Complete rewrite using C++ and with shared state support

1 files changed, 53 insertions, 0 deletions

diff --git a/src/args.hh b/src/args.hh
new file mode 100644
index 0000000..b581307
--- /dev/null
+++ b/src/args.hh
@@ -0,0 +1,53 @@
+#ifndef ARGS_HH
+#define ARGS_HH
+
+#include <iosfwd>
+#include <memory>
+#include <string>
+#include <string_view>
+#include <vector>
+
+class Option {
+public:
+  virtual ~Option() = default;
+
+  virtual bool is_set() const = 0;
+  virtual std::string const& arg() const = 0;
+
+protected:
+  Option() = default;
+  Option(Option const&) = delete;
+  Option& operator=(Option const&) = delete;
+};
+
+class Args {
+public:
+  virtual ~Args() = default;
+
+  static std::unique_ptr<Args> create();
+
+  // Returned Option is owned by Args instance.
+  virtual Option const* add_option(
+      char short_name,
+      std::string long_name,
+      std::string description) = 0;
+
+  virtual Option const* add_option_with_arg(
+      char short_name,
+      std::string long_name,
+      std::string description,
+      std::string arg_description) = 0;
+
+  virtual bool run(int argc, char** argv, std::string_view prgname,
+                   std::ostream& err, std::vector<std::string>* out) = 0;
+
+  virtual void print_descriptions(std::ostream& out,
+                                  uint32_t column_width) const = 0;
+
+protected:
+  Args() = default;
+  Args(Args const&) = delete;
+  Args& operator=(Args const&) = delete;
+};
+
+#endif  // ARGS_HH