31 Regular expressions library [re]

31.8 Class template basic_­regex [re.regex]

31.8.6 basic_­regex swap [re.regex.swap]

void swap(basic_regex& e);

1
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Effects: Swaps the contents of the two regular expressions.

2
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Postconditions: *this contains the regular expression that was in e, e contains the regular expression that was in *this.

3
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Complexity: Constant time.