Re: Decode output from typeid().name()

[C.W.Holeman II]

Pedro Lamarão wrote:
> On 17 fev, 12:13, "C.W.Holeman II" <cwhii_google_s...@yahoo.com>
> wrote:
> > Pedro Lamarão wrote:
> > > On 16 fev, 20:27, "C.W.Holeman II" <cwhii_google_s...@yahoo.com>
> > > wrote:
> > > > Is there a reference that decodes the output from typeid().name()?
> > > The C++ Standard does not specify the value of that expression.
> > > It could very well be the null string in a conforming specification.
> > Which is the reason I posted to gnu.g++.help not c++.
>
> Good point.
>
> GCC implements the Itanium C++ ABI, specified here:
>
> http://www.codesourcery.com/public/cxx-abi/abi.html
>
> You will see that, contrary to my expectation, this specification does
> in fact guarantee some form to that expression.
> Search for the demangler API.

Thanks.

#include <iostream>
#include <typeinfo>
#include <cxxabi.h>
class X {
public:
    template<typename T> void operator[](T const&){
        size_t len;
        int s;
        char* p=abi::__cxa_demangle(typeid(T).name(), 0, &len, &s);
        std::cout << typeid(T).name() << ": " << p << std::endl;
    }
};
int main(){
    X x;
    x["Hello, world!"];
    x[1];
    x[-1.234];
    x[x];
}

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C.W.Holeman II cwhii5@Julian5Locals.com-5s http://JulianLocals.com/cwhii
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