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Virtual options list, overridable help flag.

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This commit is contained in:
henryiii 2017-02-06 23:20:15 -05:00
parent f6b1bc1357
commit 6ed2899741
1 changed files with 11 additions and 6 deletions
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17
include/CLI/App.hpp
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@ -36,12 +36,13 @@ protected:
std::string name; std::string name;
std::string prog_description; std::string prog_description;
std::vector<Option> options; std::vector<Option> options;
Option* help_flag {nullptr};
std::vector<std::string> missing_options; std::vector<std::string> missing_options;
std::deque<std::string> positionals; std::deque<std::string> positionals;
std::vector<std::unique_ptr<App>> subcommands; std::vector<std::unique_ptr<App>> subcommands;
bool parsed{false}; bool parsed{false};
App* subcommand = nullptr; App* subcommand{nullptr};
std::string progname = "program"; std::string progname{"program"};
std::function<void()> app_callback; std::function<void()> app_callback;
@ -51,9 +52,8 @@ public:
/// it is not possible to overload on std::function (fixed in c++14 /// it is not possible to overload on std::function (fixed in c++14
/// and backported to c++11 on newer compilers). Use capture by reference /// and backported to c++11 on newer compilers). Use capture by reference
/// to get a pointer to App if needed. /// to get a pointer to App if needed.
App* set_callback(std::function<void()> callback) { void set_callback(std::function<void()> callback) {
app_callback = callback; app_callback = callback;
return this;
} }
void run_callback() { void run_callback() {
@ -79,10 +79,15 @@ public:
App(std::string prog_description="") App(std::string prog_description="")
: prog_description(prog_description) { : prog_description(prog_description) {
add_flag("-h,--help", "Print this help message and exit"); setup();
} }
/// Setup help flag. Virtual to allow customization.
virtual void setup() {
help_flag = add_flag("-h,--help", "Print this help message and exit");
}
App* add_subcommand(std::string name, std::string description="") { App* add_subcommand(std::string name, std::string description="") {
subcommands.emplace_back(new App(description)); subcommands.emplace_back(new App(description));
subcommands.back()->name = name; subcommands.back()->name = name;
@ -317,7 +322,7 @@ public:
} }
} }
if (count("--help") > 0) { if (help_flag != nullptr && help_flag->count() > 0) {
throw CallForHelp(); throw CallForHelp();
} }