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feat: add reference capabilities to positional arguments. use existing

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v2 api to capture reference arguments.
This commit is contained in:
killua.z
2026-05-05 11:57:36 +04:00
parent 96fdbb5f00
commit 54415f9527
2 changed files with 28 additions and 8 deletions
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6
src/headers/parser/argument_builder.hpp
View File

@@ -368,12 +368,8 @@ private:
throw std::logic_error("reference() was selected without a target."); throw std::logic_error("reference() was selected without a target.");
} }
pairs[argument_parser::v2::flags::Reference] = target;
parser.template add_argument<store_type>(pairs); parser.template add_argument<store_type>(pairs);
parser.on_complete([target, key](argument_parser::base_parser const& completed_parser) {
if (auto value = completed_parser.template get_optional<store_type>(key)) {
*target = value.value();
}
});
} }
auto build_parametered_action(argument_parser::v2::base_parser& parser) const -> void { auto build_parametered_action(argument_parser::v2::base_parser& parser) const -> void {

30
src/headers/parser/parser_v2.hpp
View File

@@ -154,9 +154,13 @@ namespace argument_parser::v2 {
found_params[extended_add_argument_flags::Action] = true; found_params[extended_add_argument_flags::Action] = true;
if constexpr (!std::is_same_v<T, void>) { if constexpr (!std::is_same_v<T, void>) {
auto ref = get_or_throw<T*>(argument_pairs.at(add_argument_flags::Reference), "reference"); auto ref = get_or_throw<T*>(argument_pairs.at(add_argument_flags::Reference), "reference");
action = helpers::make_parametered_action<T>([ref](T const& t) { if (action) {
*ref = t; throw std::logic_error("Cannot use both action and reference for the same argument");
}).clone(); } else {
action = helpers::make_parametered_action<T>([ref](T const& t) {
*ref = t;
}).clone();
}
} else { } else {
throw std::logic_error("Reference argument must not be void"); throw std::logic_error("Reference argument must not be void");
} }
@@ -255,6 +259,26 @@ namespace argument_parser::v2 {
position = get_or_throw<int>(argument_pairs.at(add_argument_flags::Position), "position"); position = get_or_throw<int>(argument_pairs.at(add_argument_flags::Position), "position");
} }
if (argument_pairs.find(add_argument_flags::Reference) != argument_pairs.end()) {
if (!IsTyped) {
throw std::logic_error("Reference argument must be typed");
}
if constexpr (!std::is_same_v<T, void>) {
auto ref = get_or_throw<T*>(argument_pairs.at(add_argument_flags::Reference), "reference");
if (action) {
throw std::logic_error("Cannot use both action and reference for the same argument");
} else {
action = helpers::make_parametered_action<T>([ref](T const& t) {
*ref = t;
}).clone();
}
} else {
throw std::logic_error("Reference argument must not be void");
}
}
if (help_text.empty()) { if (help_text.empty()) {
if constexpr (IsTyped) { if constexpr (IsTyped) {
if constexpr (internal::sfinae::has_format_hint<parsing_traits::parser_trait<T>>::value && if constexpr (internal::sfinae::has_format_hint<parsing_traits::parser_trait<T>>::value &&