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abcdefghij 567 hij basic_string::substr: __pos (which is 23) > this->size() (which is 20) [ edit ] Defect reports The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
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Betastd::basic_string:: substr. From cppreference.com < cpp | string | basic string ... If the requested substring extends past the end of the string, or if count == npos, the returned substring is [pos, size()). Contents. 1 Parameters; 2 Return value; 3 Exceptions; 4 Complexity; 5 Example; 6 See also Parameters. pos - position of the first character to include
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BetaNumber of characters to include in the substring (if the string is shorter, as many characters as possible are used). A value of string::npos indicates all characters until the end of the string. size_t is an unsigned integral type (the same as member type string::size_type). Return Value A string object with a substring of this object. Example
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Betastd::string_view(s).substr(6, 5); std::string_view(s.data()+6, 5); // or even "worse": std::string_view(s).remove_prefix(6).remove_suffix(1); Frankly, I don't think any of these are very nice. Right now the best thing I can think of is using aliases to simply make things less verbose. using sv = std::string_view; sv(s).substr(6, 5);
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Betaoperator== operator!= operator< operator> operator<= operator>= swap (std::basic_string): operator<< operator>>
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BetaReturns a substring [ pos, pos + count ). If the requested substring extends past the end of the string, i.e. count is greater than size() - pos (e.g. if count == npos), the returned substring is [ pos, size() ). Parameters . pos - position of the first character to include; count - length of the substring; Return value . String containing the substring [ pos, pos + count ) or [ pos, size() ).. Complexity
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BetaThe class template basic_string stores and manipulates sequences of character-like objects, which are non-array objects of TrivialType and StandardLayoutType.The class is dependent neither on the character type nor on the nature of operations on that type. The definitions of the operations are supplied via the Traits template parameter - a specialization of std::char_traits or a compatible traits class.. The elements of a basic_string are stored contiguously, that is, for a basic_string s ...
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BetaIf the requested substring extends past the end of the string, i.e. the count is greater than size ()-pos (e.g. if count == npos), the returned substring is [pos, size()). Contents 1 Parameters
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Betaabcdefghij 567 hij basic_string::substr: __pos (which is 23) > this->size() (which is 20) Defect reports The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
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BetaNumber of characters to include in the substring (if the string is shorter, as many characters as possible are used). A value of string::npos indicates all characters until the end of the string. size_t is an unsigned integral type (the same as member type string::size_type). Return Value A string object with a substring of this object. Example
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