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patch 8.2.3314: behavior of exists() in a :def function is unpredictable

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Problem:    Behavior of exists() in a :def function is unpredictable.
Solution:   Add exists_compiled().
This commit is contained in:
Bram Moolenaar
2021-08-08 14:43:22 +02:00
parent 9e2fa4bb9e
commit 267359902c
7 changed files with 78 additions and 25 deletions
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12
src/vim9compile.c
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@@ -3415,9 +3415,9 @@ compile_call(
int is_searchpair;
// We can evaluate "has('name')" at compile time.
// We can evaluate some "exists()" values at compile time.
// We always evaluate "exists_compiled()" at compile time.
if ((varlen == 3 && STRNCMP(*arg, "has", 3) == 0)
|| (varlen == 6 && STRNCMP(*arg, "exists", 6) == 0))
|| (varlen == 15 && STRNCMP(*arg, "exists_compiled", 6) == 0))
{
char_u *s = skipwhite(*arg + varlen + 1);
typval_T argvars[2];
@@ -3431,8 +3431,7 @@ compile_call(
s = skipwhite(s);
if (*s == ')' && argvars[0].v_type == VAR_STRING
&& ((is_has && !dynamic_feature(argvars[0].vval.v_string))
|| (!is_has && vim_strchr((char_u *)"+&:*",
*argvars[0].vval.v_string))))
|| !is_has))
{
typval_T *tv = &ppconst->pp_tv[ppconst->pp_used];
@@ -3449,6 +3448,11 @@ compile_call(
return OK;
}
clear_tv(&argvars[0]);
if (!is_has)
{
emsg(_(e_argument_of_exists_compiled_must_be_literal_string));
return FAIL;
}
}
if (generate_ppconst(cctx, ppconst) == FAIL)