clap/tests/derive/macros.rs

// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
// Ana Hobden (@hoverbear) <operator@hoverbear.org>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//
// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
// MIT/Apache 2.0 license.

use clap::Parser;

// Tests that clap_derive properly detects an `Option` field
// that results from a macro expansion
#[test]
fn use_option() {
    macro_rules! expand_ty {
        ($name:ident: $ty:ty) => {
            #[derive(Parser)]
            struct Outer {
                #[arg(short, long)]
                #[allow(dead_code)]
                $name: $ty,
            }
        };
    }

    expand_ty!(my_field: Option<String>);
}

#[test]
fn issue_447() {
    macro_rules! Command {
        ( $name:ident, [
        #[$meta:meta] $var:ident($inner:ty)
      ] ) => {
            #[derive(Debug, PartialEq, clap::Parser)]
            enum $name {
                #[$meta]
                $var($inner),
            }
        };
    }

    Command! {GitCmd, [
      #[command(external_subcommand)]
      Ext(Vec<String>)
    ]}
}