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patch 8.2.0605: Vim9: cannot unlet an environment variable

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Problem:    Vim9: cannot unlet an environment variable.
Solution:   Implement unlet for $VAR.
This commit is contained in:
Bram Moolenaar
2020-04-19 18:27:26 +02:00
parent eb58a24658
commit 7bdaea6e0d
6 changed files with 27 additions and 5 deletions
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11
src/vim9compile.c
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@@ -990,12 +990,12 @@ generate_LOADV(
* Generate an ISN_UNLET instruction.
*/
static int
generate_UNLET(cctx_T *cctx, char_u *name, int forceit)
generate_UNLET(cctx_T *cctx, isntype_T isn_type, char_u *name, int forceit)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_UNLET)) == NULL)
if ((isn = generate_instr(cctx, isn_type)) == NULL)
return FAIL;
isn->isn_arg.unlet.ul_name = vim_strsave(name);
isn->isn_arg.unlet.ul_forceit = forceit;
@@ -4594,10 +4594,12 @@ compile_unlet(
// Normal name. Only supports g:, w:, t: and b: namespaces.
*name_end = NUL;
if (check_vim9_unlet(p) == FAIL)
if (*p == '$')
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 @@ delete_instr(isn_T *isn)
break;
case ISN_UNLET:
case ISN_UNLETENV:
vim_free(isn->isn_arg.unlet.ul_name);
break;