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Merge branch 'master' of https://github.com/p-ranav/argparse

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Pranav Srinivas Kumar 2019-03-31 13:01:21 -04:00
commit 307181159e
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README.md
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@ -22,6 +22,25 @@ std::string input = program.get("input"); // "rocket.msh"
std::string output = program.get("output"); // "thrust_profile.csv"
```
### Construct Objects from Arguments with ```.action```
```cpp
argparse::ArgumentParser program("json_test");
program.add_argument("config")
.action([](const std::string& value) {
// read a JSON file
std::ifstream stream(value);
nlohmann::json config_json;
stream >> config_json;
return config_json;
});
program.parse_args({"./test", "config.json"});
nlohmann::json config = program.get<nlohmann::json>("config");
```
### Optional Arguments
```cpp
@ -126,22 +145,3 @@ auto b = program.get<bool>("-b"); // true
auto c = program.get<std::vector<float>>("-c"); // {3.14f, 2.718f}
auto files = program.get<std::vector<std::string>>("--files"); // {"a.txt", "b.txt", "c.txt"}
```
### Construct class objects from arguments
```cpp
argparse::ArgumentParser program("json_test");
program.add_argument("config")
.action([](const std::string& value) {
// read a JSON file
std::ifstream stream(value);
nlohmann::json config_json;
stream >> config_json;
return config_json;
});
program.parse_args({"./test", "config.json"});
nlohmann::json config = program.get<nlohmann::json>("config");
```