praise: optional comma at the end of argument list is a life saver for generated code

[DlangUser38]

On Sunday, 13 September 2020 at 18:57:14 UTC, mw wrote:
> I'm referring to this:
>
> https://github.com/mingwugmail/talibd/blob/master/source/talibd.d#L109
>
>  int lookback = 
> TA_MACD_Lookback(optInFastPeriod,optInSlowPeriod,optInSignalPeriod,);
>
>
> D compiler accept (but ignore) the last comma "," is a life 
> saver for generated code.
>
> Otherwise, one have to find new ways to remove it which is a 
> nuisance.
>
>
> (The generating C macro in this case, are defined as:
>
> #define SPLIT_THEN_TAKE_VAR(X)     SPLIT(TAKE_VAR,   X),
>
>   int lookback = 
> TA_FUNC##_Lookback(FOR_EACH(SPLIT_THEN_TAKE_VAR, FUNC_INS)); 
> __NL__\
>
> https://github.com/mingwugmail/talibd/blob/master/source/talibd.h#L121
> https://github.com/mingwugmail/talibd/blob/master/source/talibd.h#L60
> )

yeah it's okish. Also good for git diff, for example when you add 
a member to an enum then you only have one line modified instead 
of two.

---
enum Foo
{
    f1
}

enum Foo
{
-   f1
+   f1,
+   f2
}
---

now in D you can just have

---
enum Foo
{
    f1,
}

enum Foo
{
     f1,
+   f2,
}
---