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Const-correct ArgumentParser

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This commit is contained in:
Rafal Bedzkowski 2021-08-02 17:21:46 +02:00
parent e1ea7ec50a
commit 4ede429264
2 changed files with 24 additions and 1 deletions
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2
include/argparse/argparse.hpp
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@ -925,7 +925,7 @@ public:
* @throws std::bad_any_cast if the option is not of type T
*/
template <typename T = std::string>
auto present(std::string_view aArgumentName) -> std::optional<T> {
auto present(std::string_view aArgumentName) const -> std::optional<T> {
return (*this)[aArgumentName].present<T>();
}

23
test/test_value_semantics.cpp
View File

@ -93,4 +93,27 @@ TEST_CASE("ArgumentParser is CopyConstructible and CopyAssignable" *
}
}
}
TEST_CASE("ArgumentParser is const-correct after construction and parsing" *
test_suite("value_semantics")) {
GIVEN("a parser") {
argparse::ArgumentParser parser("test");
parser.add_argument("--foo", "-f").help("I am foo");
parser.add_description("A description");
parser.add_epilog("An epilog");
WHEN("becomes const-qualified") {
parser.parse_args({"./main", "--foo", "baz"});
const auto const_parser = std::move(parser);
THEN("only const methods are accessible") {
REQUIRE(const_parser.help().str().size() > 0);
REQUIRE(const_parser.present<std::string>("--foo"));
REQUIRE(const_parser.is_used("-f"));
REQUIRE(const_parser.get("-f") == "baz");
REQUIRE(const_parser["-f"] == std::string("baz"));
}
}
}
}
}