When indexing make sure we use the correct contents.

Hopefully this will make overlapping saves more robust.

src/command_line.cc

@@ -1006,7 +1006,8 @@ void ParseFile(IndexerConfig* config,
 
   std::vector<std::unique_ptr<IndexFile>> indexes = Parse(
     config, file_consumer_shared,
-    tu_path, tu_args);
+    tu_path, tu_args,
+    entry.filename, indexed_content);
   time.ResetAndPrint("Parsing/indexing " + tu_path);
 
   for (std::unique_ptr<IndexFile>& new_index : indexes) {

src/indexer.cc

@@ -1380,6 +1380,8 @@ std::vector<std::unique_ptr<IndexFile>> Parse(
     IndexerConfig* config, FileConsumer::SharedState* file_consumer_shared,
     std::string file,
     std::vector<std::string> args,
+    const std::string& file_contents_path,
+    const optional<std::string>& file_contents,
     bool dump_ast) {
 
   if (!config->enableIndexing)
@@ -1390,6 +1392,13 @@ std::vector<std::unique_ptr<IndexFile>> Parse(
   clang::Index index(0 /*excludeDeclarationsFromPCH*/,
                      0 /*displayDiagnostics*/);
   std::vector<CXUnsavedFile> unsaved_files;
+  if (file_contents) {
+    CXUnsavedFile unsaved;
+    unsaved.Filename = file_contents_path.c_str();
+    unsaved.Contents = file_contents->c_str();
+    unsaved.Length = file_contents->size();
+    unsaved_files.push_back(unsaved);
+  }
   clang::TranslationUnit tu(index, file, args, unsaved_files, CXTranslationUnit_KeepGoing);
 
   if (dump_ast)

src/indexer.h

@@ -506,5 +506,7 @@ std::vector<std::unique_ptr<IndexFile>> Parse(
     IndexerConfig* config, FileConsumer::SharedState* file_consumer_shared,
     std::string file,
     std::vector<std::string> args,
+    const std::string& file_contents_path,
+    const optional<std::string>& file_contents,
     bool dump_ast = false);
 void IndexInit();

src/test.cc

@@ -148,6 +148,7 @@ void RunTests() {
           "-IC:/Users/jacob/Desktop/superindex/indexer/third_party/rapidjson/include",
           "-IC:/Users/jacob/Desktop/superindex/indexer/src"
         },
+        "", nullopt,
         false /*dump_ast*/);
 
 #if false