jsoncons warnings on gcc 7

gistfile1.txt

In file included from ext/tracy/include/tracy/write_to_file.hpp:9:0,
                 from ext/tracy/include/tracy/tracer.hpp:19,
                 from ext/tracy/include/tracy/tracy.hpp:10,
                 from ext/tracy/include/tracy/logger.hpp:6,
                 from ext/gate-common/include/gate/sbe_misc.hpp:6,
                 from src/test_replace.cpp:16:
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘jsoncons::value_type jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::type_id() const [with CharT = char; JsonTraits = jsoncons::json_traits<char>; Allocator = std::allocator<char>]’:
ext/jsoncons/src/jsoncons/json.hpp:3047:9:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::json_type jsoncons::basic_json<CharT, JsonTraits, Allocator>::get(jsoncons::basic_json<CharT, JsonTraits, Allocator>::string_view_type, T&&) const [with T = const char (&)[4]; CharT = char; JsonTraits = jsoncons::json_traits<char>; Allocator = std::allocator<char>; jsoncons::basic_json<CharT, JsonTraits, Allocator>::json_type = jsoncons::basic_json<char, jsoncons::json_traits<char>, std::allocator<char> >; jsoncons::basic_json<CharT, JsonTraits, Allocator>::string_view_type = jsoncons::Basic_string_view_<char, std::char_traits<char> >; typename JsonTraits::char_traits_type = std::char_traits<char>]’
ext/tracy/include/tracy/write_to_stream.hpp:101:50:   required from here
ext/jsoncons/src/jsoncons/json.hpp:756:20: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
             return reinterpret_cast<const base_data*>(&data_)->type_id_;
                    ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = char; JsonTraits = jsoncons::json_traits<char>; Allocator = std::allocator<char>]’:
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = char; JsonTraits = jsoncons::json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = char; JsonTraits = jsoncons::json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:3988:38:   required from here
ext/jsoncons/src/jsoncons/json.hpp:686:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<string_data*>(&data_)->~string_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:689:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<object_data*>(&data_)->~object_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:692:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<array_data*>(&data_)->~array_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’:
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:3994:39:   required from here
ext/jsoncons/src/jsoncons/json.hpp:686:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<string_data*>(&data_)->~string_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:689:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<object_data*>(&data_)->~object_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:692:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<array_data*>(&data_)->~array_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’:
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:4000:39:   required from here
ext/jsoncons/src/jsoncons/json.hpp:686:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<string_data*>(&data_)->~string_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:689:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<object_data*>(&data_)->~object_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:692:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<array_data*>(&data_)->~array_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’:
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:4006:40:   required from here
ext/jsoncons/src/jsoncons/json.hpp:686:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<string_data*>(&data_)->~string_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:689:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<object_data*>(&data_)->~object_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp:692:17: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
                 reinterpret_cast<array_data*>(&data_)->~array_data();
                 ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘jsoncons::value_type jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::type_id() const [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’:
ext/jsoncons/src/jsoncons/json.hpp:683:28:   required from ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = wchar_t; JsonTraits = jsoncons::json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:3994:39:   required from here
ext/jsoncons/src/jsoncons/json.hpp:756:20: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
             return reinterpret_cast<const base_data*>(&data_)->type_id_;
                    ^~~~~~~~~~~~~~~~
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘jsoncons::value_type jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::type_id() const [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’:
ext/jsoncons/src/jsoncons/json.hpp:683:28:   required from ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = char; JsonTraits = jsoncons::o_json_traits<char>; Allocator = std::allocator<char>]’
ext/jsoncons/src/jsoncons/json.hpp:4000:39:   required from here
ext/jsoncons/src/jsoncons/json.hpp:756:20: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
ext/jsoncons/src/jsoncons/json.hpp: In instantiation of ‘jsoncons::value_type jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::type_id() const [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’:
ext/jsoncons/src/jsoncons/json.hpp:683:28:   required from ‘void jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::Destroy_() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:678:21:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::variant::~variant() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:2249:5:   required from ‘jsoncons::basic_json<CharT, JsonTraits, Allocator>::~basic_json() [with CharT = wchar_t; JsonTraits = jsoncons::o_json_traits<wchar_t>; Allocator = std::allocator<wchar_t>]’
ext/jsoncons/src/jsoncons/json.hpp:4006:40:   required from here
ext/jsoncons/src/jsoncons/json.hpp:756:20: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]