Equivalent of C++ #__VA_ARGS__
Ronoroa
aravind.nujella at gmail.com
Sun Aug 2 16:58:12 UTC 2020
On Sunday, 2 August 2020 at 16:31:50 UTC, Adam D. Ruppe wrote:
> On Sunday, 2 August 2020 at 16:05:07 UTC, Ronoroa wrote:
>> That doesn't seem to stringize the args part like in
>> #__VA_ARGS__
>
> oh yeah i missed that part.
>
> D basically can't do that exactly, but if you pass the args as
> template things directly you can do this:
>
> ---
> void main(string[] args) {
> int a;
> int b = 34;
> dbg!(a, b); // notice the !
> }
>
> void dbg(Args...)(size_t line = __LINE__) {
> import std.stdio;
>
> write("#", line, ": ");
> foreach(idx, alias arg; Args) {
> if(idx) write(", ");
> write(arg.stringof, " = ", arg);
> }
> writeln();
> }
> ---
>
> #4: a = 0, b = 34
>
>
> Or reformat the output however you want.
That's so much nicer than the C++ macro. Thanks a lot!
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