json object from std::ifstream

[ghost]

I'm trying to initialise a json object from file.
using json = nlohmann::json;
std::ifstream file("Config.json");
json object(file);

I get the following error on terminal

terminate called after throwing an instance of 'std::invalid_argument' what(): parse error - unexpected '�'; expected string literal

And following warning on output

Main.cpp:31:21: warning: ‘nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType>::basic_json(std::istream&, nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType>::parser_callback_t) [with ObjectType = std::map; ArrayType = std::vector; StringType = std::basic_string; BooleanType = bool; NumberIntegerType = long long int; NumberUnsignedType = long long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; std::istream = std::basic_istream; nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType>::parser_callback_t = std::function<bool(int, nlohmann::basic_json<>::parse_event_t, nlohmann::basic_json<>&)>]’ is deprecated (declared at libs/json.hpp:1945) [-Wdeprecated-declarations]
json object(file);

I'm using g++ (Ubuntu 4.9.4-2ubuntu1~12.04) 4.9.4 for compiling.
C++11 is enabled.

Am I doing something wrong?

[ghost]

The quotation marks in Config.json were wrong kind. Works now.

[kariya2]

Hey I am facing the same issue, could you please tell me what you did to fix it?

[nlohmann]

@kariya2 How does your JSON file look like? What exception do you get while parsing it?