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Cleanup match_lang_ty a bit.

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Ms2ger 2015-02-13 00:02:18 +01:00
parent 69259e9975
commit 542f62ae94
1 changed files with 22 additions and 18 deletions
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40
components/plugins/utils.rs
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@ -38,26 +38,30 @@ pub fn match_ty_unwrap<'a>(ty: &'a Ty, segments: &[&str]) -> Option<&'a [P<Ty>]>
/// Checks if a type has a #[servo_lang = "str"] attribute
pub fn match_lang_ty(cx: &Context, ty: &Ty, value: &str) -> bool {
let mut found = false;
if let TyPath(_, ty_id) = ty.node {
if let Some(def::DefTy(def_id, _)) = cx.tcx.def_map.borrow().get(&ty_id).cloned() {
// Iterating through attributes is hard because of cross-crate defs
for attr in ty::get_attrs(cx.tcx, def_id).iter() {
if let ast::MetaNameValue(ref name, ref val) = attr.node.value.node {
if &**name == "servo_lang" {
if let ast::LitStr(ref v, _) = val.node {
if &**v == value {
mark_used(attr);
found = true;
break
}
}
}
let ty_id = match ty.node {
TyPath(_, ty_id) => ty_id,
_ => return false,
};
let def_id = match cx.tcx.def_map.borrow().get(&ty_id).cloned() {
Some(def::DefTy(def_id, _)) => def_id,
_ => return false,
};
ty::get_attrs(cx.tcx, def_id).iter().any(|attr| {
match attr.node.value.node {
ast::MetaNameValue(ref name, ref val) if &**name == "servo_lang" => {
match val.node {
ast::LitStr(ref v, _) if &**v == value => {
mark_used(attr);
true
},
_ => false,
}
}
};
}
found
_ => false,
}
})
}
// Determines if a block is in an unsafe context so that an unhelpful