Re: tupleof of class instance... but enumerate _all_ the instance variables

[bauss via Digitalmars-d-learn]

On Monday, 30 June 2025 at 16:37:01 UTC, Andy Valencia wrote:
On Saturday, 28 June 2025 at 10:41:47 UTC, Nick Treleaven wrote:
            static foreach (field; B.tupleof)
            {{
                enum s = __traits(identifier, field);
                pragma(msg, s);
                // access runtime field
                __traits(getMember, d, s)++;
            }}

One last question, if you would?  Why the double open braces?  
I tried, and got:

tst57.d(26): Error: declaration `tst57.main.s` is already 
defined
tst57.d(26):        `variable` `s` is defined here

if I changed to a single open brace?

Thanks again,
Andy

the static foreach will emit all code in scope, which means each 
iteration will emit the code in the scope, so you double brace it 
to create individual scopes that don't "overlap".