Command Line Arguments Parser

Parses command line arguments passed to programs. It supports parameters with types and does type checking for each parameter. For supported types see CMD::CommandLineArgs::Type.

Currently supports only long parameter names starting with two dashes -- followed by the name of the parameter. Non flag parameters must have a value. It is passed by an equals sign with now whitespace between the equals the name of the parameter and the value of the parameter.

Positional arguments are not supported at the moment, however some arguments can be marked as required. Check CMD::CommandLineArgs::addParam to see how to add required parameter.

Usage

• Create CMD::CommandLineArgs class
• Add parameters via CMD::CommandLineArgs::addParam
• Parse the parameters passed to main via CMD::CommandLineArgs::parse
• Request parameters via CMD::CommandLineArgs::getValue

int main(int argc, char** argv) {
  using namespace CMD;
  CommandLineArgs parser;
  parser.addParam(CommandLineArgs::Type::Int, "intParam", false);
  parser.addParam(CommandLineArgs::Type::Flag, "flag", false);
  parser.addParam(CommandLineArgs::Type::String, "str", true);
  if(parser.parse(argc, argv) != CommandLineArgs::ErrorCode::Success) {
    return 1;
  }
  const int* intParam = parser.getValue<CommandLineArgs::Type::Int>("intParam"); // If --intParam=value was not passed, getValue returns nullptr
  if(intParam) {
    std::cout<<*intParam;
  }
  const bool* flag = parser.getValue<CommandLineArgs::Type::Flag>("flag") // Flag always return non null. If passed returns ptr to true, otherwise to false
  std::cout<<*flag;
  const std::string* str = parser.getValue<CommandLineArgs::Type::String>("str") // It was added with required=true it will always have non null ptr
  std::cout<<*str;
}

CMake options

• CMD_LINE_ARGS_WITH_TESTS Builds tests for the project. Default OFF.
• CMD_LINE_ARGS_WITH_INSTALL Generate install target. Default OFF.
• CMD_LINE_ARGS_WITH_DOCS Generate doxygen documentation, generated in build/html folder. Default OFF.

Dependecies

Doctest

In case CMD_LINE_ARGS_WITH_TESTS is ON tests will be generated. The testing framework is doxygen. Everything needed will be automatically downloaded and setup using CMake FetchContent utility. Building the tests works out-of-the-box.

Documentation

In case CMD_LINE_ARGS_WITH_DOCS is ON a target which builds doxygen documentation will be generated. Sadly building doxygen on windows is a pain in the ass. Thus if this option is ON doxygen must be installed on the system. CMake uses find_package(Doxygen REQUIRED) to search for Doxygen executables.