To create a json object by reading a JSON file: #include <fstream> #include <nlohmann/json.hpp> using json = nlohmann::json; // ... std::ifstream f("example.json"); json data = json::parse(f); Creating json objects from JSON literals Assume you want to create hard-code this ...
Description Unlikejsonandordered_json, the default template arguments forordered_mapis not defined injson_fwd.hpp, so when compile failed with template arguments mismatch when usejson_fwd.hppwithordered_map Reproduction steps compile the below example code Expected vs. actual results the below code e...
JSON for Modern C++ (即为 nlohmann_json)是一个由德国大牛 nlohmann 编写的在 C++ 下使用的 JSON 库; json-for-modern-cpp 只有一个 json.hpp 文件, 但是最低需要 C++11 GCC 4.8.0 以上编译器才能使用;
You can further use fileinclude/nlohmann/json_fwd.hppfor forward-declarations. The installation of json_fwd.hpp (as part of cmake's install step), can be achieved by setting-DJSON_MultipleHeaders=ON. CMake You can also use thenlohmann_json::nlohmann_jsoninterface target in CMake. This tar...
json是basic_json的别名,因此您需要在声明basic_json之前转发声明json。如果您在json_fwd.hpp中向上滚动一点,您将看到basic_json的大量向前声明。因此,如果您想在头文件中使用nlohmann::json &,可以包含json_fwd.hpp。 收藏分享票数4 EN 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持 原文...
detail/string_escape.hpp /usr/include/nlohmann/detail/value_t.hpp /usr/include/nlohmann/json.hpp /usr/include/nlohmann/json_fwd.hpp /usr/include/nlohmann/ordered_map.hpp /usr/include/nlohmann/thirdparty/hedley/hedley.hpp /usr/include/nlohmann/thirdparty/hedley/hedley_undef.hpp /usr/lib/cmake/...
：json&作为参数的函数：如果我们看一下源代码，我们可以看到json是在json_fwd. hpp中定义的。
/usr/include/nlohmann/adl_serializer.hpp /usr/include/nlohmann/byte_container_with_subtype.hpp /usr/include/nlohmann/detail/abi_macros.hpp /usr/include/nlohmann/detail/conversions/from_json.hpp /usr/include/nlohmann/detail/conversions/to_chars.hpp /usr/include/nlohmann/detail/conversions/to_json.hpp...
Description json_fwd.hpp no longer works. When using it in a header there is an "incomplete class" error in the corresponding code file. I have already figured out why this happens: The basic_json template differs between json_fwd.hpp an...
#ifndefINCLUDE_NLOHMANN_JSON_FWD_HPP_ #defineINCLUDE_NLOHMANN_JSON_FWD_HPP_ #include<cstdint>//int64_t, uint64_t #include//map #include<memory>//allocator #include<string>//string #include<vector>//vector //#include <nlohmann/detail/abi_macros.hpp> //__...