Exemplos de declaration::get_num_univ_params em C++ (Cpp)

Exemplo n.º 1

Arquivo: find_cmd.cpp Projeto: cpehle/lean

bool match_pattern(type_checker & tc, expr const & pattern, declaration const & d, unsigned max_steps, bool cheap) {
    name_generator ngen = tc.mk_ngen();
     buffer<level> ls;
    unsigned num_ls = d.get_num_univ_params();
    for (unsigned i = 0; i < num_ls; i++)
        ls.push_back(mk_meta_univ(ngen.next()));
    expr dt        = instantiate_type_univ_params(d, to_list(ls.begin(), ls.end()));

    unsigned num_e = get_expect_num_args(tc, pattern);
    unsigned num_d = get_expect_num_args(tc, dt);
    if (num_e > num_d)
        return false;
    for (unsigned i = 0; i < num_d - num_e; i++) {
        dt         = tc.whnf(dt).first;
        expr local = mk_local(ngen.next(), binding_domain(dt));
        dt         = instantiate(binding_body(dt), local);
    }
    try {
        unifier_config cfg;
        cfg.m_max_steps            = max_steps;
        cfg.m_kind                 = cheap ? unifier_kind::Cheap : unifier_kind::Liberal;
        cfg.m_ignore_context_check = true;
        auto r = unify(tc.env(), pattern, dt, tc.mk_ngen(), substitution(), cfg);
        return static_cast<bool>(r.pull());
    } catch (exception&) {
        return false;
    }
}