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derive arg_group from arg_description_container

master
Daniel Kolesa 2017-05-25 19:25:06 +02:00
parent 8391b03b37
commit 01679ed9be
1 changed files with 83 additions and 129 deletions
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212
ostd/argparse.hh
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@ -375,91 +375,6 @@ private:
bool p_required;
};
struct arg_group: arg_description {
friend struct arg_description_container;
arg_type type() const {
return arg_type::GROUP;
}
string_range get_name() const {
return p_name;
}
template<typename ...A>
arg_optional &add_optional(A &&...args) {
arg_description *p = new arg_optional(std::forward<A>(args)...);
return static_cast<arg_optional &>(*p_opts.emplace_back(p));
}
template<typename ...A>
arg_positional &add_positional(A &&...args) {
arg_description *p = new arg_positional(std::forward<A>(args)...);
return static_cast<arg_positional &>(*p_opts.emplace_back(p));
}
template<typename ...A>
arg_mutually_exclusive_group &add_mutually_exclusive_group(A &&...args) {
arg_description *p = new arg_mutually_exclusive_group(
std::forward<A>(args)...
);
return static_cast<arg_mutually_exclusive_group &>(
*p_opts.emplace_back(p)
);
}
template<typename F>
bool for_each(F &&func, bool iter_ex) const {
return for_each_impl(func, iter_ex);
}
protected:
arg_group() = delete;
arg_group(string_range name):
p_name(name)
{}
arg_description *find_arg(
string_range name, std::optional<arg_type> tp, bool parsing
) {
for (auto &opt: p_opts) {
if (auto *p = opt->find_arg(name, tp, parsing); p) {
return p;
}
}
return nullptr;
}
private:
template<typename F>
bool for_each_impl(F &func, bool iter_ex) const {
for (auto &desc: p_opts) {
switch (desc->type()) {
case arg_type::OPTIONAL:
case arg_type::POSITIONAL:
if (!func(*desc)) {
return false;
}
break;
case arg_type::MUTUALLY_EXCLUSIVE_GROUP:
if (!static_cast<arg_mutually_exclusive_group const &>(
*desc
).for_each(func, iter_ex)) {
return false;
}
break;
default:
/* should never happen */
throw arg_error{"invalid argument type"};
}
}
return true;
}
std::string p_name;
std::vector<std::unique_ptr<arg_description>> p_opts;
};
struct arg_description_container {
template<typename ...A>
arg_optional &add_optional(A &&...args) {
@ -473,12 +388,6 @@ struct arg_description_container {
return static_cast<arg_positional &>(*p_opts.emplace_back(p));
}
template<typename ...A>
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));
}
template<typename ...A>
arg_mutually_exclusive_group &add_mutually_exclusive_group(A &&...args) {
arg_description *p = new arg_mutually_exclusive_group(
@ -519,48 +428,87 @@ protected:
}
template<typename F>
bool for_each_impl(F &func, bool iter_ex) const {
for (auto &desc: p_opts) {
switch (desc->type()) {
case arg_type::OPTIONAL:
case arg_type::POSITIONAL:
if (!func(static_cast<arg_description const &>(*desc))) {
return false;
}
break;
case arg_type::GROUP:
if (!static_cast<arg_group const &>(*desc).for_each(
func, iter_ex
)) {
return false;
}
break;
case arg_type::MUTUALLY_EXCLUSIVE_GROUP:
if (!iter_ex) {
if (!func(static_cast<arg_description const &>(
*desc
))) {
return false;
}
continue;
}
if (!static_cast<arg_mutually_exclusive_group const &>(
*desc
).for_each(func, iter_ex)) {
return false;
}
break;
default:
/* should never happen */
throw arg_error{"invalid argument type"};
}
}
return true;
}
bool for_each_impl(F &func, bool iter_ex) const;
std::vector<std::unique_ptr<arg_description>> p_opts;
};
struct arg_group: arg_description, arg_description_container {
template<typename HelpFormatter>
friend struct basic_arg_parser;
arg_type type() const {
return arg_type::GROUP;
}
string_range get_name() const {
return p_name;
}
protected:
arg_group() = delete;
arg_group(string_range name):
arg_description(), arg_description_container(), p_name(name)
{}
arg_description *find_arg(
string_range name, std::optional<arg_type> tp, bool parsing
) {
for (auto &opt: p_opts) {
if (auto *p = opt->find_arg(name, tp, parsing); p) {
return p;
}
}
return nullptr;
}
private:
std::string p_name;
std::vector<std::unique_ptr<arg_description>> p_opts;
};
template<typename F>
inline bool arg_description_container::for_each_impl(
F &func, bool iter_ex
) const {
for (auto &desc: p_opts) {
switch (desc->type()) {
case arg_type::OPTIONAL:
case arg_type::POSITIONAL:
if (!func(static_cast<arg_description const &>(*desc))) {
return false;
}
break;
case arg_type::GROUP:
if (!static_cast<arg_group const &>(*desc).for_each(
func, iter_ex
)) {
return false;
}
break;
case arg_type::MUTUALLY_EXCLUSIVE_GROUP:
if (!iter_ex) {
if (!func(static_cast<arg_description const &>(
*desc
))) {
return false;
}
continue;
}
if (!static_cast<arg_mutually_exclusive_group const &>(
*desc
).for_each(func, iter_ex)) {
return false;
}
break;
default:
/* should never happen */
throw arg_error{"invalid argument type"};
}
}
return true;
}
template<typename HelpFormatter>
struct basic_arg_parser: arg_description_container {
private:
@ -573,6 +521,12 @@ public:
arg_description_container(), p_progname(progname), p_posix(posix)
{}
template<typename ...A>
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));
}
void parse(int argc, char **argv) {
if (p_progname.empty()) {
p_progname = argv[0];