patch 8.2.3276: Vim9: exists() can only be evaluated at runtime
Problem: Vim9: exists() can only be evaluated at runtime.
Solution: Evaluate at compile time for option name literals. (closes #8437)
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 15e6e63..c4eed54 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -3395,8 +3395,10 @@
int is_autoload;
int is_searchpair;
- // we can evaluate "has('name')" at compile time
- if (varlen == 3 && STRNCMP(*arg, "has", 3) == 0)
+ // We can evaluate "has('name')" at compile time.
+ // We can evaluate some "exists()" values at compile time.
+ if ((varlen == 3 && STRNCMP(*arg, "has", 3) == 0)
+ || (varlen == 6 && STRNCMP(*arg, "exists", 6) == 0))
{
char_u *s = skipwhite(*arg + varlen + 1);
typval_T argvars[2];
@@ -3408,7 +3410,9 @@
(void)eval_lit_string(&s, &argvars[0], TRUE);
s = skipwhite(s);
if (*s == ')' && argvars[0].v_type == VAR_STRING
- && !dynamic_feature(argvars[0].vval.v_string))
+ && ((**arg == 'h' && !dynamic_feature(argvars[0].vval.v_string))
+ || (**arg == 'e' && (*argvars[0].vval.v_string == '+'
+ || *argvars[0].vval.v_string == '&'))))
{
typval_T *tv = &ppconst->pp_tv[ppconst->pp_used];
@@ -3416,7 +3420,10 @@
argvars[1].v_type = VAR_UNKNOWN;
tv->v_type = VAR_NUMBER;
tv->vval.v_number = 0;
- f_has(argvars, tv);
+ if (**arg == 'h')
+ f_has(argvars, tv);
+ else
+ f_exists(argvars, tv);
clear_tv(&argvars[0]);
++ppconst->pp_used;
return OK;