Add a program function

Fixes 323. Adds a function to retrieve the program name.

CHANGELOG.md

@@ -3,6 +3,12 @@
 This is the changelog for `cxxopts`, a C++11 library for parsing command line
 options. The project adheres to semantic versioning.
 
+## Unreleased
+
+### Added
+
+* Add a `program()` function to retrieve the program name.
+
 ## 3.0
 
 ### Changed

include/cxxopts.hpp

@@ -1825,6 +1825,11 @@ namespace cxxopts
     const HelpGroupDetails&
     group_help(const std::string& group) const;
 
+    const std::string& program() const
+    {
+      return m_program;
+    }
+
     private:
 
     void

test/options.cpp

@@ -95,6 +95,8 @@ TEST_CASE("Basic options", "[options]")
   CHECK(arguments[3].key() == "av");
 
   CHECK_THROWS_AS(result["nothing"].as<std::string>(), cxxopts::option_has_no_value_exception&);
+
+  CHECK(options.program() == "tester");
 }
 
 TEST_CASE("Short options", "[options]")