patch 8.2.2878: Vim9: for loop list unpack only allows for one "_"
Problem: Vim9: for loop list unpack only allows for one "_".
Solution: Drop the value when the variable is "_". (closes #8232)
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 0e77b58..7114ae4 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -2500,6 +2500,12 @@
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)
diff --git a/src/version.c b/src/version.c
index 82ecd0a..0223ae2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 2878,
+/**/
2877,
/**/
2876,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 5e912dd..cb91c3c 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -7776,6 +7776,12 @@
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)