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args_from_usage()hasissueswithnonASCIIidentifiers

Non-ASCIIhelponitsownisOK:

Non-ASCII help on its own is OK:

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clap::App::new("").args_from_usage("  'with ŭnicode'");

works

If the last character is non-ascii there are slice errors:

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clap::App::new("").args_from_usage(" 'comment doesn't matter'");

If both name and help has non-ascii the program hangs:

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clap::App::new("").args_from_usage("<øh>  &#039;with ŭnicode&#039;");

If only the name is non-ascii the argument is not detected:

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clap::App::new("").args_from_usage("<øh> &#039;ASCII or empty&#039;").get_matches().value_of("øh").unwrap()

The first three act the same with options, but this is different:

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clap::App::new("").args_from_usage("--øh  &#039;ASCII&#039;").get_matches();

gives this error:

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error: Found argument &#039;--øh&#039; which wasn&#039;t expected, or isn&#039;t valid in this context

    Did you mean --ø?



USAGE:

    clapbug --ø



For more information try --help


Arg::with_name() has none of these issues.

该提问来源于开源项目:clap-rs/clap

If it was difficult to make it work. I did it anyway.


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