mirror of
https://github.com/clap-rs/clap
synced 2024-12-15 15:22:30 +00:00
d840d5650e
Before #2005, `Clap` was a special trait that derived all clap traits it detected were relevant (including an enum getting both `ArgEnum`, `Clap`, and `Subcommand`). Now, we have elevated `Clap`, `Args`, `Subcommand`, and `ArgEnum` to be user facing but the name `Clap` isn't very descriptive. This also helps further clarify the relationships so a crate providing an item to be `#[clap(flatten)]` or `#[clap(subcommand)]` is more likely to choose the needed trait to derive. Also, my proposed fix fo #2785 includes making `App` attributes almost exclusively for `Clap`. Clarifying the names/roles will help communicate this. For prior discussion, see #2583
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
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// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
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// Andrew Hobden (@hoverbear) <andrew@hoverbear.org>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//
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// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
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// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
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// MIT/Apache 2.0 license.
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#![deny(warnings)]
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use clap::Parser;
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fn try_str(s: &str) -> Result<String, std::convert::Infallible> {
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Ok(s.into())
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}
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#[test]
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fn warning_never_struct() {
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#[derive(Parser, Debug, PartialEq)]
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struct Opt {
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#[clap(parse(try_from_str = try_str))]
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s: String,
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}
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assert_eq!(
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Opt {
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s: "foo".to_string()
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},
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Opt::parse_from(&["test", "foo"])
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);
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}
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#[test]
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fn warning_never_enum() {
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#[derive(Parser, Debug, PartialEq)]
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enum Opt {
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Foo {
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#[clap(parse(try_from_str = try_str))]
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s: String,
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},
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}
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assert_eq!(
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Opt::Foo {
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s: "foo".to_string()
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},
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Opt::parse_from(&["test", "foo", "foo"])
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);
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}
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