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# std::sub_match::compare

From cppreference.com
< cpp‎ | regex‎ | sub match

int compare( const sub_match& m ) const; | (1) | (since C++11)
int compare( const string_type& s ) const; | (2) | (since C++11)
int compare( const value_type* c ) const; | (3) | (since C++11)

1) Compares two sub_match directly by comparing their underlying character sequences. Equivalent to str().compare(m.str())
2) Compares a sub_match with a std::basic_string. This function is implemented as follows. Equivalent to str().compare(s)
3) Compares a sub_match with a null-terminated sequence of the underlying character type pointed to by `s`. Equivalent to str().compare(c)

This function is infrequently used directly by application code. Instead, one of the non-member comparison operators are used.

### [edit] Parameters

m | - | a pointer to another sub_match
s | - | a pointer to a string to compare to
c | - | a pointer to a null-terminated character sequence of the underlying value_type to compare to

### [edit] Return value

A value less than zero if this sub_match is less than the other character sequence, zero if the both underlyinging character sequences are equal, greater than zero if this sub_match is greater than the other character sequence.

### [edit] Example

| This section is incomplete Reason: no example

### [edit] See also

compare | compares two strings (public member function of `std::basic_string`) [edit]

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