That did it:
// ------- variad.go -- variadic function test
package main
import("fmt";"os")
// flags
var df,ef int = 1,1
// variadic function thru empty interface
func PR(f string, a ...interface{}) {
if df!=0 { fmt.Printf(f, a...)
if ef!=0 { fmt.Fprintf(os.Stderr,f, a...) } }
}
func main() { // should print: -- -- 1 a 1 1 a 1
PR("-- ")
PR("%d a %d ",df,ef)
}
// ------- End
Thanks a lot to everybody !!
Am Sonntag, 1. Dezember 2019 03:00:03 UTC+1 schrieb Bakul Shah:
>
> func PR(f string, a ...interface{}) {
> if d { return }
> fmt.Fprintf(os.Stderr, f, a...)
> }
>
> Add appropriate imports.
>
>
> On Nov 30, 2019, at 12:08 PM, minf...@arcor.de <javascript:> wrote:
>
> C allows comma-separated argument lists via variadic macros. Whereas AFAIK
> golang allows only variadic arguments of the same type.
> (Please excuse if I am wrong, I am considering myself a golang newbie)
>
> C demo program that prints: -- -- 1 and 1 1 and 1
>
> // ###### C variadic macro test
>
> #include <stdio.h>
>
> #define PR(...) if(df){printf(__VA_ARGS__);\
> if(ef)fprintf(stderr,__VA_ARGS__);}
>
> // Flags
> int df=1, ef=1;
>
> int main(void) {
> PR("-- ");
> PR("%d and %d ",df,ef);
> }
>
> // ###### End
>
> How would one implement an equivalent PR(...) "function" in Go ???
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "golang-nuts" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to golan...@googlegroups.com <javascript:>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/golang-nuts/e36eb032-ffbc-4b26-8c41-f76aa6dcdd00%40googlegroups.com
>
> <https://groups.google.com/d/msgid/golang-nuts/e36eb032-ffbc-4b26-8c41-f76aa6dcdd00%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
>
>
>
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/ee90bef1-60c9-4f77-bf74-f9afa5080c22%40googlegroups.com.
