Description
Rust Playground Link: https://is.gd/1A99qU
I was in the middle of coming up with a toy example so I could ask someone how I can call a function stored in Rc when I noticed this:
<anon>:16:21: 16:22 error: no method named `f` found for type `Foo` in the current scope
<anon>:16 let value = foo.f(vec![1, 2, 3]);
^
<anon>:16:21: 16:22 note: did you mean to write `foo.f`?
<anon>:16 let value = foo.f(vec![1, 2, 3]);
On the third line of the error message, it says "did you mean to write foo.f?" Then on the next line, it shows that I did in fact write foo.f(...). This is clearly incorrect as it would result in the same code.
Here's the code that is causing the problem:
use std::rc::Rc;
type Func = Rc<Fn(Vec<usize>) -> usize>;
struct Foo {
a: usize,
f: Func,
}
fn main() {
let foo = Foo {
a: 22,
f: Rc::new(|x| x.len()),
};
let value = foo.f(vec![1, 2, 3]);
println!("{}", value);
}Now that I am writing all of this out, I think the error message is suggesting that I write only foo.f and get the property instead of calling it as a function. If that's the case, then the error message should probably be clarified because that is not clear from the current message in this case.
Since I wrote this on the Rust Playground using the stable version of Rust, I assume that the version info is around the same as my local version which is also running the latest Rust:
rustc 1.9.0 (e4e8b6668 2016-05-18)
binary: rustc
commit-hash: e4e8b666850a763fdf1c3c2c142856ab51e32779
commit-date: 2016-05-18
host: x86_64-unknown-linux-gnu
release: 1.9.0