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feat(macros): add ability to get a typed multiple values

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This commit is contained in:
Kevin K 2015-04-14 13:56:53 -04:00
parent 4b7cd3ea49
commit e243fe38dd
1 changed files with 24 additions and 2 deletions
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26
src/macros.rs
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@ -40,7 +40,29 @@ macro_rules! value_t {
Err(_) => Err(format!("{} isn't a valid {}",v,stringify!($t))), Err(_) => Err(format!("{} isn't a valid {}",v,stringify!($t))),
} }
}, },
None => Err(format!("Argument not found")) None => Err(format!("Argument \"{}\" not found", $v))
}
};
($m:ident.values_of($v:expr), $t:ty) => {
match $m.values_of($v) {
Some(ref v) => {
let mut tmp = Vec::with_capacity(v.len());
let mut err = None;
for pv in v {
match pv.parse::<$t>() {
Ok(rv) => tmp.push(rv),
Err(_) => {
err = Some(format!("{} isn't a valid {}",pv,stringify!($t)));
break
}
}
}
match err {
Some(e) => Err(e),
None => Ok(tmp)
}
},
None => Err(format!("Argument \"{}\" not found", $v))
} }
}; };
} }
@ -60,7 +82,7 @@ macro_rules! value_t_or_exit {
} }
}, },
None => { None => {
println!("Argument not found\n{}\nPlease re-run with --help for more information", $m.usage()); println!("Argument \"{}\" not found or is not valid\n{}\nPlease re-run with --help for more information",$v, $m.usage());
::std::process::exit(1); ::std::process::exit(1);
} }
} }