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fix: disallow dotkey and inline table migration

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ToruNiina
2021-12-16 22:16:24 +09:00
parent 75e297eb47 cc1cc27613
commit 40777070ad
1 changed files with 31 additions and 3 deletions
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34
toml/parser.hpp
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@@ -1257,6 +1257,9 @@ std::string format_dotted_keys(InputIterator first, const InputIterator last)
// forward decl for is_valid_forward_table_definition
result<std::pair<std::vector<key>, region>, std::string>
parse_table_key(location& loc);
template<typename Value>
result<std::pair<typename Value::table_type, region>, std::string>
parse_inline_table(location& loc);
// The following toml file is allowed.
// ```toml
@@ -1282,16 +1285,41 @@ parse_table_key(location& loc);
// of the key. If the key region points deeper node, it would be allowed.
// Otherwise, the key points the same node. It would be rejected.
template<typename Value, typename Iterator>
bool is_valid_forward_table_definition(const Value& fwd,
bool is_valid_forward_table_definition(const Value& fwd, const Value& inserting,
Iterator key_first, Iterator key_curr, Iterator key_last)
{
// ------------------------------------------------------------------------
// check type of the value to be inserted/merged
std::string inserting_reg = "";
if(const auto ptr = detail::get_region(inserting))
{
inserting_reg = ptr->str();
}
location inserting_def("internal", std::move(inserting_reg));
if(const auto inlinetable = parse_inline_table<Value>(inserting_def))
{
// check if we are overwriting existing table.
// ```toml
// # NG
// a.b = 42
// a = {d = 3.14}
// ```
// Inserting an inline table to a existing super-table is not allowed in
// any case. If we found it, we can reject it without further checking.
return false;
}
// ------------------------------------------------------------------------
// check table defined before
std::string internal = "";
if(const auto ptr = detail::get_region(fwd))
{
internal = ptr->str();
}
location def("internal", std::move(internal));
if(const auto tabkeys = parse_table_key(def))
if(const auto tabkeys = parse_table_key(def)) // [table.key]
{
// table keys always contains all the nodes from the root.
const auto& tks = tabkeys.unwrap().first;
@@ -1481,7 +1509,7 @@ insert_nested_key(typename Value::table_type& root, const Value& v,
if(tab->at(k).is_table() && v.is_table())
{
if(!is_valid_forward_table_definition(
tab->at(k), first, iter, last))
tab->at(k), v, first, iter, last))
{
throw syntax_error(format_underline(concat_to_string(
"toml::insert_value: table (\"",