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-rw-r--r--compiler/parser/Lexer.x7
1 files changed, 5 insertions, 2 deletions
diff --git a/compiler/parser/Lexer.x b/compiler/parser/Lexer.x
index 7e801dde21..fdf75cf003 100644
--- a/compiler/parser/Lexer.x
+++ b/compiler/parser/Lexer.x
@@ -2389,8 +2389,11 @@ dispatch_pragmas prags span buf len = case Map.lookup (clean_pragma (lexemeToStr
Nothing -> lexError "unknown pragma"
known_pragma :: Map String Action -> AlexAccPred Int
-known_pragma prags _ _ len (AI _ buf) = (isJust $ Map.lookup (clean_pragma (lexemeToString (offsetBytes (- len) buf) len)) prags)
- && (nextCharIsNot buf (\c -> isAlphaNum c || c == '_'))
+known_pragma prags _ (AI _ startbuf) _ (AI _ curbuf)
+ = isKnown && nextCharIsNot curbuf pragmaNameChar
+ where l = lexemeToString startbuf (byteDiff startbuf curbuf)
+ isKnown = isJust $ Map.lookup (clean_pragma l) prags
+ pragmaNameChar c = isAlphaNum c || c == '_'
clean_pragma :: String -> String
clean_pragma prag = canon_ws (map toLower (unprefix prag))