Compiler Explorer

Source code

#include <string>
#include <algorithm>
#include <vector>
#include <iostream>
#include <iomanip>

template<class R, class T, class U>
void replace_prefixes(R& v, T const& prefix, U const& replacement)
{
    for (auto&& element : v)
    {
        if (element.starts_with(prefix))
            element.replace(0, prefix.size(), replacement);
    }
}

using namespace std::string_literals;

template<class R, class S>
auto print_list(S& out, R const& v) -> S&
{
    auto n = std::size(v);
    decltype(n) i = 0;
    out << "{ ";
    switch (n)
    {
        case 0:
        for (; i < n; ++i)
        {
            out << ", ";
            default:
            out << std::quoted(v[i]);
        }
    }
    out << " }";
    return out;
}

int main()
{
    std::vector ls1 = {
        "/home/zy"s,
        "/home/zy/devel"s,
        "/home/zy/temp"s,
    };

auto ls2 = ls1;

replace_prefixes(ls1, ls1[0], ".");
    print_list(std::cout, ls1) << '\n';

replace_prefixes(ls2, auto(ls2[0]), ".");
    print_list(std::cout, ls2) << '\n';
}