1 This error indicates that the numeric value for the method being passed exists
2 but the type of the numeric value or binding could not be identified.
4 The error happens on numeric literals:
10 and on numeric bindings without an identified concrete type:
14 x.neg(); // same error as above
17 Because of this, you must give the numeric literal or binding a type:
22 let _ = 2.0_f32.neg();
25 let _ = (2.0 as f32).neg();