theany/argument-parser
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feat(parser): implement on-complete callback functionality

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Add on_complete event handler to trigger actions after argument parsing completes
Move grep logic to separate function and register it as a completion callback
Update argument getters and help text generation to be const methods
This commit is contained in:
Abdüssamet ERSOYLU
2025-10-06 11:17:14 +04:00
parent 5f65eca713
commit cad569de25
3 changed files with 45 additions and 27 deletions
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40
src/main.cpp
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@@ -1,3 +1,4 @@
#include "argument_parser.hpp"
#include <argparse>
#include <cstdlib>
#include <iostream>
@@ -94,7 +95,7 @@ const auto cat = argument_parser::helpers::make_parametered_action<std::string>(
file.close();
});
auto grep(argument_parser::base_parser& parser, std::string const& filename, std::regex const& pattern) {
auto grep(argument_parser::base_parser const& parser, std::string const& filename, std::regex const& pattern) {
if (filename.empty()) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
@@ -115,6 +116,23 @@ auto grep(argument_parser::base_parser& parser, std::string const& filename, std
file.close();
}
void run_grep(argument_parser::base_parser const& parser) {
auto filename = parser.get_optional<std::string>("file");
auto pattern = parser.get_optional<std::regex>("grep");
if (filename && pattern) {
grep(parser, filename.value(), pattern.value());
} else if (filename) {
std::cerr << "Missing grep pattern" << std::endl;
parser.display_help(conventions);
exit(-1);
} else if (pattern) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
}
int main() {
auto parser = argument_parser::parser{};
@@ -131,23 +149,9 @@ int main() {
parser.add_argument<std::vector<int>>("t", "test", "Test vector<int>", false);
parser.add_argument<std::vector<std::string>>("ts", "test-strings", "Test vector<string>", false);
parser.on_complete(::run_grep);
parser.handle_arguments(conventions);
auto filename = parser.get_optional<std::string>("file");
auto pattern = parser.get_optional<std::regex>("grep");
if (filename && pattern) {
grep(parser, filename.value(), pattern.value());
} else if (filename) {
std::cerr << "Missing grep pattern" << std::endl;
parser.display_help(conventions);
exit(-1);
} else if (pattern) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
auto test = parser.get_optional<std::vector<int>>("test");
if (test) {
for (auto const& item : test.value()) {
@@ -162,7 +166,5 @@ int main() {
}
}
return 0;
}