This requires enabling the [derive
feature flag][crate::_features].
Help:
$ typed-derive --help Usage: typed-derive[EXE] [OPTIONS] Options: -O <OPTIMIZATION> Implicitly using `std::str::FromStr` -I <DIR> Allow invalid UTF-8 paths --bind <BIND> Handle IP addresses --sleep <SLEEP> Allow human-readable durations -D <DEFINES> Hand-written parser for tuples --port <PORT> Support for discrete numbers [default: 22] [possible values: 22, 80] --log-level <LOG_LEVEL> Support enums from a foreign crate that don't implement `ValueEnum` [default: info] [possible values: trace, debug, info, warn, error] -h, --help Print help
Optimization-level (number)
$ typed-derive -O 1 Args { optimization: Some(1), include: None, bind: None, sleep: None, defines: [], port: 22, log_level: Info } $ typed-derive -O plaid ? failed error: invalid value 'plaid' for '-O <OPTIMIZATION>': invalid digit found in string For more information, try '--help'.
Include (path)
$ typed-derive -I../hello Args { optimization: None, include: Some("../hello"), bind: None, sleep: None, defines: [], port: 22, log_level: Info }
IP Address
$ typed-derive --bind 192.0.0.1 Args { optimization: None, include: None, bind: Some(192.0.0.1), sleep: None, defines: [], port: 22, log_level: Info } $ typed-derive --bind localhost ? failed error: invalid value 'localhost' for '--bind <BIND>': invalid IP address syntax For more information, try '--help'.
Time
$ typed-derive --sleep 10s Args { optimization: None, include: None, bind: None, sleep: Some(Duration(10s)), defines: [], port: 22, log_level: Info } $ typed-derive --sleep forever ? failed error: invalid value 'forever' for '--sleep <SLEEP>': expected number at 0 For more information, try '--help'.
Defines (key-value pairs)
$ typed-derive -D Foo=10 -D Alice=30 Args { optimization: None, include: None, bind: None, sleep: None, defines: [("Foo", 10), ("Alice", 30)], port: 22, log_level: Info } $ typed-derive -D Foo ? failed error: invalid value 'Foo' for '-D <DEFINES>': invalid KEY=value: no `=` found in `Foo` For more information, try '--help'. $ typed-derive -D Foo=Bar ? failed error: invalid value 'Foo=Bar' for '-D <DEFINES>': invalid digit found in string For more information, try '--help'.
Discrete numbers
$ typed-derive --port 22 Args { optimization: None, include: None, bind: None, sleep: None, defines: [], port: 22, log_level: Info } $ typed-derive --port 80 Args { optimization: None, include: None, bind: None, sleep: None, defines: [], port: 80, log_level: Info } $ typed-derive --port ? failed error: a value is required for '--port <PORT>' but none was supplied [possible values: 22, 80] For more information, try '--help'. $ typed-derive --port 3000 ? failed error: invalid value '3000' for '--port <PORT>' [possible values: 22, 80] For more information, try '--help'.
Enums from crates that can't implement ValueEnum
$ typed-derive --log-level debug Args { optimization: None, include: None, bind: None, sleep: None, defines: [], port: 22, log_level: Debug } $ typed-derive --log-level error Args { optimization: None, include: None, bind: None, sleep: None, defines: [], port: 22, log_level: Error } $ typed-derive --log-level ? failed error: a value is required for '--log-level <LOG_LEVEL>' but none was supplied [possible values: trace, debug, info, warn, error] For more information, try '--help'. $ typed-derive --log-level critical ? failed error: invalid value 'critical' for '--log-level <LOG_LEVEL>' [possible values: trace, debug, info, warn, error] For more information, try '--help'.