branch: elpa/rust-mode
commit c49bb125fc9beb835ffee8d78625cbe7541dd262
Author: Ben Segall <[email protected]>
Commit: Ben Segall <[email protected]>
Cache (regexp-opt rust-special-types 'symbols) in rust-is-lt-char-operator
regexp-opt is generally intended to be cached, and the extra GC was
causing noticeable lag when typing sometimes.
---
rust-mode.el | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/rust-mode.el b/rust-mode.el
index 40a2492..e451dfa 100644
--- a/rust-mode.el
+++ b/rust-mode.el
@@ -378,6 +378,7 @@
;; newer Emacs versions, but will work on Emacs 23.)
(defun regexp-opt-symbols (words)
(concat "\\_<" (regexp-opt words t) "\\_>"))
+(defconst rust-re-special-types (regexp-opt-symbols rust-special-types))
(defvar rust-mode-font-lock-keywords
(append
@@ -851,7 +852,7 @@
(or
;; The special types can't take type param lists, so a < after one is
;; always an operator
- (looking-at (regexp-opt rust-special-types 'symbols))
+ (looking-at rust-re-special-types)
(rust-is-in-expression-context 'ident)))
