https://eel.is/c++draft/cmath.syn#2

Notice how we're using \placeholder at a top-level, not in \tcode, which means that we're just getting regular italic text. This feels wrong and looks wrong.

I would have expected that in these two paragraphs, we would say floating-point-type (italic code font) which matches exactly how these parameters are rendered in the code block.

More broadly, is it ever acceptable to use \placeholder outside of a code block or \tcode?