UltiSnips

double-quoted string expansion

Asked by AbuAljori

Hello , And Thank you for making this cool plugin.

Trying to expand a snippet only if it's inside double quoted string.

this is a ruby snippet, which try to expand the '#' to '#{string}' .

 snippet "\"(.+)?#\"" "String interpolation" br
 #{${1:string}}
 endsnippet

How can I achieve this please ? . Thank you.

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SirVer
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Best SirVer (sirver) said : 		#1

You probably cannot - regular expressions are - well, regular. That means that they cannot count the number of " that come before the snippet expansion, i.e. you cannot know if you are inside a string or not.

This is an approximation of what you asked.

snippet # "Description" iw
`!p
if not snip.c:
 in_string = "rubyString" in vim.eval("synIDattr(synID(line('.'),col('.')-1,1),'name')")
 snip.rv = '#{' if in_string else "#"
`${0}`!p
if not snip.c:
 snip.rv = '' if not in_string else "}"`
endsnippet

it highjacks syntax highlighting to find out where you currently are in your file. It has some shortcomings:

1) if you are not in a string you would ideally not expand this snippet at all. But this does not work.
2) if you are in a string, you would love to have #{${1:blah}}$0, so that you can jump out of the "" with jump forward, this would need dynamic snippts though and these are not supported right now.

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AbuAljori (bekacho-php) said : 		#2

Thank you for the quick response and great support !

perfect implementation, exactly what I am looking for.

There is a lot to learn in regex in vim scripting too.

Thank you so much ! Have a good day !

Revision history for this message
AbuAljori (bekacho-php) said : 		#3

Thanks SirVer, that solved my question.