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patch 8.2.1463: Vim9: list slice not supported yet

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Problem:    Vim9: list slice not supported yet.
Solution:   Add support for list slicing.
This commit is contained in:
Bram Moolenaar
2020-08-15 22:14:53 +02:00
parent 11107bab7e
commit ed5918771f
9 changed files with 175 additions and 57 deletions
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44
src/eval.c
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@@ -3803,43 +3803,13 @@ eval_index(
break;
case VAR_LIST:
len = list_len(rettv->vval.v_list);
if (n1 < 0)
n1 = len + n1;
if (!empty1 && (n1 < 0 || n1 >= len))
{
// For a range we allow invalid values and return an empty
// list. A list index out of range is an error.
if (!range)
{
if (verbose)
semsg(_(e_listidx), n1);
return FAIL;
}
n1 = len;
}
if (range)
{
list_T *l;
if (n2 < 0)
n2 = len + n2;
else if (n2 >= len)
n2 = len - 1;
if (!empty2 && (n2 < 0 || n2 + 1 < n1))
n2 = -1;
l = list_slice(rettv->vval.v_list, n1, n2);
if (l == NULL)
return FAIL;
clear_tv(rettv);
rettv_list_set(rettv, l);
}
else
{
copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1);
clear_tv(rettv);
*rettv = var1;
}
if (empty1)
n1 = 0;
if (empty2)
n2 = -1;
if (list_slice_or_index(rettv->vval.v_list,
range, n1, n2, rettv, verbose) == FAIL)
return FAIL;
break;
case VAR_DICT: