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ca59d5a7bd
Fix this error in the new Rust Nightly:
```rust
Compiling script v0.0.1 (file:///home/simon/servo2/components/script)
error[E0599]: no method named `trace` found for type `&fn(&dom::node::Node) -> u16` in the current scope
--> /home/simon/servo2/components/script/dom/treewalker.rs:464:10
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464 | #[derive(JSTraceable)]
| ^^^^^^^^^^^
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= note: JSTraceable is a function, perhaps you wish to call it
= help: items from traits can only be used if the trait is implemented and in scope
= note: the following trait defines an item `trace`, perhaps you need to implement it:
candidate #1: `dom::bindings::trace::JSTraceable`
error: aborting due to previous error
error: Could not compile `script`.
```
~I’ve tried to reproduce it in a minimal test case, but `impl<A, B> SomeTrait for fn(A) -> B` did not apply for `fn(&u32) -> u32` even on Rust 1.19.0 stable. So I don’t know what changed.~ This is very likely https://github.com/servo/servo/pull/18327.
Source-Repo: https://github.com/servo/servo
Source-Revision: fd833d9f18cd9196502b9768ab0ac8c1498b2f68
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 6abcf458330540d23b69aad3d41f2fe4429fba5a
42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use rustc::hir::def_id::DefId;
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use rustc::lint::LateContext;
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use syntax::codemap::{ExpnFormat, Span};
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/// check if a DefId's path matches the given absolute type path
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/// usage e.g. with
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/// `match_def_path(cx, id, &["core", "option", "Option"])`
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pub fn match_def_path(cx: &LateContext, def_id: DefId, path: &[&str]) -> bool {
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let krate = &cx.tcx.crate_name(def_id.krate);
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if krate != &path[0] {
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return false;
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}
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let path = &path[1..];
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let other = cx.tcx.def_path(def_id).data;
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if other.len() != path.len() {
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return false;
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}
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other.into_iter()
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.map(|e| e.data)
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.zip(path)
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.all(|(nm, p)| &*nm.as_interned_str() == *p)
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}
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pub fn in_derive_expn(span: Span) -> bool {
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if let Some(i) = span.ctxt().outer().expn_info() {
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if let ExpnFormat::MacroAttribute(n) = i.callee.format {
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n.as_str().contains("derive")
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} else {
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false
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}
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} else {
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false
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}
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}
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