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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! Servo's compiler plugin/macro crate
//!
//! Attributes this crate provides:
//!
//! - `#[derive(DenyPublicFields)]` : Forces all fields in a struct/enum to be private
//! - `#[derive(JSTraceable)]` : Auto-derives an implementation of `JSTraceable` for a struct in the script crate
//! - `#[must_root]` : Prevents data of the marked type from being used on the stack.
//! See the lints module for more details
//! - `#[dom_struct]` : Implies #[derive(JSTraceable, DenyPublicFields)]`, and `#[must_root]`.
//! Use this for structs that correspond to a DOM type
#![deny(unsafe_code)]
#![feature(plugin)]
#![feature(plugin_registrar)]
#![feature(rustc_private)]
#[cfg(feature = "unrooted_must_root_lint")]
#[macro_use]
extern crate rustc;
// Work around TLS failure: https://github.com/rust-lang/rust/issues/62717#issuecomment-511876555
#[allow(unused)]
extern crate rustc_driver;
extern crate rustc_plugin;
extern crate syntax;
extern crate weedle;
use rustc_plugin::Registry;
use syntax::feature_gate::AttributeType::Whitelisted;
use syntax::symbol::Symbol;
#[cfg(feature = "unrooted_must_root_lint")]
mod unrooted_must_root;
#[cfg(feature = "webidl_lint")]
mod webidl_must_inherit;
/// Utilities for writing plugins
#[cfg(feature = "unrooted_must_root_lint")]
mod utils;
#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
let symbols = crate::Symbols::new();
#[cfg(feature = "unrooted_must_root_lint")]
reg.register_late_lint_pass(Box::new(unrooted_must_root::UnrootedPass::new(
symbols.clone(),
)));
#[cfg(feature = "webidl_lint")]
reg.register_late_lint_pass(Box::new(webidl_must_inherit::WebIdlPass::new(
symbols.clone(),
)));
reg.register_attribute(symbols.allow_unrooted_interior, Whitelisted);
reg.register_attribute(symbols.allow_unrooted_in_rc, Whitelisted);
reg.register_attribute(symbols.must_root, Whitelisted);
reg.register_attribute(symbols.webidl, Whitelisted);
}
macro_rules! symbols {
($($s: ident)+) => {
#[derive(Clone)]
#[allow(non_snake_case)]
struct Symbols {
$( $s: Symbol, )+
}
impl Symbols {
fn new() -> Self {
Symbols {
$( $s: Symbol::intern(stringify!($s)), )+
}
}
}
}
}
symbols! {
allow_unrooted_interior
allow_unrooted_in_rc
must_root
webidl
alloc
rc
Rc
cell
Ref
RefMut
slice
Iter
IterMut
collections
hash
map
set
Entry
OccupiedEntry
VacantEntry
}
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