cmcfarlen commented on code in PR #10899:
URL: https://github.com/apache/trafficserver/pull/10899#discussion_r1422780176


##########
src/tscore/Diags.cc:
##########
@@ -213,6 +214,37 @@ Diags::~Diags()
   deactivate_all(DiagsTagType_Action);
 }
 
+struct DiagTimestamp {
+  std::chrono::time_point<std::chrono::system_clock> ts = 
std::chrono::system_clock::now();
+};
+
+swoc::BufferWriter &
+bwformat(swoc::BufferWriter &w, swoc::bwf::Spec const &spec, DiagTimestamp 
const &ts)
+{
+  auto epoch = std::chrono::system_clock::to_time_t(ts.ts);
+  swoc::LocalBufferWriter<48> lw;
+
+  ctime_r(&epoch, lw.aux_data());
+  lw.commit(19); // keep only leading text.
+  lw.print(".{:03}", 
std::chrono::time_point_cast<std::chrono::milliseconds>(ts.ts).time_since_epoch().count()
 % 1000);
+  w.write(lw.view().substr(4));
+
+  return w;
+}
+
+struct DiagThreadname {
+  char name[32];
+
+  DiagThreadname() { ink_get_thread_name(name, sizeof(name)); }
+};
+
+swoc::BufferWriter &
+bwformat(swoc::BufferWriter &w, swoc::bwf::Spec const &spec, DiagThreadname 
const &n)
+{
+  bwformat(w, spec, std::string_view{n.name});
+  return w;
+}
+

Review Comment:
   It does work, but it confuses clang-tidy.  Thanks



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