Function rustc_span::hygiene::update_disambiguator
source · fn update_disambiguator(
expn_data: &mut ExpnData,
ctx: impl HashStableContext
) -> ExpnHash
Expand description
Updates the disambiguator
field of the corresponding ExpnData
such that the Fingerprint
of the ExpnData
does not collide with
any other ExpnIds
.
This method is called only when an ExpnData
is first associated
with an ExpnId
(when the ExpnId
is initially constructed, or via
set_expn_data
). It is not called for foreign ExpnId
s deserialized
from another crate’s metadata - since ExpnHash
includes the stable crate id,
collisions are only possible between ExpnId
s within the same crate.