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feat(library/util): add mk_heq

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Leonardo de Moura 2014-12-18 15:53:23 -08:00
parent 1ca8723c54
commit a97bef7df2
1 changed files with 12 additions and 0 deletions
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12
src/library/util.cpp
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@ -171,6 +171,8 @@ static name * g_eq_name = nullptr;
static name * g_eq_refl_name = nullptr;
static name * g_eq_rec_name = nullptr;
static name * g_heq_name = nullptr;
static name * g_sigma_name = nullptr;
static name * g_sigma_mk_name = nullptr;
@ -193,6 +195,8 @@ void initialize_library_util() {
g_eq_refl_name = new name{"eq", "refl"};
g_eq_rec_name = new name{"eq", "rec"};
g_heq_name = new name("heq");
g_sigma_name = new name("sigma");
g_sigma_mk_name = new name{"sigma", "dpair"};
}
@ -213,6 +217,7 @@ void finalize_library_util() {
delete g_eq_name;
delete g_eq_refl_name;
delete g_eq_rec_name;
delete g_heq_name;
delete g_sigma_name;
delete g_sigma_mk_name;
}
@ -294,6 +299,13 @@ expr mk_eq(type_checker & tc, expr const & lhs, expr const & rhs) {
return mk_app(mk_constant(*g_eq_name, {lvl}), A, lhs, rhs);
}
expr mk_heq(type_checker & tc, expr const & lhs, expr const & rhs) {
expr A = tc.whnf(tc.infer(lhs).first).first;
expr B = tc.whnf(tc.infer(rhs).first).first;
level lvl = sort_level(tc.ensure_type(A).first);
return mk_app(mk_constant(*g_heq_name, {lvl}), A, lhs, B, rhs);
}
void mk_telescopic_eq(type_checker & tc, buffer<expr> const & t, buffer<expr> const & s, buffer<expr> & eqs) {
lean_assert(t.size() == s.size());
lean_assert(std::all_of(s.begin(), s.end(), is_local));