Add proc_macro::Span::{before, after}.

1 files changed, 6 insertions, 0 deletions

diff --git a/compiler/rustc_expand/src/proc_macro_server.rs b/compiler/rustc_expand/src/proc_macro_server.rs
index 92315c4d4f6..2507ad44307 100644
--- a/compiler/rustc_expand/src/proc_macro_server.rs
+++ b/compiler/rustc_expand/src/proc_macro_server.rs
@@ -738,6 +738,12 @@ impl server::Span for Rustc<'_> {
         let loc = self.sess.source_map().lookup_char_pos(span.hi());
         LineColumn { line: loc.line, column: loc.col.to_usize() }
     }
+    fn before(&mut self, span: Self::Span) -> Self::Span {
+        span.shrink_to_lo()
+    }
+    fn after(&mut self, span: Self::Span) -> Self::Span {
+        span.shrink_to_hi()
+    }
     fn join(&mut self, first: Self::Span, second: Self::Span) -> Option<Self::Span> {
         let self_loc = self.sess.source_map().lookup_char_pos(first.lo());
         let other_loc = self.sess.source_map().lookup_char_pos(second.lo());