Replace boost::bind with lambda

Question

I would like to replace a boost::bind with a lambda. Can you please advise on how to go about doing this?

I have a function declared as

bool myFunction(const vector<double>& input, vector<double>& output) const
{
    ...
}
...
...
boost::bind<bool>(std::mem_fn(&classname::myFunction), this, _1, _2) // Replace with lambda

Answer 1

I get an error trying to declare vector<const double>.

The C++ Standard forbids containers of const elements because allocator is ill-formed.'

Confirmed here

So let's assume you can change the signature of myFunction to be:

bool myFunction(const vector<double>& input, vector<double>& output)
{
    return false;
}

To set:

auto fn = [this](const vector<double>& input, vector<double>& output) {
    return myFunction(input, output);
};

Or if you need to save fn off as a member variable:

std::function<bool(const vector<double>&, vector<double>&)> fn =
    [this](const vector<double>& input, vector<double>& output) {
        return myFunction(input, output);
    };

To invoke:

fn(inputVector, outputVector);