使用类型为string的dereferenced Vector迭代器作为函数参数

Question

I am iterating through a vector with

std::vector<std::string>::reverse_iterator ritr; 

I need to at some point find out if a string in this vector is an operator using the function

bool IsOperator(const std::string s);

When I call the function following way,

if(IsOperator(*ritr))

eclipse complains!

Candidates are: bool IsOperator(char) bool IsOperator(std::basic_string<char,std::char_traits<char>,std::allocator<char>>)

(I have an overloaded function with accepts char instead of std::string ) However, it allows the operation of storing the deferenced iterator in a string

std::string str= *ritr;

What am I missing here?

Answer 1

Your code is fine. Disambiguating between isOperator(char) and isOperator(string) is not a problem, because a string cannot be implicitly converted to a char .

I expect your program to compile (if it doesn't, there's something else you are not showing), while the IDE complaining with red squiggles just means that your IDE has a bug.

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Also, a few remarks:

I have a function of type std::vector<std::string>

A function cannot not have type std::vector<std::string> . It can return a value of type std::vector<std::string> , or it can accept one. I guess you meant the latter.

bool IsOperator(const std::string s)

This function signature doesn't make much sense. You probably meant accepting a constant reference to an std::string object:

bool IsOperator(std::string const& s)