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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 http://mozilla.org/MPL/2.0/. */
//! Servo's compiler plugin/macro crate
//!
//! Attributes this crate provides:
//!
//! - `#[privatize]` : Forces all fields in a struct/enum to be private
//! - `#[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 `#[privatize]`,`#[jstraceable]`, and `#[must_root]`.
//! Use this for structs that correspond to a DOM type
#![feature(macro_rules, plugin_registrar, quote, phase, if_let)]
#![deny(unused_imports)]
#![deny(unused_variables)]
#[phase(plugin,link)]
extern crate syntax;
#[phase(plugin, link)]
extern crate rustc;
#[cfg(test)]
extern crate sync;
use rustc::lint::LintPassObject;
use rustc::plugin::Registry;
use syntax::ext::base::{Decorator, Modifier};
use syntax::parse::token::intern;
// Public for documentation to show up
/// Handles the auto-deriving for `#[jstraceable]`
pub mod jstraceable;
/// Autogenerates implementations of Reflectable on DOM structs
pub mod reflector;
pub mod lints;
/// Utilities for writing plugins
pub mod utils;
#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
reg.register_syntax_extension(intern("dom_struct"), Modifier(box jstraceable::expand_dom_struct));
reg.register_syntax_extension(intern("jstraceable"), Decorator(box jstraceable::expand_jstraceable));
reg.register_syntax_extension(intern("_generate_reflector"), Decorator(box reflector::expand_reflector));
reg.register_lint_pass(box lints::TransmutePass as LintPassObject);
reg.register_lint_pass(box lints::UnrootedPass as LintPassObject);
reg.register_lint_pass(box lints::PrivatizePass as LintPassObject);
reg.register_lint_pass(box lints::InheritancePass as LintPassObject);
}
#[macro_export]
macro_rules! define_css_keyword_enum {
($name: ident: $( $css: expr => $variant: ident ),+,) => {
define_css_keyword_enum!($name: $( $css => $variant ),+)
};
($name: ident: $( $css: expr => $variant: ident ),+) => {
#[allow(non_camel_case_types)]
#[deriving(Clone, Eq, PartialEq, FromPrimitive)]
pub enum $name {
$( $variant ),+
}
impl $name {
pub fn parse(component_value: &::cssparser::ast::ComponentValue) -> Result<$name, ()> {
match component_value {
&::cssparser::ast::Ident(ref value) => {
match_ignore_ascii_case! { value:
$( $css => Ok($name::$variant) ),+
_ => Err(())
}
}
_ => Err(())
}
}
}
impl ::std::fmt::Show for $name {
#[inline]
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
use cssparser::ToCss;
self.fmt_to_css(f)
}
}
impl ::cssparser::ToCss for $name {
fn to_css<W>(&self, dest: &mut W) -> ::text_writer::Result
where W: ::text_writer::TextWriter {
match self {
$( &$name::$variant => dest.write_str($css) ),+
}
}
}
}
}
#[macro_export]
macro_rules! match_ignore_ascii_case {
( $value: expr: $( $string: expr => $result: expr ),+ _ => $fallback: expr, ) => {
match_ignore_ascii_case! { $value:
$( $string => $result ),+
_ => $fallback
}
};
( $value: expr: $( $string: expr => $result: expr ),+ _ => $fallback: expr ) => {
{
use std::ascii::AsciiExt;
match $value.as_slice() {
$( s if s.eq_ignore_ascii_case($string) => $result, )+
_ => $fallback
}
}
};
}
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