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add option to use posixly correct argument ordering

master
Daniel Kolesa 2017-05-20 01:37:22 +02:00
parent bff30e3eb2
commit a84c1e5d84
1 changed files with 17 additions and 8 deletions
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25
ostd/argparse.hh
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@ -332,8 +332,10 @@ protected:
template<typename HelpFormatter>
struct basic_arg_parser: arg_description_container {
basic_arg_parser(string_range progname = string_range{}):
arg_description_container(), p_progname(progname)
basic_arg_parser(
string_range progname = string_range{}, bool posix = false
):
arg_description_container(), p_progname(progname), p_posix(posix)
{}
void parse(int argc, char **argv) {
@ -346,7 +348,6 @@ struct basic_arg_parser: arg_description_container {
template<typename InputRange>
void parse(InputRange args) {
bool allow_optional = true;
while (!args.empty()) {
string_range s{args.front()};
if (s == "--") {
@ -354,14 +355,13 @@ struct basic_arg_parser: arg_description_container {
allow_optional = false;
continue;
}
if (!allow_optional) {
parse_pos(s);
continue;
}
if (is_optarg(s)) {
if (allow_optional && is_optarg(s)) {
parse_opt(s, args);
continue;
}
if (p_posix) {
allow_optional = false;
}
parse_pos(s);
}
}
@ -405,6 +405,14 @@ struct basic_arg_parser: arg_description_container {
return p_progname;
}
bool posix_ordering() const {
return p_posix;
}
bool posix_ordering(bool v) {
return std::exchange(p_posix, v);
}
private:
static bool is_optarg(string_range arg) {
return (!arg.empty() && (arg[0] == '-') && (arg != "-"));
@ -470,6 +478,7 @@ private:
std::string p_progname;
HelpFormatter p_helpfmt{*this};
bool p_posix = false;
};
struct default_help_formatter {