betterflag

It's a flag (golang package) implementation in C++, only useful methods has been implemented

Impl

The main implementation is distributed inside a C++ header file, making everything more portable

Usage example

BetterFlag::Flag flag(argc, const_cast<const char**>(argv));

unsigned int xValue{};
char *userName;

flag.UIntVar(&xValue, "xValue", 100, "Define X value, default is 100");
flag.StringVar(&userName, "username", "Gabriel Correia", "Setups user name");
flag.Parse();
    
fmt::print("X value: {}\n", xValue);
fmt::print("Username: {}\n", userName);

Some properties are inherited from Golang implementation

Supported methods

• void PrintDefaults() const;
• auto NFlag() const;
• void Set(const char *flagName, const char *flagValue);
• void Visit(VisitCallback visitCallback);
• std::optional<const std::shared_ptr> Lookup(const char *flagName);
• auto Arg(int index) const;
• void VisitAll(VisitCallback visitCallback);
• auto Output() const;
• void SetOutput(FILE *outPrint);
• void Parse();
• void UIntVar(unsigned int* intPtr, const char* flagName, unsigned int defaultValue, const char* flagDesc);
• void IntVar(int* intPtr, const char* flagName, int defaultValue, const char* flagDesc);
• StringVar(char** stringPtr, const char* flagName, const char* defaultValue, const char* flagDesc);
• bool Passed();
• std::vector<const char*> Args();
• void DefineFlagValue(const std::shared_ptr& flagAva, const char* flagArg);
• Float64(double* intPtr, const char* flagName, double defaultValue, const char* flagDesc);

Supported values

• FLAG_INTEGER (int)
• FLAG_UNSIGNED_INTEGER (unsigned int)
• FLAG_STRING (const char*)
• FLAG_FLOAT_64 (double)