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use ty;
use rustc_data_structures::indexed_vec::Idx;
use serialize;
use std::fmt;
use std::u32;
newtype_index!(CrateNum
{
ENCODABLE = custom
DEBUG_FORMAT = "crate{}",
const LOCAL_CRATE = 0,
const BUILTIN_MACROS_CRATE = u32::MAX,
const INVALID_CRATE = u32::MAX - 1,
const RESERVED_FOR_INCR_COMP_CACHE = u32::MAX - 2,
});
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
}
pub fn as_def_id(&self) -> DefId { DefId { krate: *self, index: CRATE_DEF_INDEX } }
}
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 {}
impl serialize::UseSpecializedDecodable for CrateNum {}
#[derive(Clone, Eq, Ord, PartialOrd, PartialEq, Hash, Copy)]
pub struct DefIndex(u32);
pub const CRATE_DEF_INDEX: DefIndex = DefIndex(0);
impl fmt::Debug for DefIndex {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f,
"DefIndex({}:{})",
self.address_space().index(),
self.as_array_index())
}
}
impl DefIndex {
#[inline]
pub fn address_space(&self) -> DefIndexAddressSpace {
match self.0 & 1 {
0 => DefIndexAddressSpace::Low,
1 => DefIndexAddressSpace::High,
_ => unreachable!()
}
}
#[inline]
pub fn as_array_index(&self) -> usize {
(self.0 >> 1) as usize
}
#[inline]
pub fn from_array_index(i: usize, address_space: DefIndexAddressSpace) -> DefIndex {
DefIndex::from_raw_u32(((i << 1) | (address_space as usize)) as u32)
}
pub fn from_proc_macro_index(proc_macro_index: usize) -> DefIndex {
let def_index = DefIndex::from_array_index(proc_macro_index,
DefIndexAddressSpace::High);
assert!(def_index != CRATE_DEF_INDEX);
def_index
}
pub fn to_proc_macro_index(self: DefIndex) -> usize {
self.as_array_index()
}
pub fn from_raw_u32(x: u32) -> DefIndex {
DefIndex(x)
}
pub fn as_raw_u32(&self) -> u32 {
self.0
}
}
impl serialize::UseSpecializedEncodable for DefIndex {}
impl serialize::UseSpecializedDecodable for DefIndex {}
#[derive(Copy, Clone, Eq, PartialEq, Hash)]
pub enum DefIndexAddressSpace {
Low = 0,
High = 1,
}
impl DefIndexAddressSpace {
#[inline]
pub fn index(&self) -> usize {
*self as usize
}
}
#[derive(Clone, Eq, Ord, PartialOrd, PartialEq, 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({:?}/{}:{}",
self.krate.index(),
self.index.address_space().index(),
self.index.as_array_index())?;
ty::tls::with_opt(|opt_tcx| {
if let Some(tcx) = opt_tcx {
write!(f, " ~ {}", tcx.def_path_debug_str(*self))?;
}
Ok(())
})?;
write!(f, ")")
}
}
impl DefId {
#[inline]
pub fn local(index: DefIndex) -> DefId {
DefId { krate: LOCAL_CRATE, index: index }
}
#[inline]
pub fn is_local(self) -> bool {
self.krate == LOCAL_CRATE
}
#[inline]
pub fn to_local(self) -> LocalDefId {
LocalDefId::from_def_id(self)
}
}
impl serialize::UseSpecializedEncodable for DefId {}
impl serialize::UseSpecializedDecodable for DefId {}
#[derive(Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct LocalDefId(DefIndex);
impl LocalDefId {
#[inline]
pub fn from_def_id(def_id: DefId) -> LocalDefId {
assert!(def_id.is_local());
LocalDefId(def_id.index)
}
#[inline]
pub fn to_def_id(self) -> DefId {
DefId {
krate: LOCAL_CRATE,
index: self.0
}
}
}
impl fmt::Debug for LocalDefId {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.to_def_id().fmt(f)
}
}
impl serialize::UseSpecializedEncodable for LocalDefId {}
impl serialize::UseSpecializedDecodable for LocalDefId {}