patch 8.2.0605: Vim9: cannot unlet an environment variable
Problem: Vim9: cannot unlet an environment variable.
Solution: Implement unlet for $VAR.
diff --git a/src/vim9compile.c b/src/vim9compile.c
index c4a5c08..daa1cbe 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -990,12 +990,12 @@
* Generate an ISN_UNLET instruction.
*/
static int
-generate_UNLET(cctx_T *cctx, char_u *name, int forceit)
+generate_UNLET(cctx_T *cctx, isntype_T isn_type, char_u *name, int forceit)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
- if ((isn = generate_instr(cctx, ISN_UNLET)) == NULL)
+ if ((isn = generate_instr(cctx, isn_type)) == NULL)
return FAIL;
isn->isn_arg.unlet.ul_name = vim_strsave(name);
isn->isn_arg.unlet.ul_forceit = forceit;
@@ -4594,10 +4594,12 @@
// Normal name. Only supports g:, w:, t: and b: namespaces.
*name_end = NUL;
- if (check_vim9_unlet(p) == FAIL)
+ if (*p == '$')
+ ret = generate_UNLET(cctx, ISN_UNLETENV, p + 1, eap->forceit);
+ else if (check_vim9_unlet(p) == FAIL)
ret = FAIL;
else
- ret = generate_UNLET(cctx, p, eap->forceit);
+ ret = generate_UNLET(cctx, ISN_UNLET, p, eap->forceit);
*name_end = cc;
return ret;
@@ -6363,6 +6365,7 @@
break;
case ISN_UNLET:
+ case ISN_UNLETENV:
vim_free(isn->isn_arg.unlet.ul_name);
break;