1 use rustc_index::vec::Idx;
2 use rustc_serialize::{Decoder, Encoder};
4 use syntax_pos::ExpnId;
6 rustc_index::newtype_index! {
9 DEBUG_FORMAT = "NodeId({})"
14 pub fn placeholder_from_expn_id(expn_id: ExpnId) -> Self {
15 NodeId::from_u32(expn_id.as_u32())
18 pub fn placeholder_to_expn_id(self) -> ExpnId {
19 ExpnId::from_u32(self.as_u32())
23 impl fmt::Display for NodeId {
24 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
25 fmt::Display::fmt(&self.as_u32(), f)
29 impl rustc_serialize::UseSpecializedEncodable for NodeId {
30 fn default_encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
31 s.emit_u32(self.as_u32())
35 impl rustc_serialize::UseSpecializedDecodable for NodeId {
36 fn default_decode<D: Decoder>(d: &mut D) -> Result<NodeId, D::Error> {
37 d.read_u32().map(NodeId::from_u32)