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use ty;
use rustc_data_structures::indexed_vec::Idx;
use serialize::{self, Encoder, Decoder};
use std::fmt;
use std::u32;
#[derive(Clone, Copy, Eq, Ord, PartialOrd, PartialEq, Hash, Debug)]
pub struct CrateNum(u32);
impl Idx for CrateNum {
fn new(value: usize) -> Self {
assert!(value < (u32::MAX) as usize);
CrateNum(value as u32)
}
fn index(self) -> usize {
self.0 as usize
}
}
pub const LOCAL_CRATE: CrateNum = CrateNum(0);
pub const BUILTIN_MACROS_CRATE: CrateNum = CrateNum(!0);
impl CrateNum {
pub fn new(x: usize) -> CrateNum {
assert!(x < (u32::MAX as usize));
CrateNum(x as u32)
}
pub fn from_u32(x: u32) -> CrateNum {
CrateNum(x)
}
pub fn as_usize(&self) -> usize {
self.0 as usize
}
pub fn as_u32(&self) -> u32 {
self.0
}
}
impl fmt::Display for CrateNum {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.0, f)
}
}
impl serialize::UseSpecializedEncodable for CrateNum {
fn default_encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_u32(self.0)
}
}
impl serialize::UseSpecializedDecodable for CrateNum {
fn default_decode<D: Decoder>(d: &mut D) -> Result<CrateNum, D::Error> {
d.read_u32().map(CrateNum)
}
}
#[derive(Clone, Debug, Eq, Ord, PartialOrd, PartialEq, RustcEncodable,
RustcDecodable, Hash, Copy)]
pub struct DefIndex(u32);
impl DefIndex {
pub fn new(x: usize) -> DefIndex {
assert!(x < (u32::MAX as usize));
DefIndex(x as u32)
}
pub fn from_u32(x: u32) -> DefIndex {
DefIndex(x)
}
pub fn as_usize(&self) -> usize {
self.0 as usize
}
pub fn as_u32(&self) -> u32 {
self.0
}
}
pub const CRATE_DEF_INDEX: DefIndex = DefIndex(0);
#[derive(Clone, Eq, Ord, PartialOrd, PartialEq, RustcEncodable, RustcDecodable, Hash, Copy)]
pub struct DefId {
pub krate: CrateNum,
pub index: DefIndex,
}
impl fmt::Debug for DefId {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "DefId {{ krate: {:?}, node: {:?}",
self.krate, self.index)?;
ty::tls::with_opt(|opt_tcx| {
if let Some(tcx) = opt_tcx {
write!(f, " => {}", tcx.def_path(*self).to_string(tcx))?;
}
Ok(())
})?;
write!(f, " }}")
}
}
impl DefId {
pub fn local(index: DefIndex) -> DefId {
DefId { krate: LOCAL_CRATE, index: index }
}
pub fn is_local(&self) -> bool {
self.krate == LOCAL_CRATE
}
}