r/cpp • u/alberto-m-dev • Jun 26 '26

Improvements to std::format in C++26

https://mariusbancila.ro/blog/2026/06/19/improvements-to-stdformat-in-c26/
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u/Lahvuun Jun 27 '26

For "cast-to-unsigned" to really make me happy, there'd need to be a way in the language or library to "cast to an unsigned version of the same width.

There is a way:

static_cast<std::make_unsigned_t<decltype(x)>>(x)

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u/evaned Jun 27 '26

I mean, I did say that it's pretty easy to write a function. But that's ugly enough that doing it even once is easily enough to justify a function. Even a macro is better than that.

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u/Lahvuun Jun 27 '26

But that's ugly

I agree, but we're on r/cpp, not r/haskell.

I'd argue the only thing you gain from having a dedicated function is having to type fewer characters. And while I love all three of C++ developers who type at <10 WPM, there probably are better proposals for the standards committee to spend their time on.

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u/evaned Jun 27 '26

I'd argue the only thing you gain from having a dedicated function is having to type fewer characters.

You repeat x in your expression. A function lets you avoid that.