positional arguments parse into multiple options

Jarryd Beck
1 parent 8844335d
Showing 2 changed files with 58 additions and 9 deletions
src/cxxopts.hpp
src/example.cpp
 /*
  
-Copyright (c) 2014 Jarryd Beck
+Copyright (c) 2014, 2015 Jarryd Beck
  
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -244,6 +244,9 @@ namespace cxxopts
     has_default() const = 0;
  
     virtual bool
+    is_container() const = 0;
+
+    virtual bool
     has_implicit() const = 0;
  
     virtual std::string
@@ -436,6 +439,18 @@ namespace cxxopts
     };
  
     template <typename T>
+    struct type_is_container
+    {
+      static constexpr bool value = false;
+    };
+
+    template <typename T>
+    struct type_is_container<std::vector<T>>
+    {
+      static constexpr bool value = true;
+    };
+
+    template <typename T>
     class standard_value : public Value
     {
       public:
@@ -463,6 +478,12 @@ namespace cxxopts
         }
       }
  
+      bool
+      is_container() const
+      {
+        return type_is_container<T>::value;
+      }
+
       void
       parse() const
       {
@@ -700,6 +721,10 @@ namespace cxxopts
     parse_positional(std::string option);
  
     inline
+    void
+    parse_positional(std::vector<std::string> options);
+
+    inline
     std::string
     help(const std::vector<std::string>& groups = {""}) const;
  
@@ -757,7 +782,8 @@ namespace cxxopts
     String m_help_string;
  
     std::map<std::string, std::shared_ptr<OptionDetails>> m_options;
-    std::string m_positional;
+    std::vector<std::string> m_positional;
+    std::vector<std::string>::iterator m_next_positional;
  
     //mapping from groups to help options
     std::map<std::string, HelpGroupDetails> m_help;
@@ -1005,9 +1031,14 @@ Options::add_to_option(const std::string&amp; option, const std::string&amp; arg)
 bool
 Options::consume_positional(std::string a)
 {
-  if (m_positional.size() > 0)
+  if (m_next_positional != m_positional.end())
   {
-    add_to_option(m_positional, a);
+    add_to_option(*m_next_positional, a);
+
+    auto iter = m_options.find(*m_next_positional);
+    if (iter != m_options.end() && !iter->second->value().is_container()) {
+      ++m_next_positional;
+    }
     return true;
   }
   else
@@ -1019,7 +1050,14 @@ Options::consume_positional(std::string a)
 void
 Options::parse_positional(std::string option)
 {
-  m_positional = std::move(option);
+  parse_positional(std::vector<std::string>{option});
+}
+
+void
+Options::parse_positional(std::vector<std::string> options)
+{
+  m_positional = std::move(options);
+  m_next_positional = m_positional.begin();
 }
  
 void
@@ -38,11 +38,12 @@ int main(int argc, char* argv[])
       ("a,apple", "an apple", cxxopts::value<bool>(apple))
       ("b,bob", "Bob")
       ("f,file", "File", cxxopts::value<std::vector<std::string>>(), "FILE")
+      ("i,input", "Input", cxxopts::value<std::string>())
       ("o,output", "Output file", cxxopts::value<std::string>()
           ->default_value("a.out")->implicit_value("b.def"), "BIN")
       ("positional", 
         "Positional arguments: these are the arguments that are entered "
-        "without an option", cxxopts::value<std::string>())
+        "without an option", cxxopts::value<std::vector<std::string>>())
       ("long-description",
         "thisisareallylongwordthattakesupthewholelineandcannotbebrokenataspace")
       ("help", "Print help")
@@ -58,7 +59,7 @@ int main(int argc, char* argv[])
       ("c,compile", "compile")
       ("d,drop", "drop", cxxopts::value<std::vector<std::string>>());
  
-    options.parse_positional("positional");
+    options.parse_positional({"input", "output", "positional"});
  
     options.parse(argc, argv);
  
@@ -88,9 +89,9 @@ int main(int argc, char* argv[])
       }
     }
  
-    if (options.count("positional"))
+    if (options.count("input"))
     {
-      std::cout << "Positional = " << options["positional"].as<std::string>()
+      std::cout << "Input = " << options["input"].as<std::string>()
         << std::endl;
     }
  
@@ -100,6 +101,16 @@ int main(int argc, char* argv[])
         << std::endl;
     }
  
+    if (options.count("positional"))
+    {
+      std::cout << "Positional = {";
+      auto& v = options["positional"].as<std::vector<std::string>>();
+      for (const auto& s : v) {
+        std::cout << s << ", ";
+      }
+      std::cout << "}" << std::endl;
+    }
+
     if (options.count("int"))
     {
       std::cout << "int = " << options["int"].as<int>() << std::endl;