Add empty() constructor to RegexSet
#715
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BurntSushi
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Oct 11, 2020
This goes nicely with the new 'is_empty' predicate introduced in the previous commit. It's a bit of a nicer way of building a set with no regexes instead of the weird `&[""; 0]` or something even stranger since the RegexSet::new constructor is polymorphic. Closes #715
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A slightly nicer constructor for ergonomics. Useful when used as part of a larger builder.
Doctested with
is_emptyfrom #687.