On 2020-01-29 11:32, Trey Harris wrote:
On Wed, Jan 29, 2020 at 13:50 ToddAndMargo via perl6-users
<perl6-us...@perl.org <mailto:perl6-us...@perl.org>> wrote:
Why don't use use
typeMappings[type_index( typeid(char) )] = "char";
Finally, a definition I can work with...
We can treat this as a request for typeid(); the mapping creation and
lookup is an implementation detail.
So: the C++ typeid operator works in two modes, static (which happens at
compile-time and is inlined) and dynamic (which happens at runtime and
is subject to polymorphism). Do you want the static or the dynamic behavior?
I thought that was C not C++, but ...
As variables in Raku get boxed and coerced
all the time, I guess I am asking for dynamic.
I am after what the variable is at the moment I
ask.
Is Raku written in C or C++?
One of the guys on the C group wrote me this:
#include <iostream>
#include <typeindex>
#include <typeinfo>
#include <unordered_map>
#include <string>
using namespace std;
int main()
{
unordered_map<type_index, string> typeMappings;
typeMappings[type_index( typeid(char) )] = "char";
typeMappings[type_index( typeid(unsigned char) )] = "unsigned
char";
typeMappings[type_index( typeid(signed char) )] = "signed char";
typeMappings[type_index( typeid(short) )] = "short";
typeMappings[type_index( typeid(unsigned short) )] = "unsigned
short";
typeMappings[type_index( typeid(int) )] = "int";
typeMappings[type_index( typeid(unsigned int) )] = "unsigned
int";
typeMappings[type_index( typeid(long) )] = "long";
typeMappings[type_index( typeid(unsigned long) )] = "unsigned
long";
typeMappings[type_index( typeid(long long) )] = "long long";
typeMappings[type_index( typeid(unsigned long long) )] = "unsigned
long long";
typeMappings[type_index( typeid(float) )] = "float";
typeMappings[type_index( typeid(double) )] = "double";
typeMappings[type_index( typeid(long double) )] = "long double";
int a, c;
float b;
long long d;
cout << typeMappings[type_index( typeid(a + b) )] << endl;
cout << typeMappings[type_index( typeid(a + c) )] << endl;
cout << typeMappings[type_index( typeid(a + d) )] << endl;
}
