When calling choices("foo") it appears the array overload is preferred, leading to the value not being accepted.
auto choice = std::string{};
cli.add_argument(
lyra::opt(choice, "your choice")
.name("--choice")
.choices("foo") // does not work
//.choices(std::string{"foo"}) // does work
.required());
When called with ./a.out --choice foo it causes the error Unable to convert 'foo' to destination type
When calling
choices("foo")it appears the array overload is preferred, leading to the value not being accepted.When called with
./a.out --choice fooit causes the errorUnable to convert 'foo' to destination typeDemonstration: https://godbolt.org/z/YWvY3a96x