commit c31d95ab2224c90b4c3423f67f4693152f61cc14
author Marcel Hlopko <hlopko@google.com> Fri Sep 09 05:17:32 2022 -0700
committer Copybara-Service <copybara-worker@google.com> Fri Sep 09 05:17:58 2022 -0700
tree 8f035fc9cb2aab2ddd4677f486639c4b5970e1da
parent eecc285b61badd9af2f8a21cd43b28351e85201c

Report imported explicit class template instantiation definitions in the
metadata.

This will be useful for instantiating C++ class template specializations from
Rust. Actually linking requests from `cc_template!` macro to imported
specializations will come in a followup.

PiperOrigin-RevId: 473224390

rs_bindings_from_cc/generate_bindings_and_metadata.cc

diff --git a/rs_bindings_from_cc/generate_bindings_and_metadata.cc b/rs_bindings_from_cc/generate_bindings_and_metadata.cc
index cb99248..6d8ff0c 100644
--- a/rs_bindings_from_cc/generate_bindings_and_metadata.cc
+++ b/rs_bindings_from_cc/generate_bindings_and_metadata.cc
@@ -39,13 +39,21 @@
                                            cmdline.rustfmt_exe_path(),
                                            cmdline.rustfmt_config_path()));
 
+  absl::flat_hash_map<std::string, std::string> instantiations;
+  for (const auto* record : ir.get_items_if<Record>()) {
+    if (record->is_explicit_class_template_instantiation_definition) {
+      instantiations.insert({record->cc_name, record->rs_name});
+    }
+  }
+
   auto top_level_namespaces = crubit::CollectNamespaces(ir);
 
   return BindingsAndMetadata{
       .ir = ir,
       .rs_api = bindings.rs_api,
       .rs_api_impl = bindings.rs_api_impl,
-      .namespaces = top_level_namespaces,
+      .namespaces = std::move(top_level_namespaces),
+      .instantiations = std::move(instantiations),
   };
 }