mirror of
https://github.com/clap-rs/clap
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79 lines
2.7 KiB
Rust
79 lines
2.7 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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#![doc(html_logo_url = "https://clap.rs/images/media/clap.png")]
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#![doc(html_root_url = "https://docs.rs/clap_derive/3.0.0-beta.4")]
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//! This crate is custom derive for clap. It should not be used
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//! directly. See [clap documentation](http://docs.rs/clap)
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//! for the usage of `#[derive(Parser)]`.
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#![forbid(unsafe_code)]
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extern crate proc_macro;
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use proc_macro::TokenStream;
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use proc_macro_error::proc_macro_error;
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use syn::{parse_macro_input, DeriveInput};
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mod attrs;
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mod derives;
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mod dummies;
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mod parse;
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mod utils;
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/// Generates the `ArgEnum` impl.
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#[proc_macro_derive(ArgEnum, attributes(clap))]
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#[proc_macro_error]
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pub fn arg_enum(input: TokenStream) -> TokenStream {
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let input: DeriveInput = parse_macro_input!(input);
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derives::derive_arg_enum(&input).into()
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}
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/// Generates the `Parser` implementation.
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///
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/// This is far less verbose than defining the `clap::App` struct manually,
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/// receiving an instance of `clap::ArgMatches` from conducting parsing, and then
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/// implementing a conversion code to instantiate an instance of the user
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/// context struct.
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#[proc_macro_derive(Parser, attributes(clap))]
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#[proc_macro_error]
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pub fn parser(input: TokenStream) -> TokenStream {
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let input: DeriveInput = parse_macro_input!(input);
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derives::derive_parser(&input).into()
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}
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/// Generates the `IntoApp` impl.
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#[proc_macro_derive(IntoApp, attributes(clap))]
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#[proc_macro_error]
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pub fn into_app(input: TokenStream) -> TokenStream {
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let input: DeriveInput = parse_macro_input!(input);
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derives::derive_into_app(&input).into()
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}
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/// Generates the `Subcommand` impl.
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#[proc_macro_derive(Subcommand, attributes(clap))]
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#[proc_macro_error]
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pub fn subcommand(input: TokenStream) -> TokenStream {
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let input: DeriveInput = parse_macro_input!(input);
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derives::derive_subcommand(&input).into()
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}
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/// Generates the `Args` impl.
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#[proc_macro_derive(Args, attributes(clap))]
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#[proc_macro_error]
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pub fn args(input: TokenStream) -> TokenStream {
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let input: DeriveInput = parse_macro_input!(input);
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derives::derive_args(&input).into()
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}
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