initializer_list
When using Boost.JSON I stumbled upon the following issue:
boost::json::value jv(1); // creates a number type
boost::json::value jv{1}; // creates an array type
The value object is something like this:
struct Value
{
Value(int);
Value(double);
Value(std::initializer_list<int>);
};
This gives the following invocations:
Value vl1(1); // invokes Value(int) constructor
Value vl2{1}; // invokes Value(std::initializer_list<int>); constructor
This is a know issue in C++. A programming language should be unambiguously be interpretable and the C++ had decided that in such case the initializer_list has precedence. Not sure if that's a good solution since the ambiguity may only appear when running under the debugger or at customer site. Personally I would require that double braces are used but the C++ committee has decided otherwise. The uniform initialization problem is still not solved.
