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std::basic_string::replace

From cppreference.com
< cpp‎ | string‎ | basic string
 
 
 
std::basic_string
 
basic_string& replace( size_type pos, size_type count,
                       const basic_string& str );
(1)
basic_string& replace( const_iterator first, const_iterator last,
                       const basic_string& str );
(1)
(2)
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)
template< class InputIt >

basic_string& replace( const_iterator first, const_iterator last,

                       InputIt first2, InputIt last2 );
(3)
basic_string& replace( size_type pos, size_type count,
                       const CharT* cstr, size_type count2 );
(4)
basic_string& replace( const_iterator first, const_iterator last,
                       const CharT* cstr, size_type count2 );
(4)
basic_string& replace( size_type pos, size_type count,
                       const CharT* cstr );
(5)
basic_string& replace( const_iterator first, const_iterator last,
                       const CharT* cstr );
(5)
basic_string& replace( size_type pos, size_type count,
                       size_type count2, CharT ch );
(6)
basic_string& replace( const_iterator first, const_iterator last,
                       size_type count2, CharT ch );
(6)
basic_string& replace( const_iterator first, const_iterator last,
                       std::initializer_list<CharT> ilist );
(7) (since C++11)

Replaces the part of the string indicated by either [pos, pos + count) or [first, last) with a new string.

The new string can be one of:

1) string str;
2) substring [pos2, pos2 + count2) of str
3) characters in the range [first2, last2); This overload does not participate in overload resolution if InputIt does not satisfy InputIterator. (since C++11)
4) first count2 charcters of the character string pointed to by cstr;
5) null-terminated character string pointed to by cstr;
6) count2 copies of character ch;
7) characters in the initializer list ilist;

Contents

[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
Type requirements
-
InputIt must meet the requirements of InputIterator.

[edit] Return value

*this

[edit] Exceptions

std::out_of_range if pos > length() or pos2 > str.length()

std::length_error if the resulting string will exceed maximum possible string length (std::string::npos - 1)

In any case, if an exception is thrown for any reason, this function has no effect (strong exception guarantee). (since C++11)

[edit] Example

#include <iostream>
#include <string>
 
int main()
{
    std::string str("The quick brown fox jumps over the lazy dog.");
 
    str.replace(10, 5, "red"); // (4)
 
    str.replace(str.begin(), str.begin() + 3, 1, 'A'); // (5)
 
    std::cout << str << '\n';
}

Output:

A quick red fox jumps over the lazy dog.