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initial support for optional argument groups

master
Daniel Kolesa 2017-05-21 15:52:53 +02:00
parent 42edcf1e94
commit bf72ba0542
1 changed files with 25 additions and 10 deletions
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35
ostd/argparse.hh
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@ -44,7 +44,7 @@ struct arg_error: std::runtime_error {
enum class arg_type {
OPTIONAL = 0,
POSITIONAL,
CATEGORY
GROUP
};
enum class arg_value {
@ -115,6 +115,7 @@ struct arg_optional: arg_argument {
template<typename HelpFormatter>
friend struct basic_arg_parser;
friend struct arg_description_container;
friend struct arg_group;
arg_type type() const {
return arg_type::OPTIONAL;
@ -287,23 +288,37 @@ private:
bool p_used = false;
};
struct arg_category: arg_description {
struct arg_group: arg_description {
friend struct arg_description_container;
arg_type type() const {
return arg_type::CATEGORY;
return arg_type::GROUP;
}
template<typename ...A>
arg_optional &add_optional(A &&...args) {
arg_optional *o = new arg_optional(std::forward<A>(args)...);
return *p_opts.emplace_back(o);
}
protected:
arg_category() = delete;
arg_category(
string_range name
):
arg_group() = delete;
arg_group(string_range name):
p_name(name)
{}
arg_description *find_arg(string_range name, std::optional<arg_type> tp) {
for (auto &opt: p_opts) {
if (auto *p = opt->find_arg(name, tp); p) {
return p;
}
}
return nullptr;
}
private:
std::string p_name;
std::vector<std::unique_ptr<arg_optional>> p_opts;
};
struct arg_description_container {
@ -320,9 +335,9 @@ struct arg_description_container {
}
template<typename ...A>
arg_category &add_category(A &&...args) {
arg_description *p = new arg_category(std::forward<A>(args)...);
return static_cast<arg_category &>(*p_opts.emplace_back(p));
arg_group &add_group(A &&...args) {
arg_description *p = new arg_group(std::forward<A>(args)...);
return static_cast<arg_group &>(*p_opts.emplace_back(p));
}
auto iter() const {