Patch 8.2.2878

[Bram Moolenaar]

Patch 8.2.2878
Problem: Vim9: for loop list unpack only allows for one "_".
Solution: Drop the value when the variable is "_". (closes #8232)
Files: src/vim9compile.c, src/testdir/test_vim9_script.vim


*** ../vim-8.2.2877/src/vim9compile.c 2021-05-18 21:46:27.716961252 +0200
--- src/vim9compile.c 2021-05-22 21:38:40.990397825 +0200
***************
*** 7776,7781 ****
--- 7776,7787 ----
0, 0, type, name) == FAIL)
goto failed;
}
+ else if (varlen == 1 && *arg == '_')
+ {
+ // Assigning to "_": drop the value.
+ if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL)
+ goto failed;
+ }
else
{
if (lookup_local(arg, varlen, NULL, cctx) == OK)
*** ../vim-8.2.2877/src/testdir/test_vim9_script.vim 2021-04-28 20:40:39.799852470 +0200
--- src/testdir/test_vim9_script.vim 2021-05-22 21:36:27.779094661 +0200
***************
*** 2500,2505 ****
--- 2500,2511 ----
endfor
assert_equal(['global', 'buf', 'win', 'tab', '1', '2', '3', '4'], slist)
unlet! g:globalvar b:bufvar w:winvar t:tabvar
+
+ var res = []
+ for [_, n, _] in [[1, 2, 3], [4, 5, 6]]
+ res->add(n)
+ endfor
+ assert_equal([2, 5], res)
END
CheckDefAndScriptSuccess(lines)

*** ../vim-8.2.2877/src/version.c 2021-05-22 17:12:03.974528010 +0200
--- src/version.c 2021-05-22 21:35:07.099517132 +0200
***************
*** 752,753 ****
--- 752,755 ----
{ /* Add new patch number below this line */
+ /**/
+ 2878,
/**/

--
We do not stumble over mountains, but over molehills.
Confucius

/// Bram Moolenaar -- Br...@Moolenaar.net -- http://www.Moolenaar.net \\\
/// \\\
\\\ sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ ///
\\\ help me help AIDS victims -- http://ICCF-Holland.org ///