Added default std argument to CompileCommands::get_arguments when no compilation database is found

libclangmm

@@ -1 +1 @@
-Subproject commit 5f60c3a456154ad4c5ef25103f3865668d1f64eb
+Subproject commit 684657732bff4fb8b5f4e7099111d633060ab774

src/compile_commands.cc

@@ -81,9 +81,12 @@ CompileCommands::CompileCommands(const boost::filesystem::path &build_path) {
 }
 
 std::vector<std::string> CompileCommands::get_arguments(const boost::filesystem::path &build_path, const boost::filesystem::path &file_path) {
+  std::string default_std_argument="-std=c++1y";
+  
   std::vector<std::string> arguments;
   if(!build_path.empty()) {
     clangmm::CompilationDatabase db(build_path.string());
+    if(db) {
       clangmm::CompileCommands commands(file_path.string(), db);
       auto cmds = commands.get_commands();
       for (auto &cmd : cmds) {
@@ -102,6 +105,12 @@ std::vector<std::string> CompileCommands::get_arguments(const boost::filesystem:
         }
       }
     }
+    else
+      arguments.emplace_back(default_std_argument);
+  }
+  else
+    arguments.emplace_back(default_std_argument);
+  
   auto clang_version_string=clangmm::to_string(clang_getClangVersion());
   const static std::regex clang_version_regex("^[A-Za-z ]+([0-9.]+).*$");
   std::smatch sm;