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Date: Sun, 29 Nov 2015 20:47:01 -0800
From: Ray Andrews <rayandrews@eastlink.ca>
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To: zsh-users@zsh.org
Subject: Re: lexing
References: <565B18C6.6090707@eastlink.ca>
 <151129100735.ZM24525@torch.brasslantern.com> <565BB016.6020905@eastlink.ca>
 <20151130033348.GJ2504@tarsus.local2> <565BCE96.4070406@eastlink.ca>
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A fruitful hunt for highlighting errors:

These are not mistaken as comments:

    #!/usr/bin/zsh
    ${(kv#)var}
    ${#var}
    $#var
    ${(s. # .)var}
    ${var// # /test}
    ${var//# /test}
    ${var%#}, ${var:-#}
    2#111
      '#', "#", \#
      `posh -c 'echo foo#bar'`


These are mistaken for comments:

    (#b)
    (#c1,2)
    (#a3)
    $[[#2]7]
    ##Z

... as are these:

    $(( ##\e )) is 27,
    (( #VAR ))
    $(( #var ))


... but, given that there is preceding whitespace, would these three not 
break Bart's rule?  Perhaps the whitespace here is does not qualify as 
'word separating'?  Or is the " $(()) " construct an exception?

... and unfortunately:

     $(# this IS a comment).

is not considered to be a comment.