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Diffstat (limited to 'src/tools/clippy/src/docs/float_cmp.txt')
| -rw-r--r-- | src/tools/clippy/src/docs/float_cmp.txt | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/src/tools/clippy/src/docs/float_cmp.txt b/src/tools/clippy/src/docs/float_cmp.txt deleted file mode 100644 index c19907c90..000000000 --- a/src/tools/clippy/src/docs/float_cmp.txt +++ /dev/null @@ -1,28 +0,0 @@ -### What it does -Checks for (in-)equality comparisons on floating-point -values (apart from zero), except in functions called `*eq*` (which probably -implement equality for a type involving floats). - -### Why is this bad? -Floating point calculations are usually imprecise, so -asking if two values are *exactly* equal is asking for trouble. For a good -guide on what to do, see [the floating point -guide](http://www.floating-point-gui.de/errors/comparison). - -### Example -``` -let x = 1.2331f64; -let y = 1.2332f64; - -if y == 1.23f64 { } -if y != x {} // where both are floats -``` - -Use instead: -``` -let error_margin = f64::EPSILON; // Use an epsilon for comparison -// Or, if Rust <= 1.42, use `std::f64::EPSILON` constant instead. -// let error_margin = std::f64::EPSILON; -if (y - 1.23f64).abs() < error_margin { } -if (y - x).abs() > error_margin { } -```
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