bool psi_num_exp_validate(struct psi_data *data, struct psi_num_exp *exp,
struct psi_validate_scope *scope);
token_t psi_num_exp_exec(struct psi_num_exp *exp, impl_val *res,
bool psi_num_exp_validate(struct psi_data *data, struct psi_num_exp *exp,
struct psi_validate_scope *scope);
token_t psi_num_exp_exec(struct psi_num_exp *exp, impl_val *res,