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eval: Make sure that b:changedtick may not be unlocked via :unlo b:var

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It still may be unlocked by `:unlock b:.var`.
This commit is contained in:
ZyX
2017-02-20 22:04:20 +03:00
parent 908e53d98d
commit f2c9fd312c
3 changed files with 28 additions and 13 deletions
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28
src/nvim/eval.c
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@@ -170,6 +170,8 @@ static char *e_letwrong = N_("E734: Wrong variable type for %s=");
static char *e_nofunc = N_("E130: Unknown function: %s");
static char *e_illvar = N_("E461: Illegal variable name: %s");
static char *e_float_as_string = N_("E806: using Float as a String");
static const char *e_readonlyvar = N_(
"E46: Cannot change read-only variable \"%.*s\"");
static char_u * const empty_string = (char_u *)"";
static char_u * const namespace_char = (char_u *)"abglstvw";
@@ -3057,29 +3059,33 @@ int do_unlet(char_u *name, int forceit)
static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock)
{
int ret = OK;
int cc;
dictitem_T *di;
if (deep == 0) /* nothing to do */
if (deep == 0) { // Nothing to do.
return OK;
}
if (lp->ll_tv == NULL) {
cc = *name_end;
*name_end = NUL;
// Normal name or expanded name.
di = find_var((const char *)lp->ll_name, STRLEN(lp->ll_name), NULL, true);
const size_t name_len = (size_t)(name_end - lp->ll_name);
dictitem_T *const di = find_var(
(const char *)lp->ll_name, name_len, NULL,
true);
if (di == NULL) {
ret = FAIL;
} else {
if (lock) {
if ((di->di_flags & (DI_FLAGS_LOCK|DI_FLAGS_FIX))
== (DI_FLAGS_LOCK|DI_FLAGS_FIX)) {
// Locked and fixed: do not alter lock, but issue an error.
// Provides compatibility with former `unlockvar b:changedtick`
// behaviour.
emsgf(_(e_readonlyvar), (int)name_len, lp->ll_name);
} else if (lock) {
di->di_flags |= DI_FLAGS_LOCK;
} else {
di->di_flags &= ~DI_FLAGS_LOCK;
}
item_lock(&di->di_tv, deep, lock);
}
*name_end = cc;
} else if (lp->ll_range) {
listitem_T *li = lp->ll_li;
@@ -20542,7 +20548,9 @@ set_var (
static bool var_check_ro(int flags, char_u *name, bool use_gettext)
{
if (flags & DI_FLAGS_RO) {
EMSG2(_(e_readonlyvar), use_gettext ? (char_u *)_(name) : name);
const char_u *const name_translated = (
use_gettext ? (char_u *)_(name) : name);
emsgf(_(e_readonlyvar), (int)STRLEN(name_translated), name_translated);
return true;
}
if ((flags & DI_FLAGS_RO_SBX) && sandbox) {