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fix(charclass): make behavior with empty str match latest Vim (#19749)

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Later Vim patches changed to return 0 for empty string and null string.
Also update setcellwidth() docs to match latest Vim.
This commit is contained in:
zeertzjq
2022-08-13 12:25:01 +08:00
committed by GitHub
parent 754892e59d
commit 1de62b9ea1
3 changed files with 8 additions and 7 deletions
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5
runtime/doc/builtin.txt
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@@ -6840,7 +6840,7 @@ setcellwidths({list}) *setcellwidths()*
setcellwidths([[0xad, 0xad, 1],
\ [0x2194, 0x2199, 2]])
< *E1109* *E1110* *E1111* *E1112* *E1113*
< *E1109* *E1110* *E1111* *E1112* *E1113* *E1114*
The {list} argument is a list of lists with each three
numbers. These three numbers are [low, high, width]. "low"
and "high" can be the same, in which case this refers to one
@@ -6856,7 +6856,8 @@ setcellwidths({list}) *setcellwidths()*
To clear the overrides pass an empty list: >
setcellwidths([]);
< You can use the script $VIMRUNTIME/tools/emoji_list.vim to see
the effect for known emoji characters.
setcharpos({expr}, {list}) *setcharpos()*
Same as |setpos()| but uses the specified column number as the

6
src/nvim/mbyte.c
View File

@@ -2861,10 +2861,8 @@ void f_setcellwidths(typval_T *argvars, typval_T *rettv, FunPtr fptr)
void f_charclass(typval_T *argvars, typval_T *rettv, FunPtr fptr)
{
if (argvars[0].v_type != VAR_STRING
|| argvars[0].vval.v_string == NULL
|| *argvars[0].vval.v_string == NUL) {
emsg(_(e_stringreq));
if (tv_check_for_string(&argvars[0]) == FAIL
|| argvars[0].vval.v_string == NULL) {
return;
}
rettv->vval.v_number = mb_get_class((const char_u *)argvars[0].vval.v_string);

2
src/nvim/testdir/test_functions.vim
View File

@@ -1774,6 +1774,8 @@ func Test_charclass()
call assert_equal(1, charclass('.'))
call assert_equal(2, charclass('x'))
call assert_equal(3, charclass("\u203c"))
" this used to crash vim
call assert_equal(0, "xxx"[-1]->charclass())
endfunc
func Test_eventhandler()