patch 9.1.0548: it's not possible to get a unique id for some vars
Problem: it's not possible to get a unique id for some vars
Solution: Add the id() Vim script function, which returns a unique
identifier for object, dict, list, job, blob or channel
variables (Ernie Rael)
fixes: #14374
closes: #15145
Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_listdict.vim b/src/testdir/test_listdict.vim
index 0a4f88c..48217cf 100644
--- a/src/testdir/test_listdict.vim
+++ b/src/testdir/test_listdict.vim
@@ -1619,4 +1619,34 @@
call v9.CheckLegacyAndVim9Success(lines)
endfunc
+" Test for using id()
+def Test_id_with_dict()
+ # demonstate a way that "id(item)" differs from "string(item)"
+ var d1 = {one: 1}
+ var d2 = {one: 1}
+ var d3 = {one: 1}
+ var idDict: dict<any>
+ idDict[id(d1)] = d1
+ idDict[id(d2)] = d2
+ idDict[id(d3)] = d3
+ assert_equal(3, idDict->len())
+
+ var stringDict: dict<any>
+ stringDict[string(d1)] = d1
+ stringDict[string(d2)] = d2
+ stringDict[string(d3)] = d3
+ assert_equal(1, stringDict->len())
+
+ assert_equal('', id(3))
+
+ assert_equal('', id(null))
+ assert_equal('', id(null_blob))
+ assert_equal('', id(null_dict))
+ assert_equal('', id(null_function))
+ assert_equal('', id(null_list))
+ assert_equal('', id(null_partial))
+ assert_equal('', id(null_string))
+ assert_equal('', id(null_channel))
+ assert_equal('', id(null_job))
+enddef
" vim: shiftwidth=2 sts=2 expandtab