| #pragma once |
| |
| // This file contains all internal macro definitions |
| // You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them |
| |
| // exclude unsupported compilers |
| #if defined(__clang__) |
| #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400 |
| #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers" |
| #endif |
| #elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER)) |
| #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900 |
| #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers" |
| #endif |
| #endif |
| |
| // disable float-equal warnings on GCC/clang |
| #if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wfloat-equal" |
| #endif |
| |
| // disable documentation warnings on clang |
| #if defined(__clang__) |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wdocumentation" |
| #endif |
| |
| // allow for portable deprecation warnings |
| #if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__) |
| #define JSON_DEPRECATED __attribute__((deprecated)) |
| #elif defined(_MSC_VER) |
| #define JSON_DEPRECATED __declspec(deprecated) |
| #else |
| #define JSON_DEPRECATED |
| #endif |
| |
| // allow to disable exceptions |
| #if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)) && !defined(JSON_NOEXCEPTION) |
| #define JSON_THROW(exception) throw exception |
| #define JSON_TRY try |
| #define JSON_CATCH(exception) catch(exception) |
| #else |
| #define JSON_THROW(exception) std::abort() |
| #define JSON_TRY if(true) |
| #define JSON_CATCH(exception) if(false) |
| #endif |
| |
| // override exception macros |
| #if defined(JSON_THROW_USER) |
| #undef JSON_THROW |
| #define JSON_THROW JSON_THROW_USER |
| #endif |
| #if defined(JSON_TRY_USER) |
| #undef JSON_TRY |
| #define JSON_TRY JSON_TRY_USER |
| #endif |
| #if defined(JSON_CATCH_USER) |
| #undef JSON_CATCH |
| #define JSON_CATCH JSON_CATCH_USER |
| #endif |
| |
| // manual branch prediction |
| #if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__) |
| #define JSON_LIKELY(x) __builtin_expect(!!(x), 1) |
| #define JSON_UNLIKELY(x) __builtin_expect(!!(x), 0) |
| #else |
| #define JSON_LIKELY(x) x |
| #define JSON_UNLIKELY(x) x |
| #endif |
| |
| // C++ language standard detection |
| #if (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464 |
| #define JSON_HAS_CPP_17 |
| #define JSON_HAS_CPP_14 |
| #elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1) |
| #define JSON_HAS_CPP_14 |
| #endif |
| |
| // Ugly macros to avoid uglier copy-paste when specializing basic_json. They |
| // may be removed in the future once the class is split. |
| |
| #define NLOHMANN_BASIC_JSON_TPL_DECLARATION \ |
| template<template<typename, typename, typename...> class ObjectType, \ |
| template<typename, typename...> class ArrayType, \ |
| class StringType, class BooleanType, class NumberIntegerType, \ |
| class NumberUnsignedType, class NumberFloatType, \ |
| template<typename> class AllocatorType, \ |
| template<typename, typename = void> class JSONSerializer> |
| |
| #define NLOHMANN_BASIC_JSON_TPL \ |
| basic_json<ObjectType, ArrayType, StringType, BooleanType, \ |
| NumberIntegerType, NumberUnsignedType, NumberFloatType, \ |
| AllocatorType, JSONSerializer> |
| |
| /*! |
| @brief Helper to determine whether there's a key_type for T. |
| |
| This helper is used to tell associative containers apart from other containers |
| such as sequence containers. For instance, `std::map` passes the test as it |
| contains a `mapped_type`, whereas `std::vector` fails the test. |
| |
| @sa http://stackoverflow.com/a/7728728/266378 |
| @since version 1.0.0, overworked in version 2.0.6 |
| */ |
| #define NLOHMANN_JSON_HAS_HELPER(type) \ |
| template<typename T> struct has_##type { \ |
| private: \ |
| template<typename U, typename = typename U::type> \ |
| static int detect(U &&); \ |
| static void detect(...); \ |
| public: \ |
| static constexpr bool value = \ |
| std::is_integral<decltype(detect(std::declval<T>()))>::value; \ |
| } |