[puffybuf]

how would this work with internationalized strings? especially if you have to change the order of things? You'd still need a string version with object ordering I would think

[edflsafoiewq]

f-strings are not an internationalization library.

[wakawaka28]

The question was, how would you use this if you have i18n requirements. Format strings are normally part of a translation. I think the bad answer is to embed the entire f-string for a translation as usual, except this can't work because C++ f-strings would need to be compiled. The better answer is, don't use f-strings for this because you don't want translators to monkey around with code and you don't want to compile 50 versions of your code.

[mkoubaa]

I'm skeptical that people would want to do this in a single expression.

[rerdavies]

Do what? Allow translators to reorder the appearance of arguments in a translated format string? It's a completely routine (and completely necessary) feature when doing translations.