Put input files into a std::vector<filesystem::path>.

We need that for supporting recursive directory search later.

#
# Previous commits:
#   29ae22c Make regex const.
#   8ed72af Update german translation.
#   a3b0964 Remove old comment.
#   d107ce5 Modify config file example.

src/main.cpp

@@ -78,12 +78,17 @@ int main(int argc, char *argv[])
         return EXIT_SUCCESS;
     }
 
+    vector<fs::path> input_files;
     if (vm.count("input-file") == 0)
     {
         cout << "NO INPUT FILE\n";
         // TODO: Read data from stdin.
         return EXIT_FAILURE;
     }
+    for (const auto &filepath : vm["input-file"].as<vector<string>>())
+    {
+        input_files.emplace_back(filepath);
+    }
 
     int return_code{EXIT_SUCCESS};
 
@@ -118,7 +123,7 @@ int main(int argc, char *argv[])
     vector<std::future<int>> futurepool;
 
     auto search_file{
-        [&vm, &matches_all, &opts](std::string_view filepath)
+        [&vm, &matches_all, &opts](fs::path filepath)
         {
             for (const auto &regex : vm["regexp"].as<vector<string>>())
             {
@@ -172,7 +177,7 @@ int main(int argc, char *argv[])
             return static_cast<std::uint32_t>(std::ceil(n / 2 + n / 4));
         }()};
 
-    for (const auto &filepath : vm["input-file"].as<vector<string>>())
+    for (const auto &filepath : input_files)
     {
         if (futurepool.size() >= max_threads)
         {