std::basic_string<CharT,Traits,Allocator>::replace - cppreference.com (original) (raw)
| basic_string& replace( size_type pos, size_type count, const basic_string& str ); | (1) | (constexpr since C++20) |
|---|---|---|
| basic_string& replace( const_iterator first, const_iterator last, const basic_string& str ); | (2) | (constexpr since C++20) |
| (3) | ||
| basic_string& replace( size_type pos, size_type count, const basic_string& str, size_type pos2, size_type count2 ); | (until C++14) | |
| basic_string& replace( size_type pos, size_type count, const basic_string& str, size_type pos2, size_type count2 = npos ); | (since C++14) (constexpr since C++20) | |
| basic_string& replace( size_type pos, size_type count, const CharT* cstr, size_type count2 ); | (4) | (constexpr since C++20) |
| basic_string& replace( const_iterator first, const_iterator last, const CharT* cstr, size_type count2 ); | (5) | (constexpr since C++20) |
| basic_string& replace( size_type pos, size_type count, const CharT* cstr ); | (6) | (constexpr since C++20) |
| basic_string& replace( const_iterator first, const_iterator last, const CharT* cstr ); | (7) | (constexpr since C++20) |
| basic_string& replace( size_type pos, size_type count, size_type count2, CharT ch ); | (8) | (constexpr since C++20) |
| basic_string& replace( const_iterator first, const_iterator last, size_type count2, CharT ch ); | (9) | (constexpr since C++20) |
| template< class InputIt > basic_string& replace( const_iterator first, const_iterator last, InputIt first2, InputIt last2 ); | (10) | (constexpr since C++20) |
| basic_string& replace( const_iterator first, const_iterator last, std::initializer_list<CharT> ilist ); | (11) | (since C++11) (constexpr since C++20) |
| template< class StringViewLike > basic_string& replace( size_type pos, size_type count, const StringViewLike& t ); | (12) | (since C++17) (constexpr since C++20) |
| template< class StringViewLike > basic_string& replace( const_iterator first, const_iterator last, const StringViewLike& t ); | (13) | (since C++17) (constexpr since C++20) |
| template< class StringViewLike > basic_string& replace( size_type pos, size_type count, const StringViewLike& t, size_type pos2, size_type count2 = npos ); | (14) | (since C++17) (constexpr since C++20) |
Replaces the characters in the range [begin() + pos, begin() + std::min(pos + count, size())) or [first, last) with given characters.
1,2) Those characters are replaced with str.
- Those characters are replaced with a substring
[pos2,std::min(pos2 + count2, str.size()))of str.
4,5) Those characters are replaced with the characters in the range [cstr, cstr + count2).
If [cstr, cstr + count2) is not a valid range, the behavior is undefined.
6,7) Those characters are replaced with the characters in the range [cstr, cstr + Traits::length(cstr)).
8,9) Those characters are replaced with count2 copies of ch.
Those characters are replaced with the characters in the range
[first2,last2)as if by replace(first, last, basic_string(first2, last2, get_allocator())).Those characters are replaced with the characters in ilist.
12,13) Implicitly converts t to a string view sv as if by std::basic_string_view<CharT, Traits> sv = t;, then those characters are replaced with the characters from sv.
- Implicitly converts t to a string view sv as if by std::basic_string_view<CharT, Traits> sv = t;, then those characters are replaced with the characters from the subview sv.substr(pos2, count2).
If [begin(), first) or [first, last) is not a valid range, the behavior is undefined.
[edit] Parameters
| pos | - | start of the substring that is going to be replaced |
|---|---|---|
| count | - | length of the substring that is going to be replaced |
| first, last | - | range of characters that is going to be replaced |
| str | - | string to use for replacement |
| pos2 | - | start of the substring to replace with |
| count2 | - | number of characters to replace with |
| cstr | - | pointer to the character string to use for replacement |
| ch | - | character value to use for replacement |
| first2, last2 | - | range of characters to use for replacement |
| ilist | - | initializer list with the characters to use for replacement |
| t | - | object (convertible to std::basic_string_view) with the characters to use for replacement |
| Type requirements | ||
| -InputIt must meet the requirements of LegacyInputIterator. |
[edit] Return value
*this.
[edit] Exceptions
If the operation would cause size() to exceed max_size(), throws std::length_error.
If an exception is thrown for any reason, these functions have no effect (strong exception safety guarantee).
[edit] Example
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 847 | C++98 | there was no exception safety guarantee | added strong exception safety guarantee |
| LWG 1323 | C++98 | the types of first and last were iterator | changed to const_iterator |
| LWG 2946 | C++17 | overloads (12,13) caused ambiguity in some cases | avoided by making them templates |
[edit] See also
| | replaces specified portion of a string with a range of characters (public member function) [edit] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | replaces occurrences of a regular expression with formatted replacement text (function template) [edit] | | | replaces all values satisfying specific criteria with another value (function template) [edit] |