mirror of
https://github.com/clap-rs/clap
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60 lines
1.3 KiB
Markdown
60 lines
1.3 KiB
Markdown
**This requires enabling the [`derive` feature flag][crate::_features].**
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You can use `--` to escape further arguments.
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Let's see what this looks like in the help:
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```console
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$ escaped-positional-derive --help
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A simple to use, efficient, and full-featured Command Line Argument Parser
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Usage: escaped-positional-derive[EXE] [OPTIONS] [-- <SLOP>...]
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Arguments:
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[SLOP]...
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Options:
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-f
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-p <PEAR>
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-h, --help Print help information
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-V, --version Print version information
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```
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Here is a baseline without any arguments:
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```console
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$ escaped-positional-derive
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-f used: false
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-p's value: None
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'slops' values: []
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```
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Notice that we can't pass positional arguments before `--`:
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```console
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$ escaped-positional-derive foo bar
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? failed
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error: Found argument 'foo' which wasn't expected, or isn't valid in this context
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Usage: escaped-positional-derive[EXE] [OPTIONS] [-- <SLOP>...]
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For more information try '--help'
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```
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But you can after:
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```console
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$ escaped-positional-derive -f -p=bob -- sloppy slop slop
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-f used: true
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-p's value: Some("bob")
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'slops' values: ["sloppy", "slop", "slop"]
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```
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As mentioned, the parser will directly pass everything through:
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```console
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$ escaped-positional-derive -- -f -p=bob sloppy slop slop
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-f used: false
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-p's value: None
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'slops' values: ["-f", "-p=bob", "sloppy", "slop", "slop"]
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```
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