To read a complicated enough string, a tokenizer should be used to read the string as tokens (perhaps with regexes, perhaps not, depending on the tokenizer).
These tokens should then be passed to the parser, which will process them with grammar rules, which are definitely not regexes.
Here's the science: swtch.com/~rsc/regexp/regexp1when embedded — that allows whitespace (line breaking, indenting) and comments.
Forms layout can be generated either automatically or manually – using templates.
Something that looks so complicated - just must be the answer to any question.
They tend to think that every problem is solvable using regular expressions.
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When exploring regular expressions (otherwise known as Reg Ex-es), there are many individuals who seem to see regular expressions as the Holy Grail.