commit e1d1211799bc37c063666e97437cf4e9af4782b0
author Bram Moolenaar <Bram@vim.org> Sat Mar 05 11:37:48 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Sat Mar 05 11:37:48 2022 +0000
tree 1a43103320c16459551d6ab64c4d02afd1947452
parent 330a388e18ad6b64c3574c712db675258b0e9878

patch 8.2.4509: Vim9: can declare a variable with ":va"

Problem:    Vim9: can declare a variable with ":va".
Solution:   Disallow using ":va", require using ":var".

src/evalvars.c

diff --git a/src/evalvars.c b/src/evalvars.c
index 40e643b..56ac3da 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -755,17 +755,24 @@
 ex_var(exarg_T *eap)
 {
     char_u *p = eap->cmd;
+    int	    has_var;
 
     if (!in_vim9script())
     {
 	semsg(_(e_str_cannot_be_used_in_legacy_vim_script), ":var");
 	return;
     }
-    if (current_sctx.sc_sid == 0 && checkforcmd_noparen(&p, "var", 3))
+    has_var = checkforcmd_noparen(&p, "var", 3);
+    if (current_sctx.sc_sid == 0 && has_var)
     {
 	emsg(_(e_cannot_declare_variable_on_command_line));
 	return;
     }
+    if (eap->arg > eap->cmd && !has_var)
+    {
+	emsg(_(e_must_use_var_instead_of_va));
+	return;
+    }
     ex_let(eap);
 }