poafloc

Parser Of Arguments For Lines Of Commands
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commitc45774b431a3c3f91c0f6e2400265cb16395ccf1
parent4f7bad5dac5683710d20921ed4b00eee7f1137a7
authorDimitrije Dobrota <mail@dimitrijedobrota.com>
dateSat, 8 Jun 2024 16:21:58 +0200

Differentiate between optional arguments in help

Diffstat:
Margs.hpp|++++++++++++++++++++++++++----------

1 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/args.hpp b/args.hpp

@@ -74,8 +74,10 @@ class Parser {

if (opt.name) trie.insert(opt.name, opt.key);
options[key_last = opt.key] = &opt;
bool arg_opt = opt.options & Option::ARG_OPTIONAL;
if ((opt.options & ALIAS) == 0) {
help_entries.emplace_back(opt.arg, opt.message);
help_entries.emplace_back(opt.arg, opt.message, arg_opt);
if (opt.name) help_entries.back().push(opt.name);
if (std::isprint(opt.key)) {

@@ -99,7 +101,7 @@ class Parser {

std::sort(begin(help_entries), end(help_entries));
help_entries.emplace_back(nullptr, "Give this help list");
help_entries.emplace_back(nullptr, "Give this help list", false);
help_entries.back().push("help");
help_entries.back().push('?');
}

@@ -258,8 +260,8 @@ class Parser {

class help_entry_t {
public:
help_entry_t(const char *arg, const char *message)
: m_arg(arg), m_message(message) {}
help_entry_t(const char *arg, const char *message, bool opt)
: m_arg(arg), m_message(message), m_opt(opt) {}
void push(char sh) { m_opt_short.push_back(sh); }
void push(const char *lg) { m_opt_long.push_back(lg); }

@@ -269,6 +271,8 @@ class Parser {

const auto &opt_short() const { return m_opt_short; }
const auto &opt_long() const { return m_opt_long; }
const auto opt() const { return m_opt; }
bool operator<(const help_entry_t &rhs) const {
if (m_opt_long.empty() && rhs.m_opt_long.empty())
return m_opt_short.front() < rhs.m_opt_short.front();

@@ -283,14 +287,15 @@ class Parser {

}
private:
const char *m_arg = nullptr;
const char *m_message = nullptr;
std::vector<char> m_opt_short;
std::vector<const char *> m_opt_long;
const char *m_arg;
const char *m_message;
bool m_opt;
};
void help(const char *name) {
void help(const char *name) const {
std::cout << std::format("Usage: {} [OPTIONS...] {}\n\n", name,
argp->doc ? argp->doc : "");

@@ -304,7 +309,13 @@ class Parser {

else
std::cout << ", ", count += 2;
const std::string message = std::format("-{}", c);
std::string message = std::format("-{}", c);
if (entry.arg() && entry.opt_long().empty()) {
if (entry.opt())
message += std::format("[{}]", entry.arg());
else
message += std::format(" {}", entry.arg());
}
std::cout << message;
count += size(message);

@@ -318,7 +329,12 @@ class Parser {

std::cout << ", ", count += 2;
std::string message = std::format("--{}", l);
if (entry.arg()) message += std::format("[={}]", entry.arg());
if (entry.arg()) {
if (entry.opt())
message += std::format("[={}]", entry.arg());
else
message += std::format("={}", entry.arg());
}
std::cout << message;
count += size(message);