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patch 7.4.1163

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Problem:    Expressions "0 + v:true" and "'' . v:true" cause an error.
Solution:   Return something sensible when using a special variable as a
            number or as a string. (suggested by Damien)
This commit is contained in:
Bram Moolenaar
2016-01-24 14:22:10 +01:00
parent 9e3be26872
commit 17a13437c9
3 changed files with 34 additions and 8 deletions
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30
src/eval.c
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@@ -7820,6 +7820,20 @@ failret:
return OK;
}
static char *
get_var_special_name(int nr)
{
switch (nr)
{
case VVAL_FALSE: return "false";
case VVAL_TRUE: return "true";
case VVAL_NONE: return "none";
case VVAL_NULL: return "null";
}
EMSG2(_(e_intern2), "get_var_special_name()");
return "42";
}
/*
* Return a string with the string representation of a variable.
* If the memory is allocated "tofree" is set to it, otherwise NULL.
@@ -7914,14 +7928,7 @@ echo_string(tv, tofree, numbuf, copyID)
case VAR_SPECIAL:
*tofree = NULL;
switch (tv->vval.v_number)
{
case VVAL_FALSE: r = (char_u *)"false"; break;
case VVAL_TRUE: r = (char_u *)"true"; break;
case VVAL_NONE: r = (char_u *)"none"; break;
case VVAL_NULL: r = (char_u *)"null"; break;
default: EMSG2(_(e_intern2), "echo_string(special)");
}
r = (char_u *)get_var_special_name(tv->vval.v_number);
break;
default:
@@ -21704,6 +21711,9 @@ get_tv_number_chk(varp, denote)
case VAR_DICT:
EMSG(_("E728: Using a Dictionary as a Number"));
break;
case VAR_SPECIAL:
return varp->vval.v_number == VVAL_TRUE ? 1 : 0;
break;
default:
EMSG2(_(e_intern2), "get_tv_number()");
break;
@@ -21859,6 +21869,10 @@ get_tv_string_buf_chk(varp, buf)
if (varp->vval.v_string != NULL)
return varp->vval.v_string;
return (char_u *)"";
case VAR_SPECIAL:
STRCPY(buf, get_var_special_name(varp->vval.v_number));
return buf;
default:
EMSG2(_(e_intern2), "get_tv_string_buf()");
break;