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Date: Fri, 30 Oct 2015 14:27:21 +0000
From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: regexp-replace and ^
Message-ID: <20151030142721.GA9766@chaz.gmail.com>
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	Zsh hackers list <zsh-workers@zsh.org>
References: <20151029190807.GA18037@chaz.gmail.com>
 <151029164635.ZM18026@torch.brasslantern.com>
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User-Agent: Mutt/1.5.21 (2010-09-15)

2015-10-29 16:46:35 -0700, Bart Schaefer:
> On Oct 29,  7:08pm, Stephane Chazelas wrote:
> }
> } Or maybe have a (E) for ERE and (P) for PCRE parameter expansion flags
> } for the ${var//pattern/replacement}.
> 
> Each of (E) and (P) already means something else.

Indeed. Bummer.

How about some (#E), (#P)? ksh93 has some ~(E:regexp) ~(P:pcre)
and ~(E)regexp, ~(P)pcre.

Probably a lot more complicated.

A pcre_subst builtin addition to the zsh/pcre module would
probably be easy.

Or a zsubst with several options for pattern/ERE/PCRE, case
insensitive...


> It ought to be possible to fix regexp-replace.  A leading "^" isn't that
> difficult, it just means the loop should only go around once (unless you
> expect it to match after embedded newlines).  The tokens that match word
> breaks require more thought.  I'm not sure what to make of lookaheads.

Well, there's also: (foo|^) and variations where you still want
to loop.

-- 
Stephane
>