commit c2ca935d26b3fc64a13d4e7d0583fc787efe61d0
author Bram Moolenaar <Bram@vim.org> Wed Nov 25 21:30:11 2020 +0100
committer Bram Moolenaar <Bram@vim.org> Wed Nov 25 21:30:11 2020 +0100
tree 10d49b2710dc2b83574f44f7cee9d56c25a29f47
parent 47a2abf0bc3c3dac0433754ad0365ebad152df8c

patch 8.2.2053: Vim9: lamba doesn't accept argument types

Problem:    Vim9: lamba doesn't accept argument types.
Solution:   Optionally accept argument types at the script level.

src/testdir/test_vim9_expr.vim

diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index 02f8c0a..57307a2 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1828,6 +1828,9 @@
 
       assert_equal(false, LambdaUsingArg(0)())
       assert_equal(true, LambdaUsingArg(1)())
+
+      var res = map([1, 2, 3], {i: number, v: number -> i + v})
+      assert_equal([1, 3, 5], res)
   END
   CheckDefAndScriptSuccess(lines)