Annotations draft
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9c5368b69b
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3c76819687
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@ -27,4 +27,5 @@ TEST(BinaryReader, ReadSamples) {
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BinaryReader<> r(f, &GenericEmbedded::wrap);
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auto v = r.next();
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ASSERT_TRUE(v);
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BinaryWriter(cerr) << *v;
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}
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@ -79,7 +79,6 @@ namespace Preserves {
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}
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boost::optional<Value<T>> _next(bool& end_sentinel) {
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more:
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end_sentinel = false;
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auto tag = BinaryTag(i.get());
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// std::cout << "tag " << std::hex << int(tag) << " pos " << i.tellg() - 1 << std::endl;
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@ -90,9 +89,11 @@ namespace Preserves {
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case BinaryTag::Float: return next_float().map(Value<T>::from_float);
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case BinaryTag::Double: return next_double().map(Value<T>::from_double);
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case BinaryTag::End: end_sentinel = true; return boost::none;
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case BinaryTag::Annotation:
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if (!next()) return boost::none;
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goto more;
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case BinaryTag::Annotation: return next().flat_map([&](Value<T> const& ann) -> boost::optional<Value<T>> {
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return next().flat_map([&](Value<T> const& v) -> boost::optional<Value<T>> {
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return v.annotate(ann);
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});
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});
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case BinaryTag::Embedded:
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return BinaryReader<GenericEmbedded>(i, &GenericEmbedded::wrap)
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.next().map(decodeEmbedded).map(Value<T>::from_embedded);
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@ -269,6 +269,88 @@ namespace Preserves {
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}
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};
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template <typename T>
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class AnnotatedValue: public ValueImpl<T> {
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Value<T> underlying;
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std::vector<Value<T>> anns;
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friend class ValueImpl<T>;
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protected:
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Value<T> internal_annotate(std::shared_ptr<ValueImpl<T>> const& self, Value<T> const &ann) {
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if (self.use_count() == 1) {
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anns.push_back(ann);
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return self;
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} else {
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auto a = std::make_shared<AnnotatedValue<T>>(underlying);
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a->anns.insert(a->anns.end(), anns.begin(), anns.end());
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a->anns.push_back(ann);
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return Value<T>(a);
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}
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}
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public:
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AnnotatedValue(Value<T> const& v) : underlying(v) {}
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ValueKind value_kind() const override { return underlying.value_kind(); }
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bool is_mutable() const override { return underlying.is_mutable(); }
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boost::optional<bool> as_bool() const override { return underlying.as_bool(); }
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boost::optional<float> as_float() const override { return underlying.as_float(); }
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boost::optional<double> as_double() const override { return underlying.as_double(); }
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boost::optional<uint64_t> as_unsigned() const override { return underlying.as_unsigned(); }
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boost::optional<int64_t> as_signed() const override { return underlying.as_signed(); }
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boost::optional<std::vector<uint8_t> const&> as_bignum() const override { return underlying.as_bignum(); }
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boost::optional<std::string const&> as_string() const override { return underlying.as_string(); }
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boost::optional<std::vector<uint8_t> const&> as_bytes() const override { return underlying.as_bytes(); }
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boost::optional<std::string const&> as_symbol() const override { return underlying.as_symbol(); }
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boost::optional<Record<T> const&> as_record() const override { return underlying.as_record(); }
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boost::optional<std::vector<Value<T>> const&> as_sequence() const override { return underlying.as_sequence(); }
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boost::optional<std::set<Value<T>> const&> as_set() const override { return underlying.as_set(); }
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boost::optional<std::map<Value<T>,Value<T>> const&> as_dictionary() const override { return underlying.as_dictionary(); }
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boost::optional<std::shared_ptr<T>> as_embedded() const override { return underlying.as_embedded(); }
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boost::optional<Value<T>> label() const override { return underlying.label(); }
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size_t size() const override { return underlying.size(); }
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bool contains(Value<T> const& key) const override { return underlying.contains(key); }
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boost::optional<Value<T>> get(Value<T> const& key) const override { return underlying.get(key); }
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boost::optional<Value<T>> get(size_t index) const override { return underlying.get(index); }
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bool add(Value<T> const& item) override {
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return underlying->add(item);
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}
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bool set(Value<T> const& key, Value<T> const& value) override {
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return underlying->set(key, value);
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}
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bool set(size_t index, Value<T> const& value) override {
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return underlying->set(index, value);
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}
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bool erase(Value<T> const& key) override {
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return underlying->erase(key);
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}
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boost::optional<std::vector<Value<T>> const&> annotations() const override {
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return anns;
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}
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BinaryWriter& write(BinaryWriter &w) const override {
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for (auto& v : anns) { w << BinaryTag::Annotation << v; }
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return w << underlying;
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}
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};
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template <typename T>
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Value<T> Value<T>::annotate(Value<T> const& ann) const {
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return p->internal_annotate(p, ann);
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}
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template <typename T>
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Value<T> ValueImpl<T>::internal_annotate(std::shared_ptr<ValueImpl<T>> const& self, Value<T> const &ann) {
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auto a = std::make_shared<AnnotatedValue<T>>(Value<T>(self));
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a->anns.push_back(ann);
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return Value<T>(a);
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}
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template <typename T>
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Value<T> Value<T>::from_bool(bool b)
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{
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@ -148,6 +148,9 @@ namespace Preserves {
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boost::optional<std::shared_ptr<T>> as_embedded() const;
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std::shared_ptr<T> to_embedded() const { return as_embedded().value(); }
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Value annotate(Value const& ann) const;
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boost::optional<std::vector<Value> const&> annotations() const;
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boost::optional<Value> label() const;
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size_t size() const;
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bool contains(Value const& key) const;
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@ -161,6 +164,10 @@ namespace Preserves {
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template <typename T>
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class ValueImpl {
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protected:
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virtual Value<T> internal_annotate(std::shared_ptr<ValueImpl<T>> const& self, Value<T> const& ann);
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friend class Value<T>;
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public:
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virtual ~ValueImpl() {}
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@ -201,6 +208,8 @@ namespace Preserves {
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throw std::runtime_error("Cannot erase item in Preserves value");
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}
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virtual boost::optional<std::vector<Value<T>> const&> annotations() const { return boost::none; }
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virtual BinaryWriter& write(BinaryWriter& w) const = 0;
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};
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@ -227,6 +236,9 @@ namespace Preserves {
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PRESERVES_DELEGATE_CAST(std::shared_ptr<T>, as_embedded);
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#undef PRESERVES_DELEGATE_CAST
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template <typename T> boost::optional<Value<T>> Value<T>::label() const { return p->label(); }
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template <typename T> bool Value<T>::contains(Value const& key) const { return p->contains(key); }
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template <typename T> boost::optional<Value<T>> Value<T>::get(Value<T> const& key) const { return p->get(key); }
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template <typename T> boost::optional<Value<T>> Value<T>::get(size_t index) const { return p->get(index); }
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template <typename T> size_t Value<T>::size() const { return p->size(); }
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