std::sub_match::compare
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%29比较两sub_match直接通过比较它们的潜在字符序列。相当于str().compare(m.str())...
2%29比较asub_match带着std::basic_string相当于str().compare(s)...
3%29比较asub_match中指向的基础字符类型的空结束序列。s相当于str().compare(c)...
应用程序代码很少直接使用此函数。相反，使用非会员比较运算符之一。
参数
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 |
返回值
值小于零，如果这个子[医]匹配再少点比其他字符序列，如果两个下面的字符序列相等，则为零，如果此子字符序列大于零。[医]匹配更大比其他字符序列。
例
另见
compare | compares two strings (public member function of std::basic_string) |
|---|---|
stroperator string_type | converts to the underlying string type (public member function) |
operator==operator!=operator<operator<=operator>operator>= | compares two sub_match objects (function template) |
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