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[struct_json] support user-defined serialize/deserialize
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@poor-circle
poor-circle committed Mar 4, 2024
1 parent 14d1323 commit b4a4938
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Showing 6 changed files with 153 additions and 82 deletions.
83 changes: 45 additions & 38 deletions include/ylt/thirdparty/iguana/json_reader.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11,13 +11,13 @@ namespace detail {

template <typename U, typename It,
std::enable_if_t<sequence_container_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end);
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end);

template <typename U, typename It, std::enable_if_t<smart_ptr_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end);
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end);

template <typename U, typename It, std::enable_if_t<refletable_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
from_json(value, it, end);
}

Expand Down Expand Up @@ -61,7 +61,7 @@ IGUANA_INLINE void parse_escape(U &value, It &&it, It &&end) {
}

template <typename U, typename It, std::enable_if_t<num_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
skip_ws(it, end);
if constexpr (contiguous_iterator<std::decay_t<It>>) {
const auto size = std::distance(it, end);
Expand Down Expand Up @@ -89,7 +89,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
}

template <typename U, typename It, std::enable_if_t<numeric_str_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
skip_ws(it, end);
auto start = it;
while (it != end && is_numeric(*it)) {
Expand All @@ -101,7 +101,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {

template <bool skip = false, typename U, typename It,
std::enable_if_t<char_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
if constexpr (!skip) {
skip_ws(it, end);
match<'"'>(it, end);
Expand Down Expand Up @@ -140,7 +140,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
}

template <typename U, typename It, std::enable_if_t<bool_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &&value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &&value, It &&it, It &&end) {
skip_ws(it, end);

if (it < end)
Expand All @@ -166,7 +166,7 @@ IGUANA_INLINE void parse_item(U &&value, It &&it, It &&end) {

template <bool skip = false, typename U, typename It,
std::enable_if_t<string_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
if constexpr (!skip) {
skip_ws(it, end);
match<'"'>(it, end);
Expand Down Expand Up @@ -208,7 +208,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {

template <bool skip = false, typename U, typename It,
std::enable_if_t<string_view_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
static_assert(contiguous_iterator<std::decay_t<It>>, "must be contiguous");
if constexpr (!skip) {
skip_ws(it, end);
Expand All @@ -229,16 +229,16 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
}

template <typename U, typename It, std::enable_if_t<enum_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
static constexpr auto str_to_enum = get_enum_map<true, std::decay_t<U>>();
if constexpr (bool_v<decltype(str_to_enum)>) {
// not defined a specialization template
using T = std::underlying_type_t<std::decay_t<U>>;
parse_item(reinterpret_cast<T &>(value), it, end);
from_json_impl(reinterpret_cast<T &>(value), it, end);
}
else {
std::string_view enum_names;
parse_item(enum_names, it, end);
from_json_impl(enum_names, it, end);
auto it = str_to_enum.find(enum_names);
if (it != str_to_enum.end())
IGUANA_LIKELY { value = it->second; }
Expand All @@ -250,7 +250,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
}

template <typename U, typename It, std::enable_if_t<fixed_array_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
using T = std::remove_reference_t<U>;
constexpr auto n = sizeof(T) / sizeof(decltype(std::declval<T>()[0]));
skip_ws(it, end);
Expand All @@ -262,7 +262,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
auto value_it = std::begin(value);
for (size_t i = 0; i < n; ++i) {
if (*it != '"')
IGUANA_LIKELY { parse_item<true>(*value_it++, it, end); }
IGUANA_LIKELY { from_json_impl<true>(*value_it++, it, end); }
}
match<'"'>(it, end);
return;
Expand All @@ -280,7 +280,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
}
auto value_it = std::begin(value);
for (size_t i = 0; i < n; ++i) {
parse_item(*value_it++, it, end);
from_json_impl(*value_it++, it, end);
skip_ws(it, end);
if (it == end) {
throw std::runtime_error("Unexpected end");
Expand All @@ -301,7 +301,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {

template <typename U, typename It,
std::enable_if_t<sequence_container_v<U>, int>>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
value.clear();
skip_ws(it, end);

Expand All @@ -316,7 +316,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
if (i > 0)
IGUANA_LIKELY { match<','>(it, end); }

parse_item(value.emplace_back(), it, end);
from_json_impl(value.emplace_back(), it, end);
skip_ws(it, end);
}
throw std::runtime_error("Expected ]");
Expand All @@ -337,7 +337,7 @@ IGUANA_INLINE auto get_key(It &&it, It &&end) {
// compile time versions of keys
it = start;
static thread_local std::string static_key{};
detail::parse_item<true>(static_key, it, end);
detail::from_json_impl<true>(static_key, it, end);
return std::string_view(static_key);
}
else
Expand All @@ -352,14 +352,14 @@ IGUANA_INLINE auto get_key(It &&it, It &&end) {
}
else {
static thread_local std::string static_key{};
detail::parse_item(static_key, it, end);
detail::from_json_impl(static_key, it, end);
return std::string_view(static_key);
}
}

template <typename U, typename It,
std::enable_if_t<map_container_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
using T = std::remove_reference_t<U>;
using key_type = typename T::key_type;
skip_ws(it, end);
Expand All @@ -384,19 +384,19 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
match<':'>(it, end);

if constexpr (string_v<key_type> || string_view_v<key_type>) {
parse_item(value[key_type(key)], it, end);
from_json_impl(value[key_type(key)], it, end);
}
else {
static thread_local key_type key_value{};
parse_item(key_value, key.begin(), key.end());
parse_item(value[key_value], it, end);
from_json_impl(key_value, key.begin(), key.end());
from_json_impl(value[key_value], it, end);
}
skip_ws(it, end);
}
}

template <typename U, typename It, std::enable_if_t<tuple_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
skip_ws(it, end);
match<'['>(it, end);
skip_ws(it, end);
Expand All @@ -410,15 +410,15 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
match<','>(it, end);
skip_ws(it, end);
}
parse_item(v, it, end);
from_json_impl(v, it, end);
skip_ws(it, end);
});

match<']'>(it, end);
}

template <typename U, typename It, std::enable_if_t<optional_v<U>, int> = 0>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
skip_ws(it, end);
if (it < end && *it == '"')
IGUANA_LIKELY { ++it; }
Expand All @@ -439,17 +439,17 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
using value_type = typename T::value_type;
value_type t;
if constexpr (string_v<value_type> || string_view_v<value_type>) {
parse_item<true>(t, it, end);
from_json_impl<true>(t, it, end);
}
else {
parse_item(t, it, end);
from_json_impl(t, it, end);
}
value = std::move(t);
}
}

template <typename U, typename It, std::enable_if_t<smart_ptr_v<U>, int>>
IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
IGUANA_INLINE void from_json_impl(U &value, It &&it, It &&end) {
skip_ws(it, end);
if (it == end)
IGUANA_UNLIKELY { throw std::runtime_error("Unexexpected eof"); }
Expand All @@ -465,7 +465,7 @@ IGUANA_INLINE void parse_item(U &value, It &&it, It &&end) {
else {
value = std::make_shared<value_type>();
}
parse_item(*value, it, end);
from_json_impl(*value, it, end);
}
}

Expand Down Expand Up @@ -522,7 +522,10 @@ IGUANA_INLINE void from_json(T &value, It &&it, It &&end) {
IGUANA_UNLIKELY { return; }
skip_ws(it, end);
match<':'>(it, end);
detail::parse_item(value.*member_ptr, it, end);
{
using namespace detail;
from_json_impl(value.*member_ptr, it, end);
}

skip_ws(it, end);
if (*it == '}')
Expand Down Expand Up @@ -551,7 +554,8 @@ IGUANA_INLINE void from_json(T &value, It &&it, It &&end) {
[&](auto &&member_ptr) IGUANA__INLINE_LAMBDA {
using V = std::decay_t<decltype(member_ptr)>;
if constexpr (std::is_member_pointer_v<V>) {
detail::parse_item(value.*member_ptr, it, end);
using namespace detail;
from_json_impl(value.*member_ptr, it, end);
}
else {
static_assert(!sizeof(V), "type not supported");
Expand Down Expand Up @@ -583,7 +587,8 @@ IGUANA_INLINE void from_json(T &value, It &&it, It &&end) {
template <typename T, typename It,
std::enable_if_t<non_refletable_v<T>, int> = 0>
IGUANA_INLINE void from_json(T &value, It &&it, It &&end) {
detail::parse_item(value, it, end);
using namespace detail;
from_json_impl(value, it, end);
}

template <typename T, typename It>
Expand Down Expand Up @@ -681,7 +686,8 @@ inline void parse(jobject &result, It &&it, It &&end) {
if (it == end)
IGUANA_UNLIKELY { throw std::runtime_error("Expected }"); }
std::string key;
detail::parse_item(key, it, end);
using namespace detail;
from_json_impl(key, it, end);

auto emplaced = result.try_emplace(key);
if (!emplaced.second)
Expand All @@ -703,6 +709,7 @@ inline void parse(jobject &result, It &&it, It &&end) {

template <bool Is_view, typename It>
inline void parse(jvalue &result, It &&it, It &&end) {
using namespace detail;
skip_ws(it, end);
switch (*it) {
case 'n':
Expand All @@ -713,7 +720,7 @@ inline void parse(jvalue &result, It &&it, It &&end) {

case 'f':
case 't':
detail::parse_item(result.template emplace<bool>(), it, end);
from_json_impl(result.template emplace<bool>(), it, end);
break;
case '0':
case '1':
Expand All @@ -727,7 +734,7 @@ inline void parse(jvalue &result, It &&it, It &&end) {
case '9':
case '-': {
double d{};
detail::parse_item(d, it, end);
from_json_impl(d, it, end);
if (static_cast<int>(d) == d)
result.emplace<int>(d);
else
Expand All @@ -737,11 +744,11 @@ inline void parse(jvalue &result, It &&it, It &&end) {
case '"':
if constexpr (Is_view) {
result.template emplace<std::string_view>();
detail::parse_item(std::get<std::string_view>(result), it, end);
from_json_impl(std::get<std::string_view>(result), it, end);
}
else {
result.template emplace<std::string>();
detail::parse_item(std::get<std::string>(result), it, end);
from_json_impl(std::get<std::string>(result), it, end);
}
break;
case '[':
Expand Down
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