#![feature(crate_visibility_modifier)]
#![feature(in_band_lifetimes)]
#![feature(async_await)]
#![feature(try_trait)]
#![feature(bind_by_move_pattern_guards)]
use clap:: {App, Arg};
use log:: LevelFilter;
use std::error:: Error;
fn main() -> Result<(), Box<dyn Error>> {
let matches = App::new("nushell")
.version("0.1.3")
.arg(
Arg::with_name("loglevel")
)
.arg(
.short("l")
.long("loglevel")
.value_name("LEVEL")
.possible_values(&["error", "warn", "info", "debug", "trace"])
.takes_value(true),
Arg::with_name("develop")
.long("develop")
.multiple(true)
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Explanation
The image contains rust source code. The source code uses 'clap' library to handle command line arguments and 'log' crate for logging purposes. It defines a main function that returns a Result type, indicating potential error handling. The code defines arguments for log level and develop mode.