Does this typecast the return value to a const? bool foo() const { return bar; }?

Here’s the snippet in title (more readable) bool foo() const { return bar; }?

If not, is it different from const foo() {return bar;}? Or is it the same thing as saying the argument the function takes is a constant?

I’ve tried scouring cppreference and can’t find anything.

>Solution :

The const in the first code snippet:

bool foo() const { return bar; }

Means that the method does not modify the instance of the class that owns the method. Let’s add some more code to make this clear:

bool bar = true;

struct Foo {
    bool foo() const { return bar; }
};

int main() {
    const Foo f;
    f.foo();
    return 0;
}

When f.foo() is called the instance f is not modified. That is the meaning of the const in your snippet. It has nothing to do with the return value bar

The second code snippet is a compiler error. It would return a const foo if it had an identifier