you didnt end the case, wrong syntax
echo $( case x in y) printf 1 ;; x) printf 2 ;; esac )

On Sat, Feb 13, 2021, 21:21 Oğuz <oguzismailuy...@gmail.com> wrote:

>   $ bash -c ': $(case x in x) esac)'
>   bash: -c: line 1: unexpected EOF while looking for matching `)'
>   bash: -c: line 2: syntax error: unexpected end of file
>
> `case x in x) esac' is a complete case command, a syntax error is
> unexpected here.
>
>
> --
> Oğuz
>

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