How do you print a variable's address in Carbon?

[JushBJJ]

In C, printing a simple address would be like:

#include <stdio.h>

int main(void) {
    char *str1 = "This is a string literal";
    char *str2 = str1;

    printf("%p", str2);

    return 0;
}

In Carbon, doing similar will return an error.

package sample api;

fn Main() -> i32{
        let str1: String = "test";
        let str2: auto = &str1;

        Print("%p", str2);
        return 0;
}

Error: COMPILATION ERROR: ./address.carbon:5: Argument to & should be an lvalue.

[geoffromer]

let declares a variable as an r-value, which means that it doesn't have an address. To declare a variable that has an address, use var instead of let.

[JushBJJ]

I see thanks for that 👍
Print doesn't seem to support outputting addresses?

[geoffromer]

Yeah, that hasn't been implemented yet. I'm not sure implementing it should be a priority right now, because Explorer represents addresses in a very different way than a compiler would, so the output is likely to be confusing.