ENVIRONMENT_FLAG_FUNC
if (!(en->env_flags & ENVIRONMENT_FLAG_FUNC))
if ((en->env_flags & ENVIRONMENT_FLAG_FUNC) &&
if (flags & ENVIRONMENT_FLAG_FUNC) /* Callback registration */
en->env_flags |= ENVIRONMENT_FLAG_FUNC;
ENVIRONMENT_FLAG_FUNC) != RESULT_TRUE)
ENVIRONMENT_FLAG_FUNC) != RESULT_TRUE)
ENVIRONMENT_FLAG_FUNC | ENVIRONMENT_FLAG_REGEX) == -1) {