Re: C23 thoughts and opinions

On 25/05/2024 08:19, Thiago Adams wrote:
...

In my view , for this sample constexpr generates noise. It also can make the compilation slower, otherwise, why not everything constexpr by defaul?
I still didn't find a useful usage for constexpr that would compensate the mess created with const, constexpr. I already saw ( I don't have it now ) proposals to make const more like constexpr in C. In C++ const is already a constant expression!
The justification for C was VLA. They should consider VLA not VLA if it has a constant expression. In other words, better break this than create a mess.
#define makes the job of constexpr.
  

One more sample of NOISE of constexpr from the same real source.
int compare(const Node* a, const Node* b)
{
     return memcmp(a, b, sizeof(Node)) == 0;
}
bool IsValid(Node * pnid)
{
     static constexpr Node node = { 1, 2 };
     return compare(pnid, &node);
}
What is expectation passing the address of compile constant to a runtime function? This is pure noise!
Nothing happens, nothing is done at compile time.
https://godbolt.org/z/ecsMf4vaY