Brace expansion: Difference between revisions

</pre>

=={{header|Tailspin}}==

<lang tailspin>

templates braceExpansion

composer braceParse

[ <part|'[{}\\,]'>* ] // This is not simply <production> because there may be unbalanced special chars

rule production: [ <part>* ]

rule part: <alternation|balancedBraces|escapedCharacter|'[^{}\\,]+'>+

rule alternation: (<='{'>) [ <production> <alternate>+ ] (<='}'>)

rule alternate: (<=','>) <production>

rule balancedBraces: <='{'> <part>* <='}'>

rule escapedCharacter: <'\\.'>

end braceParse

templates collateSequence

@: [''];

$... -> #

$@!

when <'.*'> do

def part: $;

@: [$@... -> '$;$part;'];

otherwise

def alternates: [ $... -> collateSequence ... ];

@: [$@... -> \(def prefix: $; $alternates... -> '$prefix;$;' ! \)];

end collateSequence

$ -> braceParse -> collateSequence !

end braceExpansion

'~/{Downloads,Pictures}/*.{jpg,gif,png}' -> '"$;" expands to:$ -> braceExpansion ... -> '$#10;$;';$#10;$#10;' -> !OUT::write

'It{{em,alic}iz,erat}e{d,}, please.' -> '"$;" expands to $ -> braceExpansion ... -> '$#10;$;';$#10;$#10;' -> !OUT::write

'{,{,gotta have{ ,\, again\, }}more }cowbell!' -> '"$;" expands to $ -> braceExpansion ... -> '$#10;$;';$#10;$#10;' -> !OUT::write

'{}} some }{,{\\{ edge, edge} \,}{ cases, {here} \\\\\}' -> '"$;" expands to $ -> braceExpansion ... -> '$#10;$;';$#10;$#10;' -> !OUT::write

</lang>

{{out}}

<pre>

"~/{Downloads,Pictures}/*.{jpg,gif,png}" expands to:

~/Downloads/*.jpg

~/Downloads/*.gif

~/Downloads/*.png

~/Pictures/*.jpg

~/Pictures/*.gif

~/Pictures/*.png

"It{{em,alic}iz,erat}e{d,}, please." expands to

Itemized, please.

Itemize, please.

Italicized, please.

Italicize, please.

Iterated, please.

Iterate, please.

"{,{,gotta have{ ,\, again\, }}more }cowbell!" expands to

cowbell!

more cowbell!

gotta have more cowbell!

gotta have\, again\, more cowbell!

"{}} some }{,{\\{ edge, edge} \,}{ cases, {here} \\\\\}" expands to

{}} some }{,{\\ edge \,}{ cases, {here} \\\\\}

{}} some }{,{\\ edge \,}{ cases, {here} \\\\\}