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implement Ord, TotalEq and TotalOrd for char #6064

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implement Ord, TotalEq and TotalOrd for char #6064

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bors added a commit that referenced this pull request Apr 27, 2013
@bors
auto merge of #6064 : thestinger/rust/char, r=catamorphism
47dbcdc
@bors bors closed this Apr 27, 2013
flip1995 pushed a commit to flip1995/rust that referenced this pull request Feb 25, 2021
@bors
Auto merge of rust-lang#6662 - Y-Nak:default-numeric-fallback, r=flip…
e2753f9 
…1995

New lint: default_numeric_fallback

fixes rust-lang#6064
r? `@flip1995`

As we discussed in [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20.236064/near/224647188) and [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20clippy.236064/near/224746333),   I start implementing this lint from the strictest version.
In this PR, I'll allow the below two cases to pass the lint to reduce FPs.

1. Appearances of unsuffixed numeric literals in `Local` if `Local` has a type annotation, for example:
```rust
// Good.
let x: i32 = 1;

// Also good.
let x: (i32, i32) = if cond {
   (1, 2)
} else {
   (2, 3)
};
```

2. Appearances of unsuffixed numeric literals in args of `Call` or `MethodCall`  if corresponding arguments of their signature have concrete types, for example:
```rust
fn foo_mono(x: i32) -> i32 {
    x
}

fn foo_poly<T>(t: T) -> t {
    t
}

// Good.
let x = foo_mono(13);

// Still bad.
let x: i32 = foo_poly(13);
```

changelog: Added restriction lint: `default_numeric_fallback`
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@thestinger @bors