+ void log_file_option(Application& app, const std::string& arg)
+ {
+ if (arg.empty() == false)
+ {
+ std::string buffer("--log-file=");
+ buffer+= arg;
+ app.add_option("--verbose");
+ app.add_option(buffer);
+ }
+ }
+
+ bool has_log_file_option() const
+ {
+ return true;
+ }
+