56 lines
1.7 KiB
Rust
56 lines
1.7 KiB
Rust
|
// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
|
||
|
|
// file at the top-level directory of this distribution and at
|
||
|
|
// http://rust-lang.org/COPYRIGHT.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||
|
|
// option. This file may not be copied, modified, or distributed
|
||
|
|
// except according to those terms.
|
||
|
|
|
||
|
|
use syntax::ast::{CrateNum, NodeId};
|
||
|
|
use std::cell::Cell;
|
||
|
|
use std::fmt;
|
||
|
|
|
||
|
|
#[derive(Clone, Eq, Ord, PartialOrd, PartialEq, RustcEncodable,
|
||
|
|
RustcDecodable, Hash, Copy)]
|
||
|
|
pub struct DefId {
|
||
|
|
pub krate: CrateNum,
|
||
|
|
pub node: NodeId,
|
||
|
|
}
|
||
|
|
|
||
|
|
fn default_def_id_debug(_: DefId, _: &mut fmt::Formatter) -> fmt::Result { Ok(()) }
|
||
|
|
|
||
|
|
thread_local!(pub static DEF_ID_DEBUG: Cell<fn(DefId, &mut fmt::Formatter) -> fmt::Result> =
|
||
|
|
Cell::new(default_def_id_debug));
|
||
|
|
|
||
|
|
impl fmt::Debug for DefId {
|
||
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||
|
|
try!(write!(f, "DefId {{ krate: {}, node: {} }}",
|
||
|
|
self.krate, self.node));
|
||
|
|
DEF_ID_DEBUG.with(|def_id_debug| def_id_debug.get()(*self, f))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl DefId {
|
||
|
|
pub fn local(id: NodeId) -> DefId {
|
||
|
|
DefId { krate: LOCAL_CRATE, node: id }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Read the node id, asserting that this def-id is krate-local.
|
||
|
|
pub fn local_id(&self) -> NodeId {
|
||
|
|
assert_eq!(self.krate, LOCAL_CRATE);
|
||
|
|
self.node
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn is_local(&self) -> bool {
|
||
|
|
self.krate == LOCAL_CRATE
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/// Item definitions in the currently-compiled crate would have the CrateNum
|
||
|
|
/// LOCAL_CRATE in their DefId.
|
||
|
|
pub const LOCAL_CRATE: CrateNum = 0;
|
||
|
|
|