @@ namespace nlsat {
         anum_manager & m() const override { return am(); }
         bool contains(var x) const override { return is_assigned(x); }
         anum const & operator()(var x) const override { SASSERT(is_assigned(x)); return value(x); }
-        void swap(var x, var y) {
+        void swap(var x, var y) noexcept {
             SASSERT(x < m_values.size() && y < m_values.size());
             std::swap(m_assigned[x], m_assigned[y]);
             std::swap(m_values[x], m_values[y]);

src/nlsat/nlsat_scoped_literal_vector.h

@@ -67,7 +67,7 @@ namespace nlsat {
         void append(scoped_literal_vector const& ls) {
             append(ls.size(), ls.data());
         }
-        void swap(scoped_literal_vector& other) {
+        void swap(scoped_literal_vector& other) noexcept {
             SASSERT(&m_solver == &other.m_solver);
             m_lits.swap(other.m_lits);
         }

src/nlsat/nlsat_solver.cpp

@@ -48,7 +48,7 @@ namespace nlsat {
     typedef chashtable<root_atom*, root_atom::hash_proc, root_atom::eq_proc> root_atom_table;
 
     // for apply_permutation procedure
-    void swap(clause * & c1, clause * & c2) {
+    void swap(clause * & c1, clause * & c2) noexcept {
         std::swap(c1, c2);
     }