[英]Equality comparison on the output of a wstring iterator not working
I've got a vector holding wstrings. 我有一个拿着绳子的载体。 I want to see if one of the strings has the same contents as a string in a variable:
我想看看其中一个字符串是否与变量中的字符串具有相同的内容:
std::wstring m_MyString;
void CheckExists() {
std::vector< std::wstring > list = ...
for (std::vector< std::wstring >::iterator it = list.begin(); it != list.end(); ++it) {
if (*it == m_MyString) {
...
break;
}
}
}
However, the *it == m_MyString
doesn't seem to be doing string equality - it doesn't go into the if
when there's a matching string in the vector. 但是,
*it == m_MyString
似乎并没有实现字符串相等性- if
向量中有匹配的字符串,则不会进入if
。 I think it's doing pointer/address equality. 我认为它正在做指针/地址相等。 How do I get it to do basic string equality?
如何获得基本的字符串相等性?
Turns out the problem was that the string in the variable was null-terminated, the strings in the vector weren't. 原来的问题是变量中的字符串以空值结尾,而矢量中的字符串不是。 So they looked the same, but weren't actually the same.
因此,它们看上去相同,但实际上并不相同。
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