JS: fix implementation of forceBool to use JS backend syntax

compiler/GHC/HsToCore/Foreign/JavaScript.hs

@@ -639,7 +639,7 @@ jsResultWrapper result_ty
   | Just (tc,_) <- maybe_tc_app, tc `hasKey` boolTyConKey = do
 --    result_id <- newSysLocalDs boolTy
     ccall_uniq <- newUnique
-    let forceBool e = mkJsCall ccall_uniq (fsLit "$r = !(!$1)") [e] boolTy
+    let forceBool e = mkJsCall ccall_uniq (fsLit "((x) => { return !(!x); })") [e] boolTy
     return
      (Just intPrimTy, \e -> forceBool e)
 

testsuite/tests/javascript/T23101.hs

+
+foreign import javascript "(($1) => { return $1; })"
+  bool_id :: Bool -> Bool
+
+foreign import javascript "(($1) => { return !$1; })"
+  bool_not :: Bool -> Bool
+
+foreign import javascript "(($1) => { console.log($1); })"
+  bool_log :: Bool -> IO ()
+
+main :: IO ()
+main = do
+  bool_log True
+  bool_log False
+  bool_log (bool_id True)
+  bool_log (bool_id False)
+  bool_log (bool_not True)
+  bool_log (bool_not False)
+  print (bool_id True)
+  print (bool_id False)
+  print (bool_not True)
+  print (bool_not False)

testsuite/tests/javascript/T23101.stdout

+true
+false
+true
+false
+false
+true
+True
+False
+False
+True

testsuite/tests/javascript/all.T

+# These are JavaScript-specific tests
+setTestOpts(when(not(js_arch()),skip))
+
+test('T23101', normal, compile_and_run, [''])