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Subject: Re: [std-proposals] Explicit default parameters with the keyword default
From: Nikolay Mihaylov (nmmm_at_[hidden])
Date: 2020-12-29 13:05:18


func(a=a, d=10);

this can be emulated with a struct:

struct Fs{
int a = 1;
long d = 55;
char c = 14;
};

void func(Fs x);

int main(){
func({ .a = 5, .d = 10 });
}

On Tue, Dec 29, 2020 at 8:59 PM Vishal Oza via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> I would like to add another point of view and add the ability to assign
> values to the function parameters, it would do the same thing but in a
> different way. I think I had proposed the same idea a few years ago.
>
> int func(int a, int b = 6, int c = 7, int d = 8);
> func(a, default, default, 10);
> OR
> int func(int a, int b = 6, int c = 7, int d = 8);
> func(a=a, d=10);
>
> compiler writers with both GCC and clang/LLVM could give you better
> feedback about adding this feature to the language.
>
> On Tue, Dec 29, 2020 at 12:36 PM sasho648 via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
>
>> Hello so I have some functions that I want to specify for example the
>> very last argument but there are default parameter preceding it that I
>> don't want to touch. I suggest to allow the use of the `default` keyword to
>> fill those with their default values. Here is an example:
>>
>> int func(int a, int b = 6, int c = 7, int d = 8);
>>
>> Here I want to only set the last d parameter without touching the b and
>> c, leaving them default so my call would look something like this:
>>
>> func(a, default, default, 10);
>>
>> I hope you understand what my suggestion is and its purpose.
>>
>> Thanks.
>> --
>> Std-Proposals mailing list
>> Std-Proposals_at_[hidden]
>> https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals
>>
> --
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> Std-Proposals_at_[hidden]
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>



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