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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// 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.
//! Common API for all rust-book subcommands.
use error::CliResult;
use error::CommandResult;
use term::Term;
use help;
use build;
use serve;
use test;
pub trait Subcommand {
/// Mutate the subcommand by parsing its arguments.
///
/// Returns `Err` on a parsing error.
fn parse_args(&mut self, args: &[String]) -> CliResult<()>;
/// Print the CLI usage information.
fn usage(&self);
/// Actually execute the subcommand.
fn execute(&mut self, term: &mut Term) -> CommandResult<()>;
}
/// Create a Subcommand object based on its name.
pub fn parse_name(name: &str) -> Option<Box<Subcommand>> {
for parser in [
help::parse_cmd as fn(&str) -> Option<Box<Subcommand>>,
build::parse_cmd as fn(&str) -> Option<Box<Subcommand>>,
serve::parse_cmd as fn(&str) -> Option<Box<Subcommand>>,
test::parse_cmd as fn(&str) -> Option<Box<Subcommand>>].iter() {
let parsed = (*parser)(name);
if parsed.is_some() { return parsed }
}
None
}
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