Add inverse hyperbolic functions and add ldexp and frexp functions #6463
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bors
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May 14, 2013
This is part of the numeric trait reform tracked on issue #4819
flip1995
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Feb 25, 2021
Teach SpanlessEq binding IDs changelog: Fix collapsible_match false positive Fixes rust-lang#6740 This PR changes the way `SpanlessEq` determines whether two local variables are the same. Instead of checking that the names match, it checks that the `HirId`s match. If local bindings are declared within the expressions that are being compared, `SpanlessEq` will remember bindings that correspond to each other in a `FxHashMap<HirId, HirId>`. This makes `SpanlessEq` more flexible while also fixing false positives. Example: `{ let x = 1; x + 2 }` is equal to `{ let y = 1; y + 2 }`. CC `@xFrednet` I think this will resolve some concerns in rust-lang#6463
flip1995
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Apr 8, 2021
…, r=phansch
New Lint: `branches_sharing_code`
This lint checks if all `if`-blocks contain some statements that are the same and can be moved out of the blocks to prevent code duplication. Here is an example:
```rust
let _ = if ... {
println!("Start"); // <-- Lint for code duplication
let _a = 99;
println!("End"); // <-- Lint for code duplication
false
} else {
println!("Start");
let _b = 17;
println!("End");
false
};
```
This could be written as:
```rust
println!("Start");
let _ = if ... {
let _a = 99;
false
} else {
let _b = 17;
false
};
println!("End");
```
---
This lint will get masked by the `IF_SAME_THEN_ELSE` lint. I think it makes more sense to only emit one lint per if block. This means that the folloing example:
```rust
if ... {
let _a = 17;
} else {
let _a = 17;
}
```
Will only trigger the `IF_SAME_THEN_ELSE` lint and not the `SHARED_CODE_IN_IF_BLOCKS` lint.
---
closes: rust-lang#5234
changelog: Added a new lint: `branches_sharing_code`
And hello to the one that is writing the changelog for this release :D
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This is part of the numeric trait reform tracked on issue #4819