c++で型取得してみる

main.cpp

#include <iostream>
#include <cxxabi.h>

template<class T>
void func(const T& t)
{
    int status;
    std::cout << "["
    << t << "]["
    << typeid(t).name() << "]["
    << abi::__cxa_demangle(typeid(t).name(), 0, 0, &status)
    << "]" << std::endl;
}

template<class First, class... Rest>
void func(const First& first, const Rest&... rest)
{
    func(first);
    func(rest...);
}

int main(int argc, const char * argv[])
{
    func(1, 2, 0.0,
         "", 'a', NULL,
         "abc", "bcd", "bcd", "bcde",
         std::string("str"), std::string("str"), std::string("str2"));
    return 0;
}

結果

[1][i][int]
[2][i][int]
[0][d][double]
[][A1_c][char [1]]
[a][c][char]
[0][l][long]
[abc][A4_c][char [4]]
[bcd][A4_c][char [4]]
[bcd][A4_c][char [4]]
[bcde][A5_c][char [5]]
[str][NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE][std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >]
[str][NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE][std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >]
[str2][NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE][std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >]

memo

    void func()
    {
        std::cout << __PRETTY_FUNCTION__ << std::endl;
    }
    template<class First>
    void func(const First &f)
    {
        std::cout << __PRETTY_FUNCTION__ << std::endl;
    }
    template<class First, class ... Args>
    void func(const First &f, const Args & ... args)
    {
        std::cout << __PRETTY_FUNCTION__ << std::endl;
        func(f);
        func(args ...);
    }

    template<class ... Args>
    void q(const Args & ... args)
    {
        std::cout << __PRETTY_FUNCTION__ << std::endl;
        func(args...);
    }

        q();
        q("a", 1, "c");

char* を無理矢理判別するなら↓で一応できるっぽい。

                const char *CharArrayName = "char [";
                int status = 0;
                char *demangled = demangle__(typeid(value).name(), status);
                if (status == 0) {
                    if (strncmp(CharArrayName, demangled, strlen(CharArrayName)) == 0) {
                      // char*
                    }
                }
                free(demangled);