On Mon, Nov 21, 2022, at 4:38 AM, Ulrich Windl wrote:
> But from the syntax "${parameter:-word}" it's not really obvious that the
> colon may be omitted.
You're not wrong.
> Should it be "${parameter[:]-word}" (with non-bold square brackets) instead
> (as for "name=[value]")?
No, that would be extremely confusing. But I think something like
this has been suggested before (I don't remember by whom):
${parameter-word}
${parameter:-word}
Use Default Values. [...]
${parameter=word}
${parameter:=word}
Assign Default Values. [...]
${parameter?word}
${parameter:?word}
Display Error if Null or Unset. [...]
${parameter+word}
${parameter:+word}
Use Alternate Value. [...]
> Despite of that only ":-" is typeset in bold; shouldn't "${" and "}" be
> typeset in bold, too?
I don't know. It seems like boldface is used to highlight the parts
that are unique to each form.
--
vq
