diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index bb47b6092..efa6074a4 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -671,7 +671,7 @@ struct hb_pair_t
     return 0;
   }
 
-  friend void swap (hb_pair_t& a, hb_pair_t& b)
+  friend void swap (hb_pair_t& a, hb_pair_t& b) noexcept
   {
     hb_swap (a.first, b.first);
     hb_swap (a.second, b.second);
diff --git a/src/hb-bit-set-invertible.hh b/src/hb-bit-set-invertible.hh
index 262625180..d5d1326d9 100644
--- a/src/hb-bit-set-invertible.hh
+++ b/src/hb-bit-set-invertible.hh
@@ -39,10 +39,10 @@ struct hb_bit_set_invertible_t
 
   hb_bit_set_invertible_t () = default;
   hb_bit_set_invertible_t (const hb_bit_set_invertible_t& o) = default;
-  hb_bit_set_invertible_t (hb_bit_set_invertible_t&& other) : hb_bit_set_invertible_t () { hb_swap (*this, other); }
+  hb_bit_set_invertible_t (hb_bit_set_invertible_t&& other)  noexcept : hb_bit_set_invertible_t () { hb_swap (*this, other); }
   hb_bit_set_invertible_t& operator= (const hb_bit_set_invertible_t& o) = default;
-  hb_bit_set_invertible_t& operator= (hb_bit_set_invertible_t&& other) { hb_swap (*this, other); return *this; }
-  friend void swap (hb_bit_set_invertible_t &a, hb_bit_set_invertible_t &b)
+  hb_bit_set_invertible_t& operator= (hb_bit_set_invertible_t&& other)  noexcept { hb_swap (*this, other); return *this; }
+  friend void swap (hb_bit_set_invertible_t &a, hb_bit_set_invertible_t &b) noexcept
   {
     if (likely (!a.s.successful || !b.s.successful))
       return;
diff --git a/src/hb-bit-set.hh b/src/hb-bit-set.hh
index 1dbcce5cb..5f4c6f0af 100644
--- a/src/hb-bit-set.hh
+++ b/src/hb-bit-set.hh
@@ -38,10 +38,10 @@ struct hb_bit_set_t
   ~hb_bit_set_t () = default;
 
   hb_bit_set_t (const hb_bit_set_t& other) : hb_bit_set_t () { set (other, true); }
-  hb_bit_set_t ( hb_bit_set_t&& other) : hb_bit_set_t () { hb_swap (*this, other); }
+  hb_bit_set_t ( hb_bit_set_t&& other)  noexcept : hb_bit_set_t () { hb_swap (*this, other); }
   hb_bit_set_t& operator= (const hb_bit_set_t& other) { set (other); return *this; }
-  hb_bit_set_t& operator= (hb_bit_set_t&& other) { hb_swap (*this, other); return *this; }
-  friend void swap (hb_bit_set_t &a, hb_bit_set_t &b)
+  hb_bit_set_t& operator= (hb_bit_set_t&& other)  noexcept { hb_swap (*this, other); return *this; }
+  friend void swap (hb_bit_set_t &a, hb_bit_set_t &b) noexcept
   {
     if (likely (!a.successful || !b.successful))
       return;
diff --git a/src/hb-cplusplus.hh b/src/hb-cplusplus.hh
index 531ef1b7c..a640e192d 100644
--- a/src/hb-cplusplus.hh
+++ b/src/hb-cplusplus.hh
@@ -56,15 +56,15 @@ struct shared_ptr
 
   explicit shared_ptr (T *p = nullptr) : p (p) {}
   shared_ptr (const shared_ptr &o) : p (v::reference (o.p)) {}
-  shared_ptr (shared_ptr &&o) : p (o.p) { o.p = nullptr; }
+  shared_ptr (shared_ptr &&o)  noexcept : p (o.p) { o.p = nullptr; }
   shared_ptr& operator = (const shared_ptr &o) { if (p != o.p) { destroy (); p = o.p; reference (); } return *this; }
-  shared_ptr& operator = (shared_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
+  shared_ptr& operator = (shared_ptr &&o)  noexcept { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
   ~shared_ptr () { v::destroy (p); p = nullptr; }
 
   T* get() const { return p; }
 
-  void swap (shared_ptr &o) { std::swap (p, o.p); }
-  friend void swap (shared_ptr &a, shared_ptr &b) { std::swap (a.p, b.p); }
+  void swap (shared_ptr &o)  noexcept { std::swap (p, o.p); }
+  friend void swap (shared_ptr &a, shared_ptr &b)  noexcept { std::swap (a.p, b.p); }
 
   operator T * () const { return p; }
   T& operator * () const { return *get (); }
@@ -98,16 +98,16 @@ struct unique_ptr
 
   explicit unique_ptr (T *p = nullptr) : p (p) {}
   unique_ptr (const unique_ptr &o) = delete;
-  unique_ptr (unique_ptr &&o) : p (o.p) { o.p = nullptr; }
+  unique_ptr (unique_ptr &&o)  noexcept : p (o.p) { o.p = nullptr; }
   unique_ptr& operator = (const unique_ptr &o) = delete;
-  unique_ptr& operator = (unique_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
+  unique_ptr& operator = (unique_ptr &&o)  noexcept { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
   ~unique_ptr () { v::destroy (p); p = nullptr; }
 
   T* get() const { return p; }
   T* release () { T* v = p; p = nullptr; return v; }
 
-  void swap (unique_ptr &o) { std::swap (p, o.p); }
-  friend void swap (unique_ptr &a, unique_ptr &b) { std::swap (a.p, b.p); }
+  void swap (unique_ptr &o)  noexcept { std::swap (p, o.p); }
+  friend void swap (unique_ptr &a, unique_ptr &b)  noexcept { std::swap (a.p, b.p); }
 
   operator T * () const { return p; }
   T& operator * () const { return *get (); }
diff --git a/src/hb-map.hh b/src/hb-map.hh
index db0ef78df..6521b1a41 100644
--- a/src/hb-map.hh
+++ b/src/hb-map.hh
@@ -70,9 +70,9 @@ struct hb_hashmap_t
 
     alloc (o.population); hb_copy (o, *this);
   }
-  hb_hashmap_t (hb_hashmap_t&& o) : hb_hashmap_t () { hb_swap (*this, o); }
+  hb_hashmap_t (hb_hashmap_t&& o)  noexcept : hb_hashmap_t () { hb_swap (*this, o); }
   hb_hashmap_t& operator= (const hb_hashmap_t& o)  { reset (); alloc (o.population); hb_copy (o, *this); return *this; }
-  hb_hashmap_t& operator= (hb_hashmap_t&& o)  { hb_swap (*this, o); return *this; }
+  hb_hashmap_t& operator= (hb_hashmap_t&& o)   noexcept { hb_swap (*this, o); return *this; }
 
   hb_hashmap_t (std::initializer_list<hb_pair_t<K, V>> lst) : hb_hashmap_t ()
   {
@@ -145,7 +145,7 @@ struct hb_hashmap_t
   unsigned int prime;
   item_t *items;
 
-  friend void swap (hb_hashmap_t& a, hb_hashmap_t& b)
+  friend void swap (hb_hashmap_t& a, hb_hashmap_t& b) noexcept
   {
     if (unlikely (!a.successful || !b.successful))
       return;
@@ -555,7 +555,7 @@ struct hb_map_t : hb_hashmap_t<hb_codepoint_t,
   ~hb_map_t () = default;
   hb_map_t () : hashmap () {}
   hb_map_t (const hb_map_t &o) : hashmap ((hashmap &) o) {}
-  hb_map_t (hb_map_t &&o) : hashmap (std::move ((hashmap &) o)) {}
+  hb_map_t (hb_map_t &&o)  noexcept : hashmap (std::move ((hashmap &) o)) {}
   hb_map_t& operator= (const hb_map_t&) = default;
   hb_map_t& operator= (hb_map_t&&) = default;
   hb_map_t (std::initializer_list<hb_codepoint_pair_t> lst) : hashmap (lst) {}
diff --git a/src/hb-ot-var-common.hh b/src/hb-ot-var-common.hh
index 6a576d6f6..379e16405 100644
--- a/src/hb-ot-var-common.hh
+++ b/src/hb-ot-var-common.hh
@@ -461,7 +461,7 @@ struct tuple_delta_t
   tuple_delta_t () = default;
   tuple_delta_t (const tuple_delta_t& o) = default;
 
-  friend void swap (tuple_delta_t& a, tuple_delta_t& b)
+  friend void swap (tuple_delta_t& a, tuple_delta_t& b) noexcept
   {
     hb_swap (a.axis_tuples, b.axis_tuples);
     hb_swap (a.indices, b.indices);
@@ -472,10 +472,10 @@ struct tuple_delta_t
     hb_swap (a.compiled_peak_coords, b.compiled_peak_coords);
   }
 
-  tuple_delta_t (tuple_delta_t&& o) : tuple_delta_t ()
+  tuple_delta_t (tuple_delta_t&& o)  noexcept : tuple_delta_t ()
   { hb_swap (*this, o); }
 
-  tuple_delta_t& operator = (tuple_delta_t&& o)
+  tuple_delta_t& operator = (tuple_delta_t&& o) noexcept
   {
     hb_swap (*this, o);
     return *this;
diff --git a/src/hb-priority-queue.hh b/src/hb-priority-queue.hh
index 9b962a29d..274d5df4c 100644
--- a/src/hb-priority-queue.hh
+++ b/src/hb-priority-queue.hh
@@ -163,7 +163,7 @@ struct hb_priority_queue_t
     goto repeat;
   }
 
-  void swap (unsigned a, unsigned b)
+  void swap (unsigned a, unsigned b) noexcept
   {
     assert (a < heap.length);
     assert (b < heap.length);
diff --git a/src/hb-serialize.hh b/src/hb-serialize.hh
index e31239f79..73634e6b9 100644
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@@ -91,7 +91,7 @@ struct hb_serialize_context_t
     }
 #endif
 
-    friend void swap (object_t& a, object_t& b)
+    friend void swap (object_t& a, object_t& b) noexcept
     {
       hb_swap (a.head, b.head);
       hb_swap (a.tail, b.tail);
diff --git a/src/hb-set.hh b/src/hb-set.hh
index ff2a170d2..ce69ea2c9 100644
--- a/src/hb-set.hh
+++ b/src/hb-set.hh
@@ -44,10 +44,10 @@ struct hb_sparseset_t
   ~hb_sparseset_t () { fini (); }
 
   hb_sparseset_t (const hb_sparseset_t& other) : hb_sparseset_t () { set (other); }
-  hb_sparseset_t (hb_sparseset_t&& other) : hb_sparseset_t () { s = std::move (other.s); }
+  hb_sparseset_t (hb_sparseset_t&& other)  noexcept : hb_sparseset_t () { s = std::move (other.s); }
   hb_sparseset_t& operator = (const hb_sparseset_t& other) { set (other); return *this; }
-  hb_sparseset_t& operator = (hb_sparseset_t&& other) { s = std::move (other.s); return *this; }
-  friend void swap (hb_sparseset_t& a, hb_sparseset_t& b) { hb_swap (a.s, b.s); }
+  hb_sparseset_t& operator = (hb_sparseset_t&& other)  noexcept { s = std::move (other.s); return *this; }
+  friend void swap (hb_sparseset_t& a, hb_sparseset_t& b)  noexcept { hb_swap (a.s, b.s); }
 
   hb_sparseset_t (std::initializer_list<hb_codepoint_t> lst) : hb_sparseset_t ()
   {
@@ -166,7 +166,7 @@ struct hb_set_t : hb_sparseset_t<hb_bit_set_invertible_t>
   ~hb_set_t () = default;
   hb_set_t () : sparseset () {};
   hb_set_t (const hb_set_t &o) : sparseset ((sparseset &) o) {};
-  hb_set_t (hb_set_t&& o) : sparseset (std::move ((sparseset &) o)) {}
+  hb_set_t (hb_set_t&& o)  noexcept : sparseset (std::move ((sparseset &) o)) {}
   hb_set_t& operator = (const hb_set_t&) = default;
   hb_set_t& operator = (hb_set_t&&) = default;
   hb_set_t (std::initializer_list<hb_codepoint_t> lst) : sparseset (lst) {}
diff --git a/src/hb-vector.hh b/src/hb-vector.hh
index dfe1b7d1c..c0cc7063f 100644
--- a/src/hb-vector.hh
+++ b/src/hb-vector.hh
@@ -78,7 +78,7 @@ struct hb_vector_t
     if (unlikely (in_error ())) return;
     copy_array (o);
   }
-  hb_vector_t (hb_vector_t &&o)
+  hb_vector_t (hb_vector_t &&o) noexcept
   {
     allocated = o.allocated;
     length = o.length;
@@ -122,7 +122,7 @@ struct hb_vector_t
     resize (0);
   }
 
-  friend void swap (hb_vector_t& a, hb_vector_t& b)
+  friend void swap (hb_vector_t& a, hb_vector_t& b) noexcept
   {
     hb_swap (a.allocated, b.allocated);
     hb_swap (a.length, b.length);
@@ -139,7 +139,7 @@ struct hb_vector_t
 
     return *this;
   }
-  hb_vector_t& operator = (hb_vector_t &&o)
+  hb_vector_t& operator = (hb_vector_t &&o) noexcept
   {
     hb_swap (*this, o);
     return *this;