Fix clang-tidy modernize-pass-by-value findings

.clang-tidy

@@ -5,6 +5,7 @@ Checks: [-*,
          modernize-loop-convert,
          modernize-make-unique,
          modernize-min-max-use-initializer-list,
+         modernize-pass-by-value,
 
          # Enable a very limited number of the cppcoreguidelines checkers.
          # See the notes for some of the rest of them below.

src/EventTrace.cc

@@ -51,7 +51,7 @@ static std::string escape_string(const u_char* b, int len) {
     return res + "\"";
 }
 
-ValTrace::ValTrace(const ValPtr& _v) : v(_v) {
+ValTrace::ValTrace(ValPtr _v) : v(std::move(_v)) {
     t = v->GetType();
 
     switch ( t->Tag() ) {

src/EventTrace.h

@@ -45,7 +45,7 @@ using DeltaVector = std::vector<std::unique_ptr<ValDelta>>;
 // be readily compared against future instances.
 class ValTrace {
 public:
-    ValTrace(const ValPtr& v);
+    ValTrace(ValPtr v);
     ~ValTrace() = default;
 
     const ValPtr& GetVal() const { return v; }

src/file_analysis/Analyzer.cc

@@ -24,7 +24,7 @@ void Analyzer::SetAnalyzerTag(const zeek::Tag& arg_tag) {
 }
 
 Analyzer::Analyzer(zeek::Tag arg_tag, RecordValPtr arg_args, File* arg_file)
-    : tag(arg_tag),
+    : tag(std::move(arg_tag)),
       args(std::move(arg_args)),
       file(arg_file),
       got_stream_delivery(false),

src/file_analysis/FileTimer.cc

@@ -7,8 +7,8 @@
 
 namespace zeek::file_analysis::detail {
 
-FileTimer::FileTimer(double t, const std::string& id, double interval)
-    : zeek::detail::Timer(t + interval, zeek::detail::TIMER_FILE_ANALYSIS_INACTIVITY), file_id(id) {
+FileTimer::FileTimer(double t, std::string id, double interval)
+    : zeek::detail::Timer(t + interval, zeek::detail::TIMER_FILE_ANALYSIS_INACTIVITY), file_id(std::move(id)) {
     DBG_LOG(DBG_FILE_ANALYSIS, "New %f second timeout timer for %s", interval, file_id.c_str());
 }
 

src/file_analysis/FileTimer.h

@@ -19,7 +19,7 @@ public:
      * @param id the file identifier which will be checked for inactivity.
      * @param interval amount of time after \a t to check for inactivity.
      */
-    FileTimer(double t, const std::string& id, double interval);
+    FileTimer(double t, std::string id, double interval);
 
     /**
      * Check inactivity of file_analysis::File corresponding to #file_id,

src/file_analysis/analyzer/extract/Extract.cc

@@ -11,10 +11,10 @@
 
 namespace zeek::file_analysis::detail {
 
-Extract::Extract(RecordValPtr args, file_analysis::File* file, const std::string& arg_filename, uint64_t arg_limit,
+Extract::Extract(RecordValPtr args, file_analysis::File* file, std::string arg_filename, uint64_t arg_limit,
                  bool arg_limit_includes_missing)
     : file_analysis::Analyzer(file_mgr->GetComponentTag("EXTRACT"), std::move(args), file),
-      filename(arg_filename),
+      filename(std::move(arg_filename)),
       limit(arg_limit),
       written(0),
       limit_includes_missing(arg_limit_includes_missing) {

src/file_analysis/analyzer/extract/Extract.h

@@ -64,7 +64,7 @@ protected:
      * @param arg_limit the maximum allowed file size.
      * @param arg_limit_includes_missing missing bytes count towards limit if true.
      */
-    Extract(RecordValPtr args, file_analysis::File* file, const std::string& arg_filename, uint64_t arg_limit,
+    Extract(RecordValPtr args, file_analysis::File* file, std::string arg_filename, uint64_t arg_limit,
             bool arg_limit_includes_missing);
 
 private:

src/input/readers/ascii/Ascii.cc

@@ -17,17 +17,14 @@ using zeek::threading::Value;
 
 namespace zeek::input::reader::detail {
 
-FieldMapping::FieldMapping(const string& arg_name, const TypeTag& arg_type, int arg_position)
-    : name(arg_name), type(arg_type), subtype(TYPE_ERROR) {
-    position = arg_position;
+FieldMapping::FieldMapping(string arg_name, const TypeTag& arg_type, int arg_position)
+    : name(std::move(arg_name)), type(arg_type), subtype(TYPE_ERROR), position(arg_position) {
     secondary_position = -1;
     present = true;
 }
 
-FieldMapping::FieldMapping(const string& arg_name, const TypeTag& arg_type, const TypeTag& arg_subtype,
-                           int arg_position)
-    : name(arg_name), type(arg_type), subtype(arg_subtype) {
-    position = arg_position;
+FieldMapping::FieldMapping(string arg_name, const TypeTag& arg_type, const TypeTag& arg_subtype, int arg_position)
+    : name(std::move(arg_name)), type(arg_type), subtype(arg_subtype), position(arg_position) {
     secondary_position = -1;
     present = true;
 }

src/input/readers/ascii/Ascii.h

@@ -23,8 +23,8 @@ struct FieldMapping {
     int secondary_position = -1; // for ports: pos of the second field
     bool present = false;
 
-    FieldMapping(const std::string& arg_name, const TypeTag& arg_type, int arg_position);
-    FieldMapping(const std::string& arg_name, const TypeTag& arg_type, const TypeTag& arg_subtype, int arg_position);
+    FieldMapping(std::string arg_name, const TypeTag& arg_type, int arg_position);
+    FieldMapping(std::string arg_name, const TypeTag& arg_type, const TypeTag& arg_subtype, int arg_position);
 
     FieldMapping(const FieldMapping& arg);
     FieldMapping() = default;

src/logging/Manager.cc

@@ -108,8 +108,8 @@ class DelayInfo {
 public:
     static const DelayInfoPtr nil;
 
-    explicit DelayInfo(const WriteContext& ctx, const zeek::ValPtr token_val, double expire_time)
-        : ctx(ctx), token_val(token_val), expire_time(expire_time) {}
+    explicit DelayInfo(WriteContext ctx, const zeek::ValPtr token_val, double expire_time)
+        : ctx(std::move(ctx)), token_val(token_val), expire_time(expire_time) {}
 
     // No copy or assignment of DelayInfo itself, should
     // always be managed through a shared pointer.

src/plugin/Component.cc

@@ -11,9 +11,8 @@ namespace zeek::plugin {
 
 Tag::type_t Component::type_counter(0);
 
-Component::Component(component::Type arg_type, const std::string& arg_name, Tag::subtype_t tag_subtype,
-                     EnumTypePtr etype)
-    : type(arg_type), name(arg_name), tag(etype, 1, 0), etype(std::move(etype)), tag_subtype(tag_subtype) {
+Component::Component(component::Type arg_type, std::string arg_name, Tag::subtype_t tag_subtype, EnumTypePtr etype)
+    : type(arg_type), name(std::move(arg_name)), tag(etype, 1, 0), etype(std::move(etype)), tag_subtype(tag_subtype) {
     canon_name = util::canonify_name(name);
     canon_name_val = make_intrusive<StringVal>(canon_name);
 }

src/plugin/Component.h

@@ -66,8 +66,7 @@ public:
      * @param etype An enum type that describes the type for the tag in
      * script-land.
      */
-    Component(component::Type type, const std::string& name, Tag::subtype_t tag_subtype = 0,
-              EnumTypePtr etype = nullptr);
+    Component(component::Type type, std::string name, Tag::subtype_t tag_subtype = 0, EnumTypePtr etype = nullptr);
 
     /**
      * Destructor.

src/storage/backend/redis/Redis.cc

@@ -21,8 +21,8 @@ namespace {
 
 class Tracer {
 public:
-    Tracer(const std::string& where) : where(where) {} // DBG_LOG(zeek::DBG_STORAGE, "%s", where.c_str()); }
-    ~Tracer() {}                                       // DBG_LOG(zeek::DBG_STORAGE, "%s done", where.c_str()); }
+    Tracer(std::string where) : where(std::move(where)) {} // DBG_LOG(zeek::DBG_STORAGE, "%s", where.c_str()); }
+    ~Tracer() {}                                           // DBG_LOG(zeek::DBG_STORAGE, "%s done", where.c_str()); }
     std::string where;
 };
 

src/zeekygen/Configuration.cc

@@ -29,8 +29,8 @@ static TargetFactory create_target_factory() {
     return rval;
 }
 
-Config::Config(const string& arg_file, const string& delim)
-    : file(arg_file), targets(), target_factory(create_target_factory()) {
+Config::Config(string arg_file, const string& delim)
+    : file(std::move(arg_file)), targets(), target_factory(create_target_factory()) {
     if ( file.empty() )
         return;
 

src/zeekygen/Configuration.h

@@ -26,7 +26,7 @@ public:
      * an empty string most methods are a no-op.
      * @param delim The delimiter between target fields.
      */
-    explicit Config(const std::string& file, const std::string& delim = "\t");
+    explicit Config(std::string file, const std::string& delim = "\t");
 
     /**
      * Destructor, cleans up targets created when parsing config file.

src/zeekygen/PackageInfo.cc

@@ -12,7 +12,7 @@ using namespace std;
 
 namespace zeek::zeekygen::detail {
 
-PackageInfo::PackageInfo(const string& arg_name) : Info(), pkg_name(arg_name), readme() {
+PackageInfo::PackageInfo(string arg_name) : Info(), pkg_name(std::move(arg_name)), readme() {
     string readme_file = util::find_file(pkg_name + "/README", util::zeek_path());
 
     if ( readme_file.empty() )

src/zeekygen/PackageInfo.h

@@ -20,7 +20,7 @@ public:
      * @param name The name of the Zeek script package (relative path from a
      * component within ZEEKPATH).
      */
-    explicit PackageInfo(const std::string& name);
+    explicit PackageInfo(std::string name);
 
     /**
      * @return The content of the package's README file, each line being

src/zeekygen/ScriptInfo.cc

@@ -221,10 +221,10 @@ static string make_redef_details(const string& heading, char underline, const id
     return rval;
 }
 
-ScriptInfo::ScriptInfo(const string& arg_name, const string& arg_path)
+ScriptInfo::ScriptInfo(string arg_name, string arg_path)
     : Info(),
-      name(arg_name),
-      path(arg_path),
+      name(std::move(arg_name)),
+      path(std::move(arg_path)),
       is_pkg_loader(util::detail::is_package_loader(name)),
       dependencies(),
       module_usages(),

src/zeekygen/ScriptInfo.h

@@ -32,7 +32,7 @@ public:
      * @param name Name of script: a path relative to a component in ZEEKPATH.
      * @param path Absolute path to the script.
      */
-    ScriptInfo(const std::string& name, const std::string& path);
+    ScriptInfo(std::string name, std::string path);
 
     /**
      * Associate a Zeekygen summary comment ("##!") with the script.

src/zeekygen/Target.cc

@@ -189,7 +189,7 @@ static vector<T*> filter_matches(const vector<Info*>& from, Target* t) {
     return rval;
 }
 
-TargetFile::TargetFile(const string& arg_name) : name(arg_name), f() {
+TargetFile::TargetFile(string arg_name) : name(std::move(arg_name)), f() {
     if ( name.find('/') != string::npos ) {
         string dir = util::SafeDirname(name).result;
 
@@ -210,7 +210,8 @@ TargetFile::~TargetFile() {
     DBG_LOG(DBG_ZEEKYGEN, "Wrote out-of-date target '%s'", name.c_str());
 }
 
-Target::Target(const string& arg_name, const string& arg_pattern) : name(arg_name), pattern(arg_pattern), prefix() {
+Target::Target(string arg_name, string arg_pattern)
+    : name(std::move(arg_name)), pattern(std::move(arg_pattern)), prefix() {
     size_t pos = pattern.find('*');
 
     if ( pos == 0 || pos == string::npos )

src/zeekygen/Target.h

@@ -28,7 +28,7 @@ struct TargetFile {
      * directories that don't already exist.
      *
      */
-    explicit TargetFile(const std::string& arg_name);
+    explicit TargetFile(std::string arg_name);
 
     /**
      * Close the file.
@@ -53,7 +53,7 @@ public:
      * @param arg_pattern pattern of info objects the target depends upon.  Only
      * exact string and simple prefix matching is currently allowed.
      */
-    Target(const std::string& arg_name, const std::string& arg_pattern);
+    Target(std::string arg_name, std::string arg_pattern);
 
     /**
      * Dtor.