V3 master #510
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V3 master #510
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Example:
```
#[macro_use]
extern crate clap;
use clap::{App, SubCommand};
// Note lowercase variants, the subcommand will be exactly as typed here
subcommands!{
enum MyProg {
show,
delete,
make
}
}
// Alternatively, if you wish to have variants which display
// differently, or contain hyphens ("-") one can use this variation of
// the macro
subcommands!{
enum MyProgAlt {
Show => "show",
Delete => "delete",
DoStuff => "do-stuff"
}
}
fn main() {
let m = App::new("myprog")
.subcommand(SubCommand::with_name(MyProg::show))
.subcommand(SubCommand::with_name(MyProg::delete))
.subcommand(SubCommand::with_name(MyProg::make))
.get_matches_from(vec!["myprog", "show"]);
match m.subcommand() {
Some((MyProg::show, _)) => println!("'myprog show' was used"),
Some((MyProg::delete, _)) => println!("'myprog delete' was used"),
Some((MyProg::make, _)) => println!("'myprog make' was used"),
None => println!("No subcommand was used"),
}
}
```
This has the benefit of giving non-exhaustive compile time errors when you add subcommands but
forget to check or handle them later.
The v3 macros can now be used with multiple enums:
```rust
args! {
enum SubCmd1Args {
One,
Two,
Three
}
enum SubCmd2Args {
Four,
Five,
Six
}
}
```
The v3 macros can now be used with multiple enums:
```rust
args! {
enum SubCmd1Args {
One,
Two,
Three
}
enum SubCmd2Args {
Four,
Five,
Six
}
}
```
The args! macro now has the same alternate form as the subcommands! macro.
```rust
args! {
enum ProgArgs {
Arg1 => "FILE",
Arg2 => "Other"
}
}
```
|
r? @sru (yo-bot has picked a reviewer for you, use r? to override) |
|
☔ The latest upstream changes (presumably #517) made this pull request unmergeable. Please resolve the merge conflicts. |
|
A lot has changed, I'll reopen this when the time gets closer |
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Still a Work in Progress but getting closer and closer. It's now PR'able minus things like deprecation notices and updated readme/changelogs.
Before this is merged, current
masterwill be branched off to becomev2-master.Here's a list of things I still need to do
subcommands!macro for using enums with subcommandsArgs::subcommandArgs::subcommand_nameArgs::subcommand_matchesargs!macro for using enums with argsexamples/with new subcommand args macrosarg!subcommands!_->-conversion