First sketch of the ArgumentParser class

src/argparse.hpp

@@ -0,0 +1,14 @@
+#include <string>
+
+namespace argparse {
+
+class ArgumentParser {
+  public:
+    ArgumentParser(const std::string& program_name) :
+      program_name_(program_name) {}
+
+  private:
+    std::string program_name_;
+};
+
+}

tests/main.cpp

@@ -0,0 +1,5 @@
+#include <argparse.hpp>
+
+int main() {
+  return 0;
+}