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uucore: allow 'wrong number of arguments' macro to be more precise

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This commit is contained in:
Nathan Ross 2016-08-14 22:49:27 -04:00
parent 268b691881
commit ee3aaa017f
1 changed files with 15 additions and 2 deletions
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17
src/uucore/macros.rs
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@ -327,8 +327,21 @@ macro_rules! msg_args_nonexistent_file { ($received:expr) => (
msg_args_invalid_value!("paths to files", snippet_no_file_at_path!($received)));}
#[macro_export]
macro_rules! msg_wrong_number_of_arguments { () => (
msg_args_invalid_value!("wrong number of arguments") ); }
macro_rules! msg_wrong_number_of_arguments {
() => (
msg_args_invalid_value!("wrong number of arguments")
);
($min:expr, $max:expr) => (
msg_args_invalid_value!(format!("expects {}-{} arguments", $min, $max))
);
($exact:expr) => (
if $exact == 1 {
msg_args_invalid_value!("expects 1 argument")
} else {
msg_args_invalid_value!(format!("expects {} arguments", $exact))
}
);
}
// -- message templates : invalid input : input combinations