Question

I am trying to remove whitespaces from a string

line.erase(remove_if(line.begin(), line.end(), isspace), line.end()); 

But Visual Studio 2010 (C++ Express) tells me

1   IntelliSense: no instance of function template "std::remove_if" matches the argument list   d:\parsertry\parsertry\calc.cpp 18

Full Source

Why is that? A simple piece of code

int main() {
    string line = "hello world   111    222";
    line.erase(remove_if(line.begin(), line.end(), isspace), line.end());
    cout << line << endl;

    getchar();

    return 0;
}

Verifies the function works?

Funny thing is despite that, it runs giving correct result.

Answer 1

Don’t question Intellisense, sometimes it’s better to just ignore it. The parser or the database got screwed up somehow, so it doesn’t work correctly anymore. Usually, a restart will fix the problem.

If you really want to know if the code is ill-formed, well, just hit F7 to compile.