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-rw-r--r--rust-mode.el3
1 files changed, 3 insertions, 0 deletions
diff --git a/rust-mode.el b/rust-mode.el
index 5b53277..2307cc0 100644
--- a/rust-mode.el
+++ b/rust-mode.el
@@ -866,6 +866,9 @@ the desired identifiers), but does not match type annotations \"foo::<\"."
((rust-looking-back-symbols rust-mode-keywords)
(rust-looking-back-symbols '("self" "true" "false")))
+ ((rust-looking-back-str "?")
+ (rust-is-in-expression-context 'ambiguous-operator))
+
;; If we're looking back at an identifier, this depends on whether
;; the identifier is part of an expression or a type
((rust-looking-back-ident)