patch 9.0.2182: Vim9: need a way to reserve future extension
Problem: Vim9: need a way to reserve future extension
Solution: reserve double underscore prefix for future use
(Yegappan Lakshmanan)
related: #13238
closes: #13742
Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index c28716a..e2c61b0 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -9659,4 +9659,31 @@
v9.CheckSourceFailure(lines, 'E1022: Type or initialization required', 3)
enddef
+" Test for using double underscore prefix in a class/object method name.
+def Test_method_double_underscore_prefix()
+ # class method
+ var lines =<< trim END
+ vim9script
+ class A
+ static def __foo()
+ echo "foo"
+ enddef
+ endclass
+ defcompile
+ END
+ v9.CheckSourceFailure(lines, 'E1034: Cannot use reserved name __foo()', 3)
+
+ # object method
+ lines =<< trim END
+ vim9script
+ class A
+ def __foo()
+ echo "foo"
+ enddef
+ endclass
+ defcompile
+ END
+ v9.CheckSourceFailure(lines, 'E1034: Cannot use reserved name __foo()', 3)
+enddef
+
" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker