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patch 8.2.2344: using inclusive index for slice is not always desired

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Problem:    Using inclusive index for slice is not always desired.
Solution:   Add the slice() method, which has an exclusive index. (closes
            #7408)
This commit is contained in:
Bram Moolenaar
2021-01-13 21:47:15 +01:00
parent c423ad77ed
commit 6601b62943
11 changed files with 106 additions and 28 deletions
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13
src/list.c
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@@ -905,14 +905,15 @@ list_slice(list_T *ol, long n1, long n2)
list_slice_or_index(
list_T *list,
int range,
long n1_arg,
long n2_arg,
varnumber_T n1_arg,
varnumber_T n2_arg,
int exclusive,
typval_T *rettv,
int verbose)
{
long len = list_len(list);
long n1 = n1_arg;
long n2 = n2_arg;
varnumber_T n1 = n1_arg;
varnumber_T n2 = n2_arg;
typval_T var1;
if (n1 < 0)
@@ -936,7 +937,9 @@ list_slice_or_index(
if (n2 < 0)
n2 = len + n2;
else if (n2 >= len)
n2 = len - 1;
n2 = len - (exclusive ? 0 : 1);
if (exclusive)
--n2;
if (n2 < 0 || n2 + 1 < n1)
n2 = -1;
l = list_slice(list, n1, n2);