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Iterator over interpreter::Struct

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This commit is contained in:
Olivier Goffart 2021-03-18 15:07:38 +01:00
parent a3d0f3155d
commit 8a14c4fa25
2 changed files with 68 additions and 6 deletions
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59
api/sixtyfps-cpp/include/sixtyfps_interpreter.h
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@ -62,16 +62,63 @@ public:
Struct(InputIterator begin,
InputIterator end); // Creates
// Value::Struct
#endif
// FIXME: this probably miss a lot of iterator api
struct iterator
{
//... iterator API to key/value pairs
}
using value_type = std::pair<std::string_view, const Value &>;
private:
cbindgen_private::StructIteratorOpaque inner;
const Value *v = nullptr;
std::string_view k;
friend Struct;
explicit iterator(cbindgen_private::StructIteratorOpaque inner) : inner(inner) {
next();
}
// construct a end iterator
iterator() = default;
void next() {
auto next = cbindgen_private::sixtyfps_interpreter_struct_iterator_next(&inner);
v = reinterpret_cast<const Value *>(next.v);
k = std::string_view(reinterpret_cast<char *>(next.k.ptr), next.k.len);
if (!v) {
cbindgen_private::sixtyfps_interpreter_struct_iterator_destructor(&inner);
}
}
public:
~iterator() {
if (v) {
cbindgen_private::sixtyfps_interpreter_struct_iterator_destructor(&inner);
}
}
// FIXME i believe iterator are supposed to be copy constructible
iterator(const iterator &) = delete;
iterator &operator=(const iterator &) = delete;
iterator(iterator &&) = default;
iterator &operator=(iterator &&) = default;
iterator &operator++() {
if (v)
next();
return *this;
}
value_type operator*() const {
return {k, *v};
}
friend bool operator==(const iterator&a, const iterator&b) {
return a.v == b.v;
}
friend bool operator!=(const iterator&a, const iterator&b) {
return a.v != b.v;
}
};
iterator
begin() const;
iterator end() const;
#endif
iterator begin() const {
return iterator(cbindgen_private::sixtyfps_interpreter_struct_make_iter(&inner));
}
iterator end() const {
return iterator();
}
inline std::optional<Value> get_field(std::string_view name) const;
inline void set_field(std::string_view name, const Value &value);