[clang-tidy] use auto

Found with modernize-use-auto

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/directives.cpp

@@ -5,7 +5,7 @@ Directives::Directives() : version{true, 1, 2}, tags{} {}
 
 const std::string Directives::TranslateTagHandle(
     const std::string& handle) const {
-  std::map<std::string, std::string>::const_iterator it = tags.find(handle);
+  auto it = tags.find(handle);
   if (it == tags.end()) {
     if (handle == "!!")
       return "tag:yaml.org,2002:";

src/node_data.cpp

@@ -109,9 +109,9 @@ void node_data::compute_seq_size() const {
 }
 
 void node_data::compute_map_size() const {
-  kv_pairs::iterator it = m_undefinedPairs.begin();
+  auto it = m_undefinedPairs.begin();
   while (it != m_undefinedPairs.end()) {
-    kv_pairs::iterator jt = std::next(it);
+    auto jt = std::next(it);
     if (it->first->is_defined() && it->second->is_defined())
       m_undefinedPairs.erase(it);
     it = jt;
@@ -209,7 +209,7 @@ node* node_data::get(node& key, shared_memory_holder /* pMemory */) const {
     return nullptr;
   }
 
-  for (node_map::const_iterator it = m_map.begin(); it != m_map.end(); ++it) {
+  for (auto it = m_map.begin(); it != m_map.end(); ++it) {
     if (it->first->is(key))
       return it->second;
   }
@@ -244,15 +244,14 @@ bool node_data::remove(node& key, shared_memory_holder /* pMemory */) {
   if (m_type != NodeType::Map)
     return false;
 
-  for (kv_pairs::iterator it = m_undefinedPairs.begin();
+  for (auto it = m_undefinedPairs.begin(); it != m_undefinedPairs.end();) {
-       it != m_undefinedPairs.end();) {
+    auto jt = std::next(it);
-    kv_pairs::iterator jt = std::next(it);
     if (it->first->is(key))
       m_undefinedPairs.erase(it);
     it = jt;
   }
 
-  for (node_map::iterator it = m_map.begin(); it != m_map.end(); ++it) {
+  for (auto it = m_map.begin(); it != m_map.end(); ++it) {
     if (it->first->is(key)) {
       m_map.erase(it);
       return true;

src/nodeevents.cpp

@@ -13,7 +13,7 @@ void NodeEvents::AliasManager::RegisterReference(const detail::node& node) {
 
 anchor_t NodeEvents::AliasManager::LookupAnchor(
     const detail::node& node) const {
-  AnchorByIdentity::const_iterator it = m_anchorByIdentity.find(node.ref());
+  auto it = m_anchorByIdentity.find(node.ref());
   if (it == m_anchorByIdentity.end())
     return 0;
   return it->second;
@@ -95,7 +95,7 @@ void NodeEvents::Emit(const detail::node& node, EventHandler& handler,
 }
 
 bool NodeEvents::IsAliased(const detail::node& node) const {
-  RefCount::const_iterator it = m_refCount.find(node.ref());
+  auto it = m_refCount.find(node.ref());
   return it != m_refCount.end() && it->second > 1;
 }
 }  // namespace YAML

src/singledocparser.cpp

@@ -422,7 +422,7 @@ anchor_t SingleDocParser::RegisterAnchor(const std::string& name) {
 
 anchor_t SingleDocParser::LookupAnchor(const Mark& mark,
                                        const std::string& name) const {
-  Anchors::const_iterator it = m_anchors.find(name);
+  auto it = m_anchors.find(name);
   if (it == m_anchors.end())
     throw ParserException(mark, ErrorMsg::UNKNOWN_ANCHOR);
 

src/stream.cpp

@@ -151,7 +151,7 @@ inline UtfIntroCharType IntroCharTypeOf(std::istream::int_type ch) {
 
 inline char Utf8Adjust(unsigned long ch, unsigned char lead_bits,
                        unsigned char rshift) {
-  const unsigned char header =
+  const auto header =
       static_cast<unsigned char>(((1 << lead_bits) - 1) << (8 - lead_bits));
   const unsigned char mask = (0xFF >> (lead_bits + 1));
   return static_cast<char>(