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fix(frontends/lean/builtin_cmds): allow token and metaclass to have the same name

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This commit is contained in:
Leonardo de Moura 2015-12-28 09:57:45 -08:00
parent 89a5d00714
commit 96bec8b4f9
2 changed files with 30 additions and 14 deletions
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43
src/frontends/lean/builtin_cmds.cpp
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@ -204,7 +204,7 @@ static bool is_next_metaclass_tk(parser const & p) {
return p.curr_is_token(get_lbracket_tk()) || p.curr_is_token(get_unfold_hints_bracket_tk());
}
static name parse_metaclass(parser & p) {
static optional<name> parse_metaclass(parser & p) {
if (p.curr_is_token(get_lbracket_tk())) {
p.next();
auto pos = p.pos();
@ -223,13 +223,21 @@ static name parse_metaclass(parser & p) {
p.check_token_next(get_rbracket_tk(), "invalid 'open' command, ']' expected");
if (!is_metaclass(n) && n != get_decls_tk() && n != get_declarations_tk())
throw parser_error(sstream() << "invalid metaclass name '[" << n << "]'", pos);
return n;
} else if (p.curr_is_token(get_unfold_hints_bracket_tk())) {
p.next();
return get_unfold_hints_tk();
} else {
return name();
return optional<name>(n);
} else if (p.curr() == scanner::token_kind::CommandKeyword) {
name v = p.get_token_info().value();
if (v.is_atomic() && v.is_string() && v.size() > 2 && v.get_string()[0] == '[' && v.get_string()[v.size()-1] == ']') {
auto pos = p.pos();
p.next();
std::string s(v.get_string() + 1);
s.pop_back();
name n(s);
if (!is_metaclass(n) && n != get_decls_tk() && n != get_declarations_tk())
throw parser_error(sstream() << "invalid metaclass name '[" << n << "]'", pos);
return optional<name>(n);
}
}
return optional<name>();
}
static void parse_metaclasses(parser & p, buffer<name> & r) {
@ -238,16 +246,23 @@ static void parse_metaclasses(parser & p, buffer<name> & r) {
buffer<name> tmp;
get_metaclasses(tmp);
tmp.push_back(get_decls_tk());
while (is_next_metaclass_tk(p)) {
name m = parse_metaclass(p);
tmp.erase_elem(m);
if (m == get_declarations_tk())
tmp.erase_elem(get_decls_tk());
while (true) {
if (optional<name> m = parse_metaclass(p)) {
tmp.erase_elem(*m);
if (*m == get_declarations_tk())
tmp.erase_elem(get_decls_tk());
} else {
break;
}
}
r.append(tmp);
} else {
while (is_next_metaclass_tk(p)) {
r.push_back(parse_metaclass(p));
while (true) {
if (optional<name> m = parse_metaclass(p)) {
r.push_back(*m);
} else {
break;
}
}
}
}

1
tests/lean/run/open_fwd_bug.lean Normal file
View file

@ -0,0 +1 @@
open - [forward] nat