this post was submitted on 14 Nov 2022
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A Regex which accepts valid JSON and rejects invalid JSON (twitter.com)
submitted 2 years ago by yogthos@lemmy.ml to c/programming@lemmy.ml
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^(?2)({([ \n\r\t])(((?9)(?2):((?2)(?1)(?2)))(,(?2)(?4)))?}|[(?2)((?1)(?2)(,(?5)))?]|true|false|("([^"\\p{Cc}]|\(["\/bfnrt]|u[\da-fA-F]{4}))")|-?(0|[1-9]\d*)(.\d+)?([eE][-+]?\d+)?|null)(?2)$

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[–] robohack@lemmy.ca 1 points 2 years ago

A small set of regular expressions can tokenize JSON text -- that's what lex helps with, for example. However regular expressions cannot truly parse anything.