Re: [boost] [Boost.Stringify] Yet another formatting library.

8 Jun 2019

      On Sat, Jun 8, 2019 at 9:53 AM Helmut Zeisel  wrote:
...
Actually I did not check your library, but I would be interested in a
formatting library that is not based on functions, but on function objects.
The usage would not be something like
std::string s1 = to_string("base10", 15);
std::string s2 = to_string("base16", 42);
but
stringifier dec;
dec.set_base(10);
std::string s1=hex(15);
stringifier hex;
hex.set_base(16);
std::string s2=hex(42);
To format values in Boost.Stringify, one does like this, for example:

    namespace strf = boost::stringify;
    int v = 255;
    std::string s = strf::to_string(v, " in hexadecimal is ", strf::hex(v));
    assert(s == "255 in hexadecimal is ff");

So could maybe lambdas solve your need ?

    auto hex = [](int v){return strf::to_string(strf::hex(v)); };
    auto dec = [](int v){return strf::to_string(v); };

    auto s1 = hex(15);
    auto s2 = dec(42);
    assert(s1 == "f");
    assert(s2 == "42");
...
With a function object based interface, one could easily store and reuse
different formating options in parallel.
Not clear to me what you mean by that. Could you explain better ?

Re: [boost] [Boost.Stringify] Yet another formatting library.

Roberto Hinz