diff options
Diffstat (limited to 'src/libsyntax_pos')
| -rw-r--r-- | src/libsyntax_pos/hygiene.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax_pos/hygiene.rs b/src/libsyntax_pos/hygiene.rs index 1dba466625a..4d9496f94fb 100644 --- a/src/libsyntax_pos/hygiene.rs +++ b/src/libsyntax_pos/hygiene.rs @@ -603,7 +603,9 @@ pub struct ExpnInfo { pub call_site: Span, // --- The part specific to the macro/desugaring definition. - // --- FIXME: Share it between expansions with the same definition. + // --- It may be reasonable to share this part between expansions with the same definition, + // --- but such sharing is known to bring some minor inconveniences without also bringing + // --- noticeable perf improvements (PR #62898). /// The span of the macro definition (possibly dummy). /// This span serves only informational purpose and is not used for resolution. pub def_site: Span, |