On 04/05/2022 09.10, Abdullah Qasim via Std-Proposals wrote:
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> Right now, complex class is pretty WIERD:
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> complex<char> c(‘1’, ‘2’);

What's weird about this?

See [complex.numbers.general] p2;
your implementation is at liberty to make that ill-formed.

> LOL.

As I said in some other thread, please don't assume
acronyms you're familiar with have any meaning for
the diverse international audience (including non-
native speakers) in this forum.

> Why not implement a concept in <complex.h>: (in anonymous namespace)

Adding a concept to an existing template may have
ABI impact. We need an analysis when that happens
and how widespread the backward compatibility problems
might be.

Jens


> template <typename T>
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> concept C = std::_Is_nonbool_integral<T>() || std::is_floating_point_v<T>();
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> */BETTER:/*/define this concept as std::number in <stdlib.h>/
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> / /
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> /(And equivalent concepts in other classes)/
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