std::pair of structs fails round trip

[RazielXYZ]

Tested on msvc, glaze 3.1.9, 3.2.1 and 3.2.5

Given code such as

#include <iostream>
#include "glaze-3.2.5/include/glaze/glaze.hpp"

struct FirstStruct {
    int64_t MyVar {};
};

struct SecondStruct {
    int64_t OtherVar{};
};

int main() {

    std::pair<FirstStruct, SecondStruct> testPair{ {1}, {2} };
    std::string buffer;
    auto ec = glz::write_json(testPair, buffer);
    if (!ec) {
        std::cout << buffer << std::endl;
    } else {
        std::cout << "Error: " << glz::format_error(ec) << std::endl;
    }

    std::pair<FirstStruct, SecondStruct> testPair2;
    auto testPairDeserRes = glz::read_json(testPair2, buffer);
    if (!testPairDeserRes) {
        std::cout << testPair2.first.MyVar << ":" << testPair2.second.OtherVar << std::endl;
    } else {
        std::cout << "Error: " << glz::format_error(testPairDeserRes, buffer) << std::endl;
    }

    return 0;
}

The output is

{"{\"MyVar\":1}":{"OtherVar":2}}
Error: 1:17: expected_quote
   {"{\"MyVar\":1}":{"OtherVar":2}}
                   ^

If using a pair of fundamental types, the round trip succeeds. It looks like this is treated as a map, and the "key" is quoted when serializing, but the deserialization also expects the value to be quoted?

[stephenberry]

Yes, this is an active issue here #1000, but thanks for bringing more attention to it.

[RazielXYZ]

I see, I wasn't sure if it was related since that mentioned arrays specifically. Thanks!