On 15/03/2018 11:27, Herbert Xu wrote:
Harald van Dijk <harald@xxxxxxxxxxx> wrote:
Changing dash to support this would in my opinion be unreasonable, as it
would require a total rewrite of the parser.
I don't think it's that hard.
It is if you want to do it the way POSIX specifies. You're adding a
special exception in the parser. I don't see how this approach can be
extended to handle the other examples in my mail:
cat <<`one two`
ok
`one two`
`one two` is a single word, so should be allowed as a heredoc delimiter.
By treating ` as a literal and not looking for the matching closing `,
this only ends up taking `one as the delimiter, does it not?
And to hopefully better demonstrate the need to not introduce special
parsing exceptions:
cat <<$(case x in 0) echo bug ;; esac)
ok
$(case x in 0) echo bug ;; esac)
Yes, this actually works in bash/zsh/yash.
Cheers,
Harald van Dijk
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