src/docs/excessive_precision.txt

   1 ### What it does
   2 Checks for float literals with a precision greater
   3 than that supported by the underlying type.
   4
   5 ### Why is this bad?
   6 Rust will truncate the literal silently.
   7
   8 ### Example
   9 ```
  10 let v: f32 = 0.123_456_789_9;
  11 println!("{}", v); //  0.123_456_789
  12 ```
  13
  14 Use instead:
  15 ```
  16 let v: f64 = 0.123_456_789_9;
  17 println!("{}", v); //  0.123_456_789_9
  18 ```