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pattern_test<-"\\{(?:[^{}]++|(?R))*}"
teststring <- "{the {dog} is {hot}},{the {cat} is {lazy}}"
unlist(regmatches(teststring, gregexpr(pattern_test, teststring, perl=TRUE)))
Success #stdin #stdout 0.22s 39272KB
comments (?)
stdin 
Standard input is empty
stdout 
[1] "{the {dog} is {hot}}"  "{the {cat} is {lazy}}"
https://ideone.com/bEU8R9
language:
R (R 3.5.2)
created:
4 years ago
visibility:
secret

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