Function StringifyImpl

src/common/json.cpp:247–293

}

static void StringifyImpl(const Value& val, std::string& out, int depth) {
    static constexpr int MAX_DEPTH = 64;
    switch (val.type) {
        case Type::Null: out += "null"; break;
        case Type::Bool: out += val.boolVal ? "true" : "false"; break;
        case Type::Number: {
            if (val.numVal == (double)(int64_t)val.numVal &&
                val.numVal >= -1e15 && val.numVal <= 1e15) {
                char buf[32];
                snprintf(buf, sizeof(buf), "%lld", (long long)(int64_t)val.numVal);
                out += buf;
            } else {
                char buf[32];
                snprintf(buf, sizeof(buf), "%.17g", val.numVal);
                out += buf;
            }
            break;
        }
        case Type::String: EscapeStr(val.strVal, out); break;
        case Type::Array: {
            out += '[';
            if (depth < MAX_DEPTH) {
                for (size_t i = 0; i < val.arrVal.size(); ++i) {
                    if (i > 0) out += ',';
                    StringifyImpl(val.arrVal[i], out, depth + 1);
                }
            }
            out += ']';
            break;
        }
        case Type::Object: {
            out += '{';
            if (depth < MAX_DEPTH) {
                bool first = true;
                for (auto& [k, v] : val.objVal) {
                    if (!first) out += ',';
                    first = false;
                    EscapeStr(k, out);
                    out += ':';
                    StringifyImpl(v, out, depth + 1);
                }
            }
            out += '}';
            break;
        }
    }
}

std::string Stringify(const Value& val) {
    std::string out;