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Message from discussion How to insert conditionnal text
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Paul Pichaureau  
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 More options Jul 23 2012, 4:57 am
From: Paul Pichaureau <paul.pichaur...@gmail.com>
Date: Mon, 23 Jul 2012 01:57:27 -0700 (PDT)
Local: Mon, Jul 23 2012 4:57 am
Subject: Re: How to insert conditionnal text
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>  I've polished a little the snippet, since I prefer to have some
> description. This is my result:

> # -*- mode: snippet -*-
> # key: rt
> # group: math
> # name : \sqrt[n]{x} or \sqrt{x}  if n is the null string
> # --
> \sqrt${1:$(if (string-equal "<power>" yas/text) ""
> "[")}${1:<power>}${1:$(if (string-equal "<power>" yas/text) "" "]")}{$2}$0

Unfortunately, this doesn't work, as I can't have an empty argument here
(if i press <del>, the yas/text is empty but the [] are typeset..)

Not very important, but if you have an advice, it will be welcomed !

> Thank you very much, it will help me a lot !

> Le dimanche 22 juillet 2012 20:33:27 UTC+2, Joao a écrit :

>> This is the answer I was going to recommend, but I believe you can
>> replace the (string-equal "" yas/text) call with just a call to the
>> (yas/text) function, which returns nil if yas/text is the empty
>> string.

>> I'll test the recursive case when I find the time. Meanwhile maybe you
>> could open an issue at
>> https://github.com/capitaomorte/yasnippet/issues.

>> João

>> On Sun, Jul 22, 2012 at 5:55 PM, OMF <obsessivemathsfr...@gmail.com>
>> wrote:
>> > I managed to solve this problem by using embedded elisp. For example,
>> here
>> > is a latex mode sqrt snippet that will include left and right square
>> > brackets if the field $1 is non empty

>> > # -*- mode: snippet -*-
>> > # key: rt
>> > # group: math
>> > # name : \sqrt[n]{x} or \sqrt{x}  if n is the null string
>> > # --
>> > \sqrt${1:$(if (string-equal "" yas/text) "" "[")}${1:}${1:$(if
>> (string-equal
>> > "" yas/text) "" "]")}{$2}$0

>> > However, there is a problem with calling this recursively, but that is
>> for
>> > another thread.

>> > On Sunday, July 22, 2012 10:42:24 AM UTC+1, Paul Pichaureau wrote:

>> >> Hi,

>> >> I'm a new user of yasnippet, and I really enjoy it! It helps me *a
>> lot* !

>> >> I use a lot of command on LaTeX with key syntax. I would like to make
>> some
>> >> part of snippet disappear if the I don't enter a string. For example

>> >> test<Tab>

>> >> will produce

>> >> \test[title={_}]

>> >> (the underscore is the cursor)

>> >> Now if I type <Tab>, the resulting text in the buffer should be

>> >> \test

>> >> But if i type 'doo', I would like to see

>> >> \test[title={doo}]

>> >> Do you know if it's possible ?

>> >> Thank you very much !

>> >> --
>> >>   Paul Pichaureau

>> > --
>> > You received this message because you are subscribed to the Google
>> Groups
>> > "smart-snippet and YASnippet" group.
>> > To view this discussion on the web visit
>> > https://groups.google.com/d/msg/smart-snippet/-/rL_MZIEVR_sJ.

>> > To post to this group, send email to smart-snippet@googlegroups.com.
>> > To unsubscribe from this group, send email to
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>> > For more options, visit this group at
>> > http://groups.google.com/group/smart-snippet?hl=en.

>> --
>> João Távora


 
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