diff options
| -rw-r--r-- | libbutl/process.mxx | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libbutl/process.mxx b/libbutl/process.mxx index 4faa808..39a5d92 100644 --- a/libbutl/process.mxx +++ b/libbutl/process.mxx @@ -487,7 +487,7 @@ LIBBUTL_MODEXPORT namespace butl // The A arguments can be anything convertible to const char* via the // overloaded process_arg_as() (see below). Out of the box you can use const // char*, std::string, path/dir_path, (as well as [small_]vector[_view] of - // these), and numeric types. + // these), and numeric types (as well as optional<T> of all the above). // struct process_env { @@ -660,6 +660,14 @@ LIBBUTL_MODEXPORT namespace butl v.push_back (process_arg_as (x, storage)); } + template <typename V, typename T> + inline void + process_args_as (V& v, const optional<T>& x, std::string& storage) + { + if (x) + process_args_as (v, *x, storage); + } + // [small_]vector[_view]<> // template <typename V> |