std::numpun...ecimal_point(3)

🎀 NAME 🎀

std::numpunct::decimal_point,do_decimal_point — bestie, this is the std::numpun...ecimal_point(3) page from the C++ Standard Libary manual, and it's literally about the tiny character that splits the integer part from the fractional part 💅✨.

✨ Synopsis ✨

Defined in header <locale>:

public:                                     (1)
char_type decimal_point() const;

protected:                                  (2)
virtual char_type do_decimal_point() const;

1. Public member function, calls the member function do_decimal_point of the most derived class.
2. Returns the character to be used as the decimal separator between integer and fractional parts.

So (1) is the public bestie and (2) is the protected virtual one, periodt 🫶.

💖 Return value 💖

The value of type char_type to use as the decimal separator. The standard specializations of std::numpunct return '.' and L'.' 🔥.

🦋 Example 🦋

Ok so here's the code, and yes it's giving custom facet main-character energy:

// Run this code

#include <iostream>
#include <locale>

struct slash : std::numpunct<char>
{
    char do_decimal_point() const { return '/'; }  // separate with slash
};

int main()
{
    std::cout.precision(10);
    std::cout << "default locale: " << 1234.5678 << '\n';
    std::cout.imbue(std::locale(std::cout.getloc(), new slash));
    std::cout << "locale with modified numpunct: " << 1234.5678 << '\n';
}

🌸 Output 🌸

default locale: 1234.5678
locale with modified numpunct: 1234/5678

Source/version + date, for the record: http://cppreference.com, 2024.06.10, page std::numpun...ecimal_point(3) 🫶✨ Bye bestie, go separate those decimals 💅💖