Initial commit

Only a basic argument parser to start with.

1 files changed, 70 insertions, 0 deletions

diff --git a/src/args.hh b/src/args.hh
new file mode 100644
index 0000000..75c31b1
--- /dev/null
+++ b/src/args.hh
@@ -0,0 +1,70 @@
+#ifndef ARGS_HH
+#define ARGS_HH
+
+#include <cstdint>
+#include <iosfwd>
+#include <memory>
+#include <string>
+#include <string_view>
+#include <vector>
+
+class Args {
+ public:
+  virtual ~Args() = default;
+
+  class Option {
+   public:
+    virtual ~Option() = default;
+
+    virtual bool is_set() const = 0;
+
+   protected:
+    Option() = default;
+    Option(Option const&) = delete;
+    Option& operator=(Option const&) = delete;
+  };
+
+  class OptionArgument : public Option {
+   public:
+    virtual bool has_argument() const = 0;
+    virtual const std::string& argument() const = 0;
+  };
+
+  static std::unique_ptr<Args> create(std::string prgname = std::string());
+
+  virtual std::shared_ptr<Option> option(
+      char shortname,
+      std::string longname = std::string(),
+      std::string help = std::string()) = 0;
+
+  std::shared_ptr<Option> option(
+      std::string longname,
+      std::string help = std::string());
+
+  virtual std::shared_ptr<OptionArgument> option_argument(
+      char shortname,
+      std::string longname = std::string(),
+      std::string arg = std::string(),
+      std::string help = std::string(),
+      bool required = true) = 0;
+
+  std::shared_ptr<OptionArgument> option_argument(
+      std::string longname,
+      std::string arg = std::string(),
+      std::string help = std::string(),
+      bool required = true);
+
+  virtual bool run(int argc, char** argv,
+                   std::vector<std::string_view>* arguments = nullptr) = 0;
+
+  virtual void print_error(std::ostream& out) const = 0;
+
+  virtual void print_help(std::ostream& out, uint32_t width = 79) const = 0;
+
+ protected:
+  Args() = default;
+  Args(Args const&) = delete;
+  Args& operator=(Args const&) = delete;
+};
+
+#endif  // ARGS_HH