std::basic_string::replace

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)
basic_string& replace( size_type pos, size_type count, std::basic_string_view<CharT, Traits> sv );	(8)	(since C++17)
basic_string& replace( const_iterator first, const_iterator last, std::basic_string_view<CharT, Traits> sv );	(9)	(since C++17)
template < class T > basic_string& replace( size_type pos, size_type count, const T& t, size_type pos2, size_type count2 = npos );	(10)	(since C++17)

替换由[pos, pos + count)或[first, last)用新的绳子。

新字符串可以是：

1%29字符串str；

2%29子串[pos2, pos2 + count2)成str，除非count2==npos或者是否会延伸到过去str.size()，，，[pos2, str.size())被使用了。

3%29个字符在范围内[first2, last2)。此重载与重载%286%29的效果相同，如果InputIt是一个整体类型。

4%29首count2所指向的字符串的字符。cstr；

所指向的5%29空终止字符串。cstr；

6%29count2字符副本ch；

初始化程序列表中的7%29个字符ilist；

字符串视图中的8%29个字符sv28%，相当于replace(pos, count, sv.data(), sv.size())%29

字符串视图中的9%29个字符sv28%，相当于replace(first - begin(), last - first, sv)%29

10%29次浏览[pos2, pos2 + count2)字符串视图的sv，转换自t好像std::basic_string_view<CharT, Traits> sv = t;，除非count2==npos或者它是否会延伸到过去sv.size()，，，[pos2, sv.size())被使用了。此重载只参与在下列情况下的重载解决方案：std::is_convertible_v<const T&,std::basic_string_view<CharT, Traits>>是true和std::is_convertible_v<const T&, const CharT*>是false...

参数

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
sv	-	std::basic_string_view with the characters to use for replacement
t	-	object (convertible to std::basic_string_view) with the characters to use for replacement

返回值

*this...

例外

std::out_of_range如果pos > length()或pos2 > str.length()...

std::length_error如果结果字符串将超过最大可能字符串长度%28std::string::npos- 129%。

在任何情况下，如果出于任何原因引发异常，则此函数不具有%28强异常保证%29的效果。%28自C++11%29。

例

二次

#include <iostream>
#include <string>
 
int main()
{
    std::string str("The quick brown fox jumps over the lazy dog.");
 
    str.replace(10, 5, "red"); // (5)
 
    str.replace(str.begin(), str.begin() + 3, 1, 'A'); // (6)
 
    std::cout << str << '\n';
}

二次

产出：

二次

A quick red fox jumps over the lazy dog.

二次

 © cppreference.com

在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/string/basic[医]字符串/替换

本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com

最后更新于：2017-12-18