31 Regular expressions library [re]

31.9 Class template sub_­match [re.submatch]

31.9.1 sub_­match members [re.submatch.members]

constexpr sub_match();

1
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Effects: Value-initializes the pair base class subobject and the member matched.

difference_type length() const;

2
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Returns: matched ? distance(first, second) : 0.

operator string_type() const;

3
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Returns: matched ? string_­type(first, second) : string_­type().

string_type str() const;

4
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Returns: matched ? string_­type(first, second) : string_­type().

int compare(const sub_match& s) const;

5
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Returns: str().compare(s.str()).

int compare(const string_type& s) const;

6
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Returns: str().compare(s).

int compare(const value_type* s) const;

7
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Returns: str().compare(s).