commit f93bbd026205f36915312193784f987ad49fb114
author Bram Moolenaar <Bram@vim.org> Sat Apr 10 22:35:43 2021 +0200
committer Bram Moolenaar <Bram@vim.org> Sat Apr 10 22:35:43 2021 +0200
tree 3d33a10b9e526aa7ed613bb4113df3406025632a
parent e8e307818495d1a5d821df9bd4bde83add0520e5

patch 8.2.2753: Vim9: cannot ignore an item in assignment unpack

Problem:    Vim9: cannot ignore an item in assignment unpack.
Solution:   Allow using an underscore.

src/evalvars.c

diff --git a/src/evalvars.c b/src/evalvars.c
index 5869a82..b8a4352 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -970,8 +970,8 @@
     {
 	arg = skipwhite(arg + 1);
 	++var_idx;
-	arg = ex_let_one(arg, &item->li_tv, TRUE, flags, (char_u *)",;]",
-								  op, var_idx);
+	arg = ex_let_one(arg, &item->li_tv, TRUE,
+			  flags | ASSIGN_UNPACK, (char_u *)",;]", op, var_idx);
 	item = item->li_next;
 	if (arg == NULL)
 	    return FAIL;
@@ -996,8 +996,8 @@
 	    l->lv_refcount = 1;
 	    ++var_idx;
 
-	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE, flags,
-						   (char_u *)"]", op, var_idx);
+	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
+			    flags | ASSIGN_UNPACK, (char_u *)"]", op, var_idx);
 	    clear_tv(&ltv);
 	    if (arg == NULL)
 		return FAIL;
@@ -3190,7 +3190,9 @@
     var_in_vim9script = is_script_local && current_script_is_vim9();
     if (var_in_vim9script && name[0] == '_' && name[1] == NUL)
     {
-	emsg(_(e_cannot_use_underscore_here));
+	// For "[a, _] = list" the underscore is ignored.
+	if ((flags & ASSIGN_UNPACK) == 0)
+	    emsg(_(e_cannot_use_underscore_here));
 	goto failed;
     }