Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > gnu.bash.bug > #14895 > unrolled thread

[minor] for/select parsing inconsistency

Back to article view | Back to gnu.bash.bug

Contents

  [minor] for/select parsing inconsistency Martijn Dekker <martijn@inlv.org> - 2018-12-07 14:02 +0100

#14895 — [minor] for/select parsing inconsistency

There is a minor inconsistency in grammatical parsing between 'for' and 
'select' loops. Since 'select' is basically a glorified 'for', it seems 
to me that they should parse the same way.

$ bash -c 'for x in; do :; done'
$ bash -c 'select x in; do :; done'
bash: -c: line 0: syntax error near unexpected token `;'
bash: -c: line 0: `select x in; do :; done'
$ bash -c 'foo=; select x in $foo; do :; done'
$

An empty iteration argument list is not accepted by 'select', unless it 
results from an expansion. 'for' does accept this.

On ksh93, mksh, and zsh, both 'for' and 'select' accept a literal empty 
list. On shells without 'select' (dash, yash), 'for' accepts it.

So it seems to me that 'select' on bash should change to match 'for'.

Thanks,

- M.

[toc] | [standalone]

Back to top | Article view | gnu.bash.bug

csiph-web