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author | Manish Goregaokar <manishsmail@gmail.com> | 2014-09-20 23:18:34 +0530 |
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committer | Manish Goregaokar <manishsmail@gmail.com> | 2014-09-23 17:37:27 +0530 |
commit | fcb25a35ec7586dfa280c4787d673a3525376942 (patch) | |
tree | b9fa11b8c10a58c96e06201cd97f2feda62f4761 /components/macros/lib.rs | |
parent | 6177a3bdcca974d5070b0ecab0973d42963946ec (diff) | |
download | servo-fcb25a35ec7586dfa280c4787d673a3525376942.tar.gz servo-fcb25a35ec7586dfa280c4787d673a3525376942.zip |
Rename macros crate to plugins
Diffstat (limited to 'components/macros/lib.rs')
-rw-r--r-- | components/macros/lib.rs | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/components/macros/lib.rs b/components/macros/lib.rs deleted file mode 100644 index b8db24baea1..00000000000 --- a/components/macros/lib.rs +++ /dev/null @@ -1,186 +0,0 @@ -/* 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/. */ - -#![feature(macro_rules, plugin_registrar, quote, phase)] - -#![deny(unused_imports, unused_variable)] - -//! Exports macros for use in other Servo crates. - -extern crate syntax; - -#[phase(plugin, link)] -extern crate rustc; -#[cfg(test)] -extern crate sync; - -use syntax::ast; -use syntax::attr::AttrMetaMethods; -use rustc::lint::{Context, LintPass, LintPassObject, LintArray}; -use rustc::plugin::Registry; -use rustc::middle::ty::expr_ty; -use rustc::middle::{ty, def}; -use rustc::middle::typeck::astconv::AstConv; -use rustc::util::ppaux::Repr; - -declare_lint!(TRANSMUTE_TYPE_LINT, Allow, - "Warn and report types being transmuted") -declare_lint!(UNROOTED_MUST_ROOT, Deny, - "Warn and report usage of unrooted jsmanaged objects") - -struct TransmutePass; -struct UnrootedPass; - -impl LintPass for TransmutePass { - fn get_lints(&self) -> LintArray { - lint_array!(TRANSMUTE_TYPE_LINT) - } - - fn check_expr(&mut self, cx: &Context, ex: &ast::Expr) { - match ex.node { - ast::ExprCall(ref expr, ref args) => { - match expr.node { - ast::ExprPath(ref path) => { - if path.segments.last() - .map_or(false, |ref segment| segment.identifier.name.as_str() == "transmute") - && args.len() == 1 { - let tcx = cx.tcx(); - cx.span_lint(TRANSMUTE_TYPE_LINT, ex.span, - format!("Transmute from {} to {} detected", - expr_ty(tcx, ex).repr(tcx), - expr_ty(tcx, &**args.get(0)).repr(tcx) - ).as_slice()); - } - } - _ => {} - } - } - _ => {} - } - } -} - -fn lint_unrooted_ty(cx: &Context, ty: &ast::Ty, warning: &str) { - match ty.node { - ast::TyBox(ref t) | ast::TyUniq(ref t) | - ast::TyVec(ref t) | ast::TyFixedLengthVec(ref t, _) | - ast::TyPtr(ast::MutTy { ty: ref t, ..}) | ast::TyRptr(_, ast::MutTy { ty: ref t, ..}) => lint_unrooted_ty(cx, &**t, warning), - ast::TyPath(_, _, id) => { - match cx.tcx.def_map.borrow().get_copy(&id) { - def::DefTy(def_id) => { - if ty::has_attr(cx.tcx, def_id, "must_root") { - cx.span_lint(UNROOTED_MUST_ROOT, ty.span, warning); - } - } - _ => (), - } - } - _ => (), - }; -} - -impl LintPass for UnrootedPass { - fn get_lints(&self) -> LintArray { - lint_array!(UNROOTED_MUST_ROOT) - } - - fn check_struct_def(&mut self, cx: &Context, def: &ast::StructDef, _i: ast::Ident, _gen: &ast::Generics, id: ast::NodeId) { - if cx.tcx.map.expect_item(id).attrs.iter().all(|a| !a.check_name("must_root")) { - for ref field in def.fields.iter() { - lint_unrooted_ty(cx, &*field.node.ty, - "Type must be rooted, use #[must_root] on the struct definition to propagate"); - } - } - } - - fn check_variant(&mut self, cx: &Context, var: &ast::Variant, _gen: &ast::Generics) { - let ref map = cx.tcx.map; - if map.expect_item(map.get_parent(var.node.id)).attrs.iter().all(|a| !a.check_name("must_root")) { - match var.node.kind { - ast::TupleVariantKind(ref vec) => { - for ty in vec.iter() { - lint_unrooted_ty(cx, &*ty.ty, - "Type must be rooted, use #[must_root] on the enum definition to propagate") - } - } - _ => () // Struct variants already caught by check_struct_def - } - } - } - - fn check_fn(&mut self, cx: &Context, kind: syntax::visit::FnKind, decl: &ast::FnDecl, - block: &ast::Block, _span: syntax::codemap::Span, _id: ast::NodeId) { - match kind { - syntax::visit::FkItemFn(i, _, _, _) | - syntax::visit::FkMethod(i, _, _) if i.as_str() == "new" || i.as_str() == "new_inherited" => { - return; - } - _ => () - } - match block.rules { - ast::DefaultBlock => { - for arg in decl.inputs.iter() { - lint_unrooted_ty(cx, &*arg.ty, - "Type must be rooted, use #[must_root] on the fn definition to propagate") - } - } - _ => () // fn is `unsafe` - } - } - - // Partially copied from rustc::middle::lint::builtin - // Catches `let` statements which store a #[must_root] value - // Expressions which return out of blocks eventually end up in a `let` - // statement or a function return (which will be caught when it is used elsewhere) - fn check_stmt(&mut self, cx: &Context, s: &ast::Stmt) { - // Catch the let binding - let expr = match s.node { - ast::StmtDecl(ref decl, _) => match decl.node { - ast::DeclLocal(ref loc) => match loc.init { - Some(ref e) => &**e, - _ => return - }, - _ => return - }, - _ => return - }; - - let t = expr_ty(cx.tcx, &*expr); - match ty::get(t).sty { - ty::ty_struct(did, _) | - ty::ty_enum(did, _) => { - if ty::has_attr(cx.tcx, did, "must_root") { - cx.span_lint(UNROOTED_MUST_ROOT, expr.span, - format!("Expression of type {} must be rooted", t.repr(cx.tcx)).as_slice()); - } - } - _ => {} - } - } -} - -#[plugin_registrar] -pub fn plugin_registrar(reg: &mut Registry) { - reg.register_lint_pass(box TransmutePass as LintPassObject); - reg.register_lint_pass(box UnrootedPass as LintPassObject); -} - -#[macro_export] -macro_rules! bitfield( - ($bitfieldname:ident, $getter:ident, $setter:ident, $value:expr) => ( - impl $bitfieldname { - #[inline] - pub fn $getter(self) -> bool { - let $bitfieldname(this) = self; - (this & $value) != 0 - } - - #[inline] - pub fn $setter(&mut self, value: bool) { - let $bitfieldname(this) = *self; - *self = $bitfieldname((this & !$value) | (if value { $value } else { 0 })) - } - } - ) -) |