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fix(frontends/lean/inductive_cmd): temporary aliases must take explicit universes into account, fixes #215

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This commit is contained in:
Leonardo de Moura 2014-10-01 10:23:05 -07:00
parent 71077f5c89
commit 263b081e69
5 changed files with 52 additions and 28 deletions
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42
src/frontends/lean/inductive_cmd.cpp
View file

@ -92,11 +92,12 @@ struct inductive_cmd_fn {
name m_namespace; // current namespace
pos_info m_pos; // current position for reporting errors
bool m_first; // true if parsing the first inductive type in a mutually recursive inductive decl.
buffer<name> m_explict_levels;
buffer<name> m_explicit_levels;
buffer<name> m_levels;
bool m_using_explicit_levels; // true if the user is providing explicit universe levels
unsigned m_num_params; // number of parameters
level m_u; // temporary auxiliary global universe used for inferring the result universe of an inductive datatype declaration.
level m_u; // temporary auxiliary global universe used for inferring the result universe of
// an inductive datatype declaration.
bool m_infer_result_universe;
implicit_infer_map m_implicit_infer_map; // implicit argument inference mode
name_map<modifiers> m_modifiers;
@ -156,26 +157,26 @@ struct inductive_cmd_fn {
/** \brief Parse inductive declaration universe parameters.
If this is the first declaration in a mutually recursive block, then this method
stores the levels in m_explict_levels, and set m_using_explicit_levels to true (iff they were provided).
stores the levels in m_explicit_levels, and set m_using_explicit_levels to true (iff they were provided).
If this is not the first declaration, then this function just checks if the parsed parameters
match the ones in the first declaration (stored in \c m_explict_levels)
match the ones in the first declaration (stored in \c m_explicit_levels)
*/
void parse_inductive_univ_params() {
buffer<name> curr_ls_buffer;
if (parse_univ_params(m_p, curr_ls_buffer)) {
if (m_first) {
m_using_explicit_levels = true;
m_explict_levels.append(curr_ls_buffer);
m_explicit_levels.append(curr_ls_buffer);
} else if (!m_using_explicit_levels) {
throw_error("invalid mutually recursive declaration, "
"explicit universe levels were not provided for previous inductive types in this declaration");
} else if (curr_ls_buffer.size() != m_explict_levels.size()) {
} else if (curr_ls_buffer.size() != m_explicit_levels.size()) {
throw_error("invalid mutually recursive declaration, "
"all inductive types must have the same number of universe paramaters");
} else {
for (unsigned i = 0; i < m_explict_levels.size(); i++) {
if (curr_ls_buffer[i] != m_explict_levels[i])
for (unsigned i = 0; i < m_explicit_levels.size(); i++) {
if (curr_ls_buffer[i] != m_explicit_levels[i])
throw_error("invalid mutually recursive inductive declaration, "
"all inductive types must have the same universe paramaters");
}
@ -215,7 +216,8 @@ struct inductive_cmd_fn {
m_num_params = ps.size();
} else if (m_num_params != ps.size()) {
// mutually recursive declaration checks
throw_error("invalid mutually recursive inductive declaration, all inductive types must have the same number of arguments");
throw_error("invalid mutually recursive inductive declaration, "
"all inductive types must have the same number of arguments");
}
return type;
}
@ -286,7 +288,8 @@ struct inductive_cmd_fn {
if (!is_nil(d_lvls) || !is_nil(first_d_lvls))
throw_error("invalid mutually recursive inductive declaration, "
"all declarations must have the same number of arguments "
"(this is error is probably due to inferred implicit parameters, provide all parameters explicitly to fix the problem");
"(this is error is probably due to inferred implicit parameters, "
"provide all parameters explicitly to fix the problem");
}
/** \brief Add the parameters of the inductive decl type to the local scoped.
@ -294,7 +297,8 @@ struct inductive_cmd_fn {
*/
void add_params_to_local_scope(expr d_type, buffer<expr> & params) {
for (unsigned i = 0; i < m_num_params; i++) {
expr l = mk_local(m_p.mk_fresh_name(), binding_name(d_type), mk_as_is(binding_domain(d_type)), binding_info(d_type));
expr l = mk_local(m_p.mk_fresh_name(), binding_name(d_type), mk_as_is(binding_domain(d_type)),
binding_info(d_type));
m_p.add_local(l);
params.push_back(l);
d_type = instantiate(binding_body(d_type), l);
@ -351,7 +355,10 @@ struct inductive_cmd_fn {
}
level_param_names d_lvls;
std::tie(d_type, d_lvls) = elaborate_inductive_type(d_type);
if (!m_first) {
if (m_first) {
m_levels.append(m_explicit_levels);
for (auto l : d_lvls) m_levels.push_back(l);
} else {
lean_assert(first_d_type);
lean_assert(first_d_lvls);
check_params(d_type, *first_d_type);
@ -360,7 +367,8 @@ struct inductive_cmd_fn {
if (empty_type) {
decls.push_back(inductive_decl(d_name, d_type, list<intro_rule>()));
} else {
expr d_const = mk_constant(d_name);
expr d_const = mk_constant(d_name, param_names_to_levels(to_list(m_explicit_levels.begin(),
m_explicit_levels.end())));
m_p.add_local_expr(d_short_name, d_const);
buffer<expr> params;
add_params_to_local_scope(d_type, params);
@ -368,8 +376,6 @@ struct inductive_cmd_fn {
decls.push_back(inductive_decl(d_name, d_type, d_intro_rules));
}
if (!m_p.curr_is_token(get_with_tk())) {
m_levels.append(m_explict_levels);
for (auto l : d_lvls) m_levels.push_back(l);
break;
}
m_p.next();
@ -484,7 +490,8 @@ struct inductive_cmd_fn {
if (l == m_u) {
// ignore, this is the auxiliary level
} else if (occurs(m_u, l)) {
throw exception("failed to infer inductive datatype resultant universe, provide the universe levels explicitly");
throw exception("failed to infer inductive datatype resultant universe, "
"provide the universe levels explicitly");
} else if (std::find(r_lvls.begin(), r_lvls.end(), l) == r_lvls.end()) {
r_lvls.push_back(l);
}
@ -571,7 +578,8 @@ struct inductive_cmd_fn {
}
/** \brief Create an alias for the fully qualified name \c full_id. */
environment create_alias(environment env, bool composite, name const & full_id, levels const & section_levels, buffer<expr> const & section_params) {
environment create_alias(environment env, bool composite, name const & full_id,
levels const & section_levels, buffer<expr> const & section_params) {
name id;
if (composite)
id = name(name(full_id.get_prefix().get_string()), full_id.get_string());

11
src/frontends/lean/parser.cpp
View file

@ -335,15 +335,8 @@ expr parser::propagate_levels(expr const & e, levels const & ls) {
return e;
} else {
return replace(e, [&](expr const & e) {
if (is_constant(e)) {
auto it = m_env.find(const_name(e));
if (it) {
level_param_names const & univ_ps = it->get_univ_params();
levels const & old_ls = const_levels(e);
if (length(old_ls) + length(ls) <= length(univ_ps))
return some_expr(update_constant(e, append(old_ls, ls)));
}
}
if (is_constant(e))
return some_expr(update_constant(e, ls));
return none_expr();
});
}

2
tests/lean/run/indbug2.lean
View file

@ -1,3 +1,5 @@
set_option pp.implicit true
set_option pp.universes true
section
parameter {A : Type}
definition foo : A → A → Type := (λ x y, Type)

22
tests/lean/run/one.lean Normal file
View file

@ -0,0 +1,22 @@
inductive one.{l} : Type.{max 1 l} :=
unit : one.{l}
set_option pp.universes true
check one
inductive one2.{l} : Type.{max 1 l} :=
unit : one2
check one2
section foo
universe l2
parameter A : Type.{l2}
inductive wrapper.{l} : Type.{max 1 l l2} :=
mk : A → wrapper.{l2 l}
check wrapper
end foo
check wrapper

3
tests/lean/run/t4.lean
View file

@ -7,7 +7,6 @@ variable N : Type.{1}
section
parameter A : Type
definition g (a : A) (B : Type) : A := a
check g.{2}
check g.{_ 2}
end
check g.{2 3}