SCIP index doesn't include overloaded operator calls occurrences

[nicolas-guichard]

The SCIP analysis does not emit symbol occurrences for overloaded operator calls. It does emit the right occurrence when using the method syntax though.

For instance:

use std::ops::AddAssign;

struct S;

impl AddAssign for S {
    fn add_assign(&mut self, _rhs: Self) {}
}

fn main() {
    let mut s = S;
    s += S; // does not emit an add_assign occurrence
    s.add_assign(S); // emits an `impl#[S][`AddAssign<Self>`]add_assign().` occurrence
}

[nicolas-guichard]

@rustbot label A-lsif/scip