[exec.spawn.future] add missing \tcode

[ericniebler]

"ssource-t" in exec.spawn.future/p6 should be in code font.

[tkoeppe]

Thanks, @ericniebler! Yes, it seems quite a common gotcha that the \placeholder macro does not also imply "code" and that you need both. Maybe we should call that out on the wiki.

Could you please update the commit message according to our standard format https://github.com/cplusplus/draft/wiki/Commit-message-format with the positional reference? (And the change text can just say "add missing \tcode".) Thanks!

[ericniebler]

I presume there is a reason why \placeholder does not imply \tcode?

[eisenwave]

@ericniebler \placeholder is also being used in various other places as a mathematical/general placeholder, and there was a suggestion to make it render as math font even within code at some point. Unlike \exposid, it is a situational macro and doesn't always mean code.

I think what trips people up is that in code blocks and in places like \tcode{int\placeholder{N}_t}, we don't add extra code font for the placeholder; it's obtained from the context. Also, \exposid and \placeholder render the same in code, so one would assume they're interchangeable, but only \exposid adds code font everywhere. It's really quite surprising.

[tkoeppe]

exposid is semantically different in that its argument is the entire identifier. placeholder is more a general "placeholder", which (as in the intN_t example) can be used in a variety of ways and places.