An error message should not contain a keyword x such that searching rust + x has 0 relevant results on the first page

[SRGOM]

Case in point: I get an error:

the trait `Foo` cannot be made into an object
....
method add has no receiver

I looked up rust receiver but couldn't find any relevant results. Upon investigating further, in this case, method add does not have a self parameter would be more appropriate.

[frewsxcv]

Is it possible you could share the code that results in this error?

[jonas-schievink]

Anything like this'll work:

trait Tr { fn recv(); }

fn main() {
    let t: &Tr = panic!();
}

[SRGOM]

What @jonas-schievink said, my code:

trait Foo{
    fn add( s: Self, o: Self ) -> Self;
}

impl Foo for i32{
    fn add( s: Self, o: Self ) -> Self {
        s + o
    }
}

fn scratchpad()
{
     let a: &Foo = &99;
}

[estebank]

For me the fourth result for "rust method has no receiver" is the Error Index, where there's a full explanation of error E0038 (which you can also see using rustc --explain E0038). That explanation has a subsection titled "Method has no receiver" which explain this case and proposes a solution:

Adding a Self: Sized bound to these methods will generally make this compile.

[SRGOM]

@estebank I hit 1st and 3rd results on that one and they were irrelevant so I figured i'll try to understand the problem from the bottom. That's why I searched "Rust receiver" (without quotes) as the issue title says.

[durka]

I think "receiver" is the correct term here and as mentioned, rustc --explain E0038 has a good amount of explanation. So I understand @SRGOM's frustration but I don't think there is really anything to do here, besides maybe adding a section to the Book along these lines.

[nikomatsakis]

The receiver term is pretty standard "OO jargon", but I think that it would be clearer still for us to say "no self parameter".

[nikomatsakis]

Also, in my opinion, an associated function without a parameter named self is not a method at all, but just a function; so I'd probably say something like "the function add has no self parameter")