[lldb][Lanugage][NFC] Adapt Language::ForEach to IterationAction

lldb/include/lldb/Target/Language.h

@@ -166,7 +166,7 @@ class Language : public PluginInterface {
                               llvm::StringRef file_path);
 
   // return false from callback to stop iterating
-  static void ForEach(std::function<bool(Language *)> callback);
+  static void ForEach(llvm::function_ref<IterationAction(Language *)> callback);
 
   virtual lldb::LanguageType GetLanguageType() const = 0;
 
@@ -420,7 +420,8 @@ class Language : public PluginInterface {
                                                     llvm::StringRef suffix);
 
   // return false from callback to stop iterating
-  static void ForAllLanguages(std::function<bool(lldb::LanguageType)> callback);
+  static void ForAllLanguages(
+      llvm::function_ref<IterationAction(lldb::LanguageType)> callback);
 
   static bool LanguageIsCPlusPlus(lldb::LanguageType language);
 

lldb/source/Breakpoint/BreakpointResolverName.cpp

@@ -233,7 +233,7 @@ void BreakpointResolverName::AddNameLookup(ConstString name,
         m_lookups.emplace_back(variant_lookup);
       }
     }
-    return true;
+    return IterationAction::Continue;
   };
 
   if (Language *lang = Language::FindPlugin(m_language)) {

lldb/source/Commands/CommandObjectType.cpp

@@ -2610,7 +2610,7 @@ class CommandObjectTypeLookup : public CommandObjectRaw {
     Language::ForEach([&](Language *lang) {
       if (const char *help = lang->GetLanguageSpecificTypeLookupHelp())
         stream.Printf("%s\n", help);
-      return true;
+      return IterationAction::Continue;
     });
 
     m_cmd_help_long = std::string(stream.GetString());
@@ -2649,7 +2649,7 @@ class CommandObjectTypeLookup : public CommandObjectRaw {
              (m_command_options.m_language == eLanguageTypeUnknown))) {
       Language::ForEach([&](Language *lang) {
         languages.push_back(lang);
-        return true;
+        return IterationAction::Continue;
       });
     } else {
       languages.push_back(Language::FindPlugin(m_command_options.m_language));

lldb/source/Core/Mangled.cpp

@@ -428,9 +428,9 @@ lldb::LanguageType Mangled::GuessLanguage() const {
   Language::ForEach([this, &result](Language *l) {
     if (l->SymbolNameFitsToLanguage(*this)) {
       result = l->GetLanguageType();
-      return false;
+      return IterationAction::Stop;
     }
-    return true;
+    return IterationAction::Continue;
   });
   return result;
 }

lldb/source/Symbol/Symtab.cpp

@@ -289,7 +289,7 @@ void Symtab::InitNameIndexes() {
     std::vector<Language *> languages;
     Language::ForEach([&languages](Language *l) {
       languages.push_back(l);
-      return true;
+      return IterationAction::Continue;
     });
 
     auto &name_to_index = GetNameToSymbolIndexMap(lldb::eFunctionNameTypeNone);

lldb/source/Target/Language.cpp

@@ -111,9 +111,9 @@ Language *Language::FindPlugin(llvm::StringRef file_path) {
   ForEach([&result, file_path](Language *language) {
     if (language->IsSourceFile(file_path)) {
       result = language;
-      return false;
+      return IterationAction::Stop;
     }
-    return true;
+    return IterationAction::Continue;
   });
   return result;
 }
@@ -128,7 +128,8 @@ Language *Language::FindPlugin(LanguageType language,
   return result;
 }
 
-void Language::ForEach(std::function<bool(Language *)> callback) {
+void Language::ForEach(
+    llvm::function_ref<IterationAction(Language *)> callback) {
   // If we want to iterate over all languages, we first have to complete the
   // LanguagesMap.
   static llvm::once_flag g_initialize;
@@ -153,7 +154,7 @@ void Language::ForEach(std::function<bool(Language *)> callback) {
   }
 
   for (auto *lang : loaded_plugins) {
-    if (!callback(lang))
+    if (callback(lang) == IterationAction::Stop)
       break;
   }
 }
@@ -289,9 +290,9 @@ void Language::PrintAllLanguages(Stream &s, const char *prefix,
 }
 
 void Language::ForAllLanguages(
-    std::function<bool(lldb::LanguageType)> callback) {
+    llvm::function_ref<IterationAction(lldb::LanguageType)> callback) {
   for (uint32_t i = 1; i < num_languages; i++) {
-    if (!callback(language_names[i].type))
+    if (callback(language_names[i].type) == IterationAction::Stop)
       break;
   }
 }
@@ -416,7 +417,7 @@ std::set<lldb::LanguageType> Language::GetSupportedLanguages() {
   std::set<lldb::LanguageType> supported_languages;
   ForEach([&](Language *lang) {
     supported_languages.emplace(lang->GetLanguageType());
-    return true;
+    return IterationAction::Continue;
   });
   return supported_languages;
 }